Western Telematic Switch NPS 2HD User Manual

NPS-2HD  
Heavy Duty Network Power Switches  
User's Guide  
 
Warnings and Cautions:  
No Serviceable Parts Inside;  
Authorized Service Personnel Only  
Do not attempt to repair or service this device yourself. Internal  
components must be serviced by authorized personnel only.  
Shock Hazard - Do Not Enter  
Nameplate Power Warning  
This device should only be operated with the type of power  
source indicated on the instrument nameplate. If you are not  
sure of the type of power service available, consult your local  
power company.  
Connect unit only to a properly measured supply. Use  
only three wire cord which is provided with the unit.  
Reliable earthing of this equipment must be maintained.  
Particular attention should be given to supply  
connections when connecting to power strips, rather than  
direct connections to the branch circuit.  
Rack Mount Installation  
When installing this device in an instrument rack, the following  
factors must be accounted for:  
1. Enclosed Racks: Enclosed racks must provide adequate  
ventilation. Make certain that the rack is not overly  
crowded and note that each unit in the rack generates its  
own heat. An enclosed rack should have louvered sides  
and a fan to circulate cooling air.  
When mounting the unit in an enclosed rack with a  
ventilation fan at the top of the rack, note that excessive  
heat generated by devices at the bottom of the rack can be  
drawn upward and into the ventilation slots of units  
located at the top. Make certain to provide adequate  
ventilation for equipment installed at the bottom of  
the rack.  
(Continued)  
 
Rack Mount Installation (Continued)  
1. Enclosed Racks (Continued):  
The ambient within the rack may be greater than room  
ambient. Installation should be such that the amount of air  
flow required for safe operation is not compromised. The  
maximum temperature for the equipment in this  
environment is 45°C. Consideration should be given to the  
maximum rated ambient.  
Installation should be such that a hazardous stability  
condition is not achieved due to uneven loading.  
2. Open Racks: Make certain that the rack frame does not  
block the ventilation slots on the instrument cover. If the  
device is installed on sliders, check the unit when seated  
all the way into the rack to make certain that ventilation  
slots are not blocked.  
Ventilation  
Slots in the instrument cover are provided to allow ventilation  
for heat dissipation. To ensure safe, reliable operation, these  
openings must not be covered or blocked.  
Disconnect Power  
If any of the following events are noted, immediately disconnect  
the unit from the outlet and contact qualified service personnel:  
1. If the power cord becomes frayed or damaged.  
2. If liquid has been spilled into the device or if the device  
has been exposed to rain or water.  
 
Table of Contents  
 
List of Figures  
 
1. Introduction  
Network equipment sometimes "locks-up", requiring a service  
call just to flip the power switch to perform a simple reboot. The  
NPS-2HD Heavy Duty Network Power Switch gives you the  
ability to perform this function from anywhere on the  
LAN/WAN, or if the network is down, to simply dial-in from a  
modem for out-of-band power control.  
Intelligent Power Control  
The NPS-2HD can communicate over any TCP/IP network using  
standard Telnet, or out-of-band using an external modem and  
terminal emulation. Each outlet can be assigned an individual  
password, device name, reboot delay time and unique power-up  
default status.  
Security  
Address specific IP security masks prevent unauthorized users  
from accessing the NPS command menu via network. The NPS  
provides two separate password security levels; System level and  
User level. The System password allows access to all  
configuration and command functions. The User password  
allows limited access to command functions.  
Easy to Use, Easy to Configure  
The NPS can be configured over the network, via modem, or  
locally via the NPS Console Port. Easy-to-use commands let you  
assign a location name, set system parameters and view plug  
status. Outlets can be switched On, Off, or Booted using plug  
numbers or names.  
Features:  
· Dual 20 Amp Circuits  
· On/Off/Reboot Switching  
· Integral 10Base-T Interface  
· RS232 Modem and Console Ports  
· Outlet-Specific Password Security  
· Network Security Features  
· Manual On/Off Buttons  
 
Typographic Conventions  
Throughout this manual, typefaces and characters have been used  
to denote the following:  
COURIER FONT Indicates characters typed on the keyboard.  
For example, /ON 1 or /OFF 2.  
[Bold Font]  
Text set in bold face and enclosed in  
square brackets indicates a specific key.  
For example, [Enter] or [Esc].  
 
2. Unit Description  
2.1. Front Panel  
As shown in Figure 2.1, the NPS-2HD front panel includes a  
series of LED indicators which function as follows:  
ON: Lights when AC Power is applied to the NPS-2HD.  
À
Á
RDY: Flashes when the NPS-2HD is ready to receive  
commands.  
RXD: Lights when the NPS-2HD receives commands.  
DCD: Lights when the Modem Port detects the Carrier.  
NET: Lights when a Telnet session is in progress.  
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Plug Indicators and Manual Control Buttons: An  
On/Off Indicator and Manual Control Button for each  
switched plug. To manually switch a plug "On" or "Off",  
press and hold the appropriate Manual Control Button for  
one second; the corresponding plug will be toggled  
On or Off.  
Note: If desired, the Manual Control Buttons can  
also be disabled as described in Section 5.4.  
 
2.2. Back Panel  
Bus 2 (Plug 2): Includes the following components:  
À
A) Power Inlet: Supplies power for Bus 2.  
B) Circuit Breaker: 115 VAC, 20 Amps  
C) Switched Outlet: Each bus can switch up to 20 Amps.  
Bus 1 (Plug 1): Same as Item 1 above, except the Bus 1  
Power Inlet supplies power to Bus 1.  
Á
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Network Port and Activity Indicator: A 10BaseT, RJ45  
Ethernet port for connection to your TCP/IP network. To  
communicate via Network, you must first specify network  
parameters as described in Section 5.6.  
Note: The NPS-2HD features a 10BaseT interface. When  
connecting the NPS to a 100BaseT interface, note that  
most 100BaseT router switches will autosense to determine  
if the device is 100BaseT or 10BaseT and then configure  
the network interface accordingly. If your router switch  
does not autosense, then the network interface port must be  
manually set to 10BaseT.  
Modem Port: A Male RS-232, DB9 Connector, DTE  
configuration. For connection to an external modem.  
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Console Port: A Male RS-232, DB9 Connector, DTE  
configuration. For connection to a local PC.  
Option Switches: A bank of four DIP Switches which  
select default settings for the baud rate and other features.  
Default Button: Used in conjunction with the Reset  
Button to reset the unit to defaults (see Section 4.3.)  
Reset Button: Used in conjunction with the Default  
Button to reset the unit to defaults (see Section 4.3.)  
 
3. Quick Start Guide  
This section provides a brief overview of basic NPS-2HD  
capabilities, and describes a simple test that can be performed to  
determine if the unit is operating properly and demonstrate basic  
communication capabilities.  
Note that this Quick Start procedure is included only to provide a  
quick demonstration of basic NPS-2HD capabilities. In order to  
take full advantage of the complete range of features provided by  
this unit, it is strongly recommended that you should complete  
the entire Installation and Configuration sections after  
completing the Quick Start procedure.  
1. Apply Power to the NPS-2HD: Connect the NPS-2HD to  
an appropriate power source. Prior to connecting the unit  
to your power supply, make certain to review the safety  
precautions listed at the beginning of this User's Guide and  
the cable clamp installation instructions in Section 4.1.  
2. Connect a PC to the NPS-2HD: Attach a standard null  
modem cable from your PC COM port to the Console Port  
connector on the NPS back panel. For a description of the  
port interface, please refer to Appendix A.  
Note: When the NPS-2HD is shipped from the  
factory, Console Port communication parameters are  
set as follows: 9600 bps, 8 Data Bits, One Stop Bit,  
No Parity. Although the NPS-2HD allows these  
parameters to be easily redefined, for this Quick  
Start procedure, it is recommended that you  
configure your communications program to accept  
these default parameters.  
3. Access the Command Mode: Start your communications  
program and then press [Enter]; the System Help Screen  
should be displayed (Figure 3.1) and the NPS command  
prompt should appear. For more information on command  
mode access, please refer to Section 5.2.  
 
4. Configure Network Port: In order to allow  
communication with the NPS-2HD via the Network Port,  
you must first define the IP Address, Subnet Mask, and  
Gateway Address. At the NPS command prompt, type /N  
and press [Enter] to display the Network Parameters  
menu.  
a) Settings for network parameters will depend on the  
configuration of your individual network. Please  
contact your network administrator in order to  
determine the appropriate settings for the IP Address,  
Subnet Mask, and Gateway Address.  
b) To assign network parameters, key in the number for  
the desired parameter, press [Enter], and then follow  
the instructions in the resulting submenu. For  
example, to define the IP Address, type 1 and  
press [Enter].  
 
5. Exit Command Mode: When you have finished setting  
Network Parameters, type /X and press [Enter] to exit the  
command mode at the Console Port.  
Note: Only one port may access the NPS command  
mode at a given time. In order to allow access to the  
NPS unit via other ports, always exit from the  
command mode when you are finished  
communicating with the unit.  
6. Connect Network Cable: Connect your network interface  
to the NPS-2HD Network Port. The Network Port is an  
RJ45, 10BaseT Ethernet jack, for connection to a TCP/IP  
network.  
Note: The NPS-2HD features a 10BaseT Interface.  
When connecting to a 100BaseT interface, note that  
most router switches will autosense to determine if  
the device is 100BaseT or 10BaseT, and then  
configure the network interface accordingly. If your  
router switch does not autosense, then the network  
interface port must be manually set to 10BaseT.  
7. Network Access: Telnet to the NPS's IP address. For  
example, if the IP address is "119.1.1.1", on a UNIX  
system the Telnet command would be invoked as follows:  
$ telnet 119.1.1.1 [Enter]  
After the Telnet connection is established, the NPS should  
display the System Help Screen and the NPS command  
prompt should appear, indicating that you have  
successfully accessed the NPS Command Mode via the  
Network Port.  
 
8. Test Boot Commands: When the NPS-2HD is powered  
up, both switched plugs will be set in the ON position. In  
order to test for proper operation, you may wish to perform  
the following test. Note that it is not necessary to connect  
a device to either switched outlet in order to perform  
this test.  
a) Reboot Plugs: To initiate a boot cycle at both plugs,  
go to the NPS command prompt and type /BOOT *  
and press [Enter]. Power to both plugs will be  
switched OFF. After the Boot Delay Period (Default =  
5 Seconds), the power to both plugs will then be  
automatically switched back ON. Note that the Plug  
Status Indicators on the NPS-2HD front panel will also  
switch Off and On.  
b) Switch Plugs OFF: To switch both plugs OFF, go to  
the NPS command prompt, type /OFF * and then  
press [Enter]. Power to both plugs will be switched  
OFF. Note that the Plug Status Indicators will also be  
switched Off.  
c) Switch Plugs ON: To switch both plugs ON, go to the  
NPS command prompt, type /ON * and then press  
[Enter]. Power to both plugs will be switched ON.  
Note that the Plug Status Indicators will also be  
switched On.  
9. Exit Command Mode: Type /X and press [Enter] to exit  
from the NPS Command Mode, or disconnect using your  
Telnet program.  
This completes the introductory overview of the NPS-2HD.  
Prior to installing and operating the unit, please review the  
remainder of this User's Guide for important information  
regarding safety considerations, as well as more detailed  
installation, configuration, and operation instructions.  
 
4. Installation  
4.1. Power Connection  
Note that the NPS-2HD features two separate 20 amp buses. In  
order for both buses to function, power must be connected to  
both input connectors on the unit's back panel.  
Prior to connecting power supply cables to the unit, please refer  
to the cautions below, and the cable clamp installation  
instructions in Sections 4.1.1 and 4.1.2.  
CAUTIONS:  
This device should only be operated with the  
type of power source indicated on the  
instrument nameplate. If you are not sure of the  
type of power service available, please contact  
your local power company.  
Reliable earthing (grounding) of this unit must  
be maintained. Particular attention should be  
given to supply connections when connecting to  
power strips, rather than directly to the branch  
circuit.  
"Always On" Architecture: The NPS-2HD features "Always  
On" architecture. This means that once the NPS-2HD is  
connected to your power supply, both plugs will always be set in  
the ON state, unless program commands or the Manual Control  
Buttons have been used to switch the plug(s) to the OFF state.  
4.1.1.  
Cable Clamp Installation  
CAUTIONS:  
Make certain that the unit is disconnected from  
the power source before beginning this  
procedure.  
In order to reduce the chance of injury due to  
electric shock, the Output Cables should be  
installed before the Input Cables.  
 
4.1.2.  
Output Cable Clamp  
1. Loosen Screws: Locate the two screws which secure each  
output jack to the NPS-2HD back panel. Carefully loosen  
each screw to provide sufficient room for the cable clamp  
to be attached after it is fitted to the cable.  
Note: Make certain to loosen the screws enough to  
allow the cable clamp to be installed, but do not  
entirely remove the screws from the NPS  
back panel.  
2. Connect Plug: Plug the power cable from your AC  
powered device into the output jack. Make certain that the  
plug is firmly seated. Note that the total load for each  
outlet must not exceed 20 amps.  
3. Fit Clamp to Plug: Carefully slip the output cable clamp  
(See Figure 4.1) over the output plug, making certain that  
the two slots at the base of the clamp are properly seated  
over the screws which secure the output jack to the back  
panel. The U-shaped cutout, located at the back of the  
clamp, should face downwards in order to allow the clamp  
to fit over the cable.  
4. Tighten Screws: Tighten the screws which secure the  
output cable clamp to the output jack.  
 
4.1.3.  
Input Cable Clamp  
1. Loosen Screws: Locate the two screws which secure each  
input jack to the NPS-2HD back panel. Carefull loosen  
each screw to provide sufficient room for the input jack  
clamp to be attached.  
Note: Make certain to loosen the screws enough to allow  
the clamp to be installed, but do not entirely remove the  
screws from the NPS back panel.  
2. Attach Clamp to Jack: Slip the input clamp into place,  
making certain that the screw slots in the base of the clamp  
are securely seated over the screws which secure the input  
jack to the back panel. Make certain to position the clamp  
so the retaining screw (see Figure 4.2) is facing upwards.  
Tighten the screws to secure the clamp to the input jack.  
3. Connect Plug: Slide the input plug into the cable clamp.  
If necessary, loosen the retaining screw to provide room  
for the plug. Make certain that the plug is firmly seated in  
the jack, and then tighten the retaining screw to secure the  
clamp to the cable.  
 
4.2. Option Switches  
The Option Switches select default settings for the Baud Rate,  
Command Echo, Boot Delay and Disconnect Timeout. Default  
settings selected via the Option Switches will be used when the  
unit is reset to default parameters as described in Section 4.3.  
Notes:  
Although the Option Switches select default  
settings for these features, the NPS-2HD  
configuration menus can also be used to select  
operating parameters as described in Section 5.  
If Option Switch settings are changed, the new  
settings will not be applied until the unit is reset  
as described in Section 4.3.  
Option Switch settings are described below:  
Baud Rate: The default baud rate for the Console Port and  
Modem Port.  
Boot Delay: The default Boot Delay setting. When a boot cycle  
is initiated, the Boot Delay determines the length of time that  
the switched outlet will remain off until power is restored.  
Command Echo: The default setting for the Command Echo for  
the Console Port, Modem Port and Network Port. When  
enabled, commands entered at your keyboard will be sent to  
the NPS and echoed back to your display monitor.  
Disconnect Timeout: The default Disconnect Timeout value.  
This determines how long the NPS will wait for additional  
commands before automatically disconnecting. Note that  
when the NPS times out, DTR will drop, and the modem  
disconnect and initialize strings will be sent.  
Switch Function  
Up  
Down  
* = Factory Setting  
 
4.3. Reset Unit to Defaults  
If Option Switch settings are changed, the new settings will not  
be applied until the unit is reset to default settings. There are  
two ways to reset the unit to defaults:  
Note: When these reset procedures are performed,  
all user selected parameters, including passwords  
and port names will be lost. Prior to performing  
these reset procedures, it is strongly recommended  
to save configuration parameters to an ASCII text  
file as described in Section 7.  
4.3.1.  
Default Button / Reset Button (Local)  
Typically, this method is used when you have immediate access  
to the installation site.  
1. Simultaneously press the DEFAULT and RESET buttons,  
located on the NPS-2HD Back Panel.  
2. Release the RESET button, wait for approximately five  
seconds, and then release the DEFAULT button.  
4.3.2.  
Default Parameters Option  
To reset the unit to default parameters using the General  
Parameters Menu's "Default Parameters" option, proceed  
as follows. Note that this method requires that you have already  
connected a local or remote PC to the unit and have accessed the  
command mode.  
1. Access the NPS Command Mode (see Section 6.1).  
2. At the NPS> command prompt, type /G and press [Enter].  
The General Parameters menu will appear.  
3. From the General Parameters menu, type A and press  
[Enter]. If command confirmation is enabled, the unit  
will display a "Sure?" prompt. Type Y and press [Enter]  
to proceed with the reset procedure. After a brief pause,  
parameters will be reset to default values.  
Note: If the Default Parameters function is invoked  
via the Network Port, the IP Address will not be  
reset. If this function is invoked via the Console  
Port or Modem Port, the IP Address will be reset.  
 
4.4. Console Port Connection  
The Console Port is a male, DB9 connector, wired in a DTE  
configuration (similar to an AT computer), which is used for  
connection to a local PC or control device. Appendix A  
describes the Console Port interface.  
4.5. Connecting an External Modem  
When connecting directly to an external modem, use a standard  
DB9 AT to Modem cable. Section 5.4 describes the procedure  
for defining the modem command strings. Appendix A describes  
the modem port interface.  
4.6. Connecting the Network Cable  
The Network Port is an RJ45 Ethernet jack, for connection to a  
TCP/IP network. Connect your 10Base-T cable to the Network  
Port. Before attempting to access the unit via network, please  
assign the IP Address, Gateway Address and Subnet Mask as  
described in Section 5.6.  
Note: The NPS-2HD features a 10BaseT interface.  
When connecting the NPS to a 100BaseT interface,  
note that most router switches will autosense to  
determine if the device is 100BaseT or 10BaseT and  
then configure the network interface accordingly. If  
your router switch does not auto-configure for  
10BaseT vs. 100BaseT, then the network interface  
port must be manually set to 10BaseT.  
 
5. Configuration  
5.1. System Mode and User Mode  
In order to restrict access to sensitive command functions, the  
NPS-2HD features two separate operating modes; System Mode  
and User Mode.  
The System Mode allows access to all configuration menus,  
command functions and status screens. When the System Mode  
is active, Boot/On/Off commands can always be directed to  
either of the two switched outlets, even if each plug has been  
assigned a separate password. The System Mode Status Screen  
shows On/Off conditions for both switched outlets, and lists  
currently defined system parameters.  
The User Mode allows limited access to command functions and  
status screens; users are not allowed to access configuration  
menus. When the User Mode is active, Boot/On/Off commands  
can only be directed to the specific outlet(s) allowed by the User  
Password entered at login. If a different User Password is  
assigned to each NPS outlet, then a user who accesses the NPS  
using the password for Plug 1 is not allowed to boot or switch  
Plug 2. On the other hand, if the same User Password is assigned  
to both NPS outlets, then that user will be able to direct  
commands to both plugs. The User Mode Status Screen only  
shows conditions at the outlet(s) owned by the User Password;  
system parameters are not displayed.  
When properly configured, the NPS will display a password  
prompt when the unit is contacted via the Console Port, Modem  
Port or Network Port. The password entered at this prompt  
determines whether the unit will start-up in System Mode or User  
Mode. If the System Password (defined via the General  
Parameters menu) is entered, the System Mode will be active. If  
the User Password (defined via the Plug Configuration Menus) is  
entered, the User Mode will be active.  
If the System Password is not defined, the NPS-2HD will not  
display the password prompt, and will always start-up in System  
Mode. Once the System Password has been defined, individual  
users can be granted access by assigning passwords to the NPS's  
two switched plugs as described in Section 5.5.  
 
5.2. Communicating with the NPS  
In order to configure the unit or invoke command functions, the  
user must first connect to the NPS and access the command  
mode.  
1. The NPS-2HD is transparent to parity and will accept 7 or  
8 bit characters, but will always answer back at 8 bits, no  
parity. Make certain your communication program (e.g.  
ProComm or HyperTerminal) is set for the appropriate  
baud rate, bits and parity.  
a) Via Modem: Start your communications program.  
Dial the external modem connected to the NPS. Wait  
for the Connect message and proceed to Step 2.  
b) Via Local PC: Start your communications program  
and then press [Enter].  
c) Via Network: During initial configuration, the NPS  
cannot be accessed via the Network Port. After  
network parameters have been defined (see  
Section 5.6), the unit may then be accessed via network  
as described in Section 6.1.  
Note: Only one port can access the command mode  
at a given time. When communicating via the  
Console Port or Modem Port, always make certain to  
disconnect (using the /X command) when you have  
finished. If the Console Port or Modem Port are  
busy, you will not be able to access the command  
mode via the Network Port. For more information,  
please refer to Section 6.8.  
2. Password: If the System Password has been defined, the  
unit will display the Password Prompt. Key in either the  
System Password or User Password, and press [Enter]. If  
the system password has not been defined, the prompt will  
not be displayed. Note that the Password feature is case  
sensitive.  
3. If the System Password is entered, the NPS-2HD will  
display the System Help Screen (Figure 5.1). If the User  
Password is entered, the NPS will display the User Help  
Screen (Figure 5.2).  
 
 
5.3. NPS Command/Menu Conventions  
When invoking NPS-2HD commands and selecting items from  
configuration menus, note the following:  
· To display the Help Screen, type /H [Enter].  
· All NPS commands can be invoked at the NPS> command  
prompt, or from the General Parameters Menu, Port  
Parameters Menus or Network Parameters Menu.  
· NPS commands are not case sensitive. All NPS commands  
are invoked by pressing [Enter].  
· To select an item from an NPS menu, key in the number for  
the item and press [Enter]. To exit from a menu, press  
[Esc] at any time. Parameters defined up to that point will  
be saved.  
· The ",Y" option can temporarily suppress the "Sure?"  
confirmation prompt. The ",Y" option is entered at the end  
of the command line, immediately following the command  
or argument. For example, to reset the network port without  
displaying the "Sure?" prompt, type /T,Y [Enter].  
5.4. Defining General Parameters  
When the "NPS>" prompt appears, type /G [Enter] to display  
the General Parameters menu (Figure 5.3). Note that this menu  
is not available in User Mode. The General Parameters menu  
offers the following options:  
1. System Password: (Up to 16 characters, case-sensitive)  
When the System Password is defined, the NPS-2HD will  
display a prompt before allowing access to command  
mode. If the System Password is entered, the NPS will  
start-up in System Mode. To define the System Password,  
type 1 and press [Enter]. (Default = undefined).  
Note: If the System Password is not defined, the  
password prompt will not be displayed, and the NPS  
will always start-up in System Mode.  
2. Site ID: Defines a text string (up to 32 characters) that  
denotes the installation site. To define the Site ID, type 2  
and press [Enter]. (Default = undefined).  
 
3. Modem Initialization String: To define the Modem  
Initialization String (up to 32 characters), type 3 and  
press [Enter]. For more information on the initialization  
string, please refer to the user's guide for your external  
modem. Make certain that the modem is set to auto-  
answer in one ring. (Default = ATE0M0Q1&C1&D2S0=1).  
4. Modem Disconnect String: To define the Disconnect  
String (up to 32 characters), type 4 press [Enter], and  
follow the instructions in the submenu. For more  
information, please refer to the user's guide for your  
external modem. (Default = undefined).  
5. Baud Rate: To select the baud rate for the Modem Port  
and Console Port, type 5 press [Enter], and follow the  
instructions in the submenu. Make certain to select a rate  
that is compatible with the external modem, and/or the  
device connected to the Console Port. (Default value  
determined by Option Switch 1; Factory Setting = 9600).  
Note: When this setting is changed, the new baud  
rate will not be applied until the user exits and then  
re-enters the NPS Command Mode.  
6. Command Echo: Enables/Disables the command echo.  
When enabled, commands sent to the NPS will be echoed  
back to your PC, allowing keystrokes to be displayed . To  
enable/disable the echo, type 6, press [Enter] and follow  
the instructions in the submenu. (Default determined by  
Option Switch 3; Factory Setting = Disabled).  
 
7. Disconnect Timeout: Determines how long the NPS-2HD  
will wait for additional commands. Type 7, press [Enter],  
and follow the instructions in the submenu. (Default  
determined by Option Switch 4; Factory Setting = 2 Min.).  
Note: It is recommended that the Disconnect  
Timeout should be set at the lowest acceptable  
value. Since only one port is allowed to access the  
command mode at a given time, shorter timeout  
values will decrease the chance of other users being  
shut out of command mode if a user fails to  
disconnect when finished communicating with  
the unit.  
8. Command Confirmation: When enabled, the NPS-2HD  
will display a "Sure?" prompt before completing the /T, /X,  
/R, /BOOT, /ON, /OFF, /D and "A" commands, and will  
also display the System Status screen after commands are  
successfully completed. When disabled, the "Sure?"  
prompt is suppressed, and the Status Screen is not sent  
when commands are complete. (Default = Enabled).  
9. Automated Mode: When enabled, the NPS will execute  
the /ON, /OFF, /BOOT, /D, and /X commands without  
displaying the confirmation prompt, status screen, or  
confirmation messages. This allows the NPS to be  
controlled by a device that generates commands to control  
power switching without human interaction. For more  
information, please refer to Section 6.5. (Default = Off).  
Note: When this option is enabled, NPS password  
security functions are disabled, and users are able to  
access System Level menus and control both plugs  
without entering a password.  
10. Button Mode: Enables/disables the manual plug control  
buttons on the NPS-2HD front panel. When enabled, the  
NPS's two switched plugs can be toggled On and Off by  
pressing and holding the manual control button for  
approximately one second. When disabled, the manual  
control buttons will have no effect. (Default = On).  
 
A. Default Parameters: Resets the NPS to the default values  
specified by the Option Switches. In addition, all menu  
selected parameters, including port names and passwords,  
will be lost. Note that if Command Confirmation is  
disabled, the "Sure?" prompt will not be sent.  
Note: If the Default Parameters function is invoked  
via the Network Port, the IP Address is not reset. If  
this function is invoked via the Console Port or  
Modem Port, the IP Address will be reset.  
After defining the General Parameters, press [Esc] to exit from  
the General Parameters menu.  
5.5. Plug Parameters  
The Plug Parameters menus are used to assign names and select  
parameters for each of the two switched outlets. There is a  
separate Plug Parameters menu for each outlet. Note that the  
Plug Parameters menus are not available in User Mode.  
In addition to selecting parameters for each outlet, the Plug  
Parameters menus also allow you to assign an individual User  
Password to each plug. If the same User Password is assigned to  
both plugs, then that password will allow the user to direct  
Boot/On/Off commands to both switched plugs. If a different  
password is assigned to each plug, then each password will only  
allow access to it's corresponding plug.  
To access the Plug Parameters menus from the NPS> prompt,  
type /P n and press [Enter] where n is the number or name of  
one of the two switched outlets. The Plug Parameters menu  
(Figure 5.4) offers the following options:  
1. Plug Name: (Up to 16 Characters) Assigns a name to the  
plug. Typically, this name describes the piece of  
equipment that is connected to the switched outlet. When  
plug names are assigned, Boot/On/Off commands can be  
invoked using the name or number of the desired plug.  
(Default = undefined).  
 
2. Password: (Up to 16 Characters) Assigns a User  
Password to this plug. When a User Password is assigned,  
the plug is then "owned" by that password. When a User  
Password is entered at login, the user will have access to  
only the plug(s) which are owned by this password.  
(Default = undefined).  
Notes:  
· If you wish to allow a single user to access both  
switched plugs, assign the same User Password to  
both plugs.  
· If the System Password is defined, and the plug's  
User Password is not defined, then the System  
Password will "own" this plug, and only the  
System Mode will be able to control the plug.  
3. Boot Delay: During a Boot cycle, power to the plug is  
first switched off and then switched back on. The Boot  
Delay is the length of time which elapses between the time  
when power is switched off and the time that power is  
restored. The Boot Delay can be 1, 5, 10, 15, 30 or 60  
seconds. (Default determined by Option Switch 2; Factory  
Setting = 5 Seconds).  
4. Power-Up Default: Determines how this plug will react  
when the /D (default) command is invoked, or after a  
power interruption. Each plug can be automatically  
switched On or Off as specified by the Power-Up Default.  
(Default = On).  
After Plug Parameters have been defined, press [Esc] to exit  
from the Plug Parameters menu.  
 
5.6. Network Parameters  
In order to communicate with the NPS-2HD via network, the IP  
Address, Subnet Mask and Gateway Address must first be  
defined using the Network Parameters menu. If desired, this  
menu also allows you to implement IP Security features, which  
restrict command mode access based on the user's IP Address.  
Settings for network parameters depend upon the configuration  
of your individual network. Please contact your network  
administrator for appropriate settings, and then assign parameters  
as described in this section.  
To access the Network Parameters menu (Figure 5.5), type /N  
and press [Enter]. Note that this menu is not available in User  
Mode. The following options are available:  
1. IP Address: Defines the IP Address for the NPS unit.  
Type 1 press [Enter], and follow the instructions in the  
submenu. (Default = undefined)  
2. Subnet Mask: Defines the Subnet Mask for the NPS unit.  
Type 2 press [Enter], and follow the instructions in the  
submenu. (Default = undefined)  
3. Gateway Address: Defines the Gateway Address for the  
NPS unit. Type 3 press [Enter], and follow the  
instructions in the submenu. (Default = undefined)  
4. IP Security: Sets up the IP Security feature as described  
in Section 5.6.1.  
5. Mac Address: Displays the unit's MAC Address. Note  
that this item is not used to redefine the MAC Address.  
 
5.6.1.  
Implementing IP Security  
The NPS-2HD can be configured to restrict unauthorized IP  
addresses from Telneting to the unit. This allows the user to  
grant Telnet access to only a specific group of IP addresses, or  
block a particular IP address from gaining access. In the default  
state, the NPS accepts incoming IP connections from all hosts.  
To configure the IP Security feature, proceed as follows:  
1. Access the Network Parameters menu as described in  
Section 5.6. Note that the Network Parameters menu is  
not available in User Mode.  
2. When the Network Parameters menu appears, type 4 and  
press [Enter] to access the IP Security menu (Figure 5.6).  
3. The IP Security menu lists five IP Security "masks" along  
with the selected permit/deny action for each mask.  
a) Each Security Mask prompt is used to define a specific  
IP address or range of IP addresses. Each Mask Action  
prompt is used to define the permit/deny action for the  
corresponding Mask.  
b) Masks are listed in order of ascending priority; Mask 1  
has the lowest priority, Mask 5 has the highest priority.  
c) Masks have a cumulative effect; high priority masks  
supersede the effect of lower priority masks.  
d) Each IP Address consists of a series of four eight bit  
numbers. The number 255 is used as a wild card.  
 
Example 1: Deny access to all hosts except 192.1.1.5:  
Since 255 is a wild card, Mask #1 blocks all IP Addresses. Mask  
#2 then specifically grants access to 192.1.1.5 only.  
Example 2: Allow access only by addresses that begin with 192.  
Since 255 is a wild card, Mask 1 blocks all IP addresses. Mask 2  
then grants access to all addresses that begin with 192.  
Example 3: Allow access only by addresses that begin with 192,  
deny access to 192.1.1.5.  
Since 255 is a wild card, Mask 1 blocks all IP addresses. Mask 2  
then grants access to all addresses that begin with 192. Finally,  
Mask 3 specifically blocks access by 192.1.1.5.  
Note:  
· Mask #5 has priority over the other four masks. If  
Mask #5 is set to deny access by  
"255.255.255.255" (all wild cards), all IP  
Addresses will be blocked, and you will not be able  
to access the NPS Command Mode via network.  
Access will only be allowed via the Console Port  
or Modem Port.  
· When using the wild card address  
"255.255.255.255" to block access by all IP  
Addresses, make certain that at least one higher  
priority mask permits access by your IP address.  
 
5.7. Save Configuration Parameters  
After the unit has been completely configured, it is recommended  
to save parameters to an ASCII file as described in Section 7.  
This allows quick recovery in the event that the unit is reset to  
default parameters, or the configuration is accidentally deleted or  
altered.  
 
6. Operation  
6.1. Access the NPS-2HD Command Mode  
Commands can be sent to the NPS-2HD via Network or modem,  
or from a local PC connected to the Console Port. To access the  
Command Mode, proceed as follows:  
Note: Only one port can access command mode at a  
given time. When you have finished communicating  
with the unit, always make certain to disconnect  
using the /X command. When the Console Port or  
Modem Port are busy, you will not be able to access  
the command mode via the Network Port. For more  
information, please refer to Section 6.8.  
1. Contact the NPS:  
a) Via Network: Telnet to the NPS unit's IP Address.  
For example, if the IP Address is 192.1.1.1, on a UNIX  
system the Telnet command would be as follows:  
$ telnet 192.1.1.1 [Enter]  
Notes:  
· In order to contact the NPS via telnet, you must  
first define the unit's Network Parameters as  
described in Section 5.6.  
· If the Telnet connection to the NPS is refused, this  
may mean that the unit is busy, or that the IP  
Security feature has denied the connection.  
b) Via Modem: Start your communications program (e.g.  
HyperTerminal). Dial the external modem connected  
to the NPS, then wait for the Connect Message.  
c) Via Console Port: Start your communications  
program and press [Enter].  
2. Password: If the System password has been defined, a  
prompt will be displayed. Key in your System or User  
Password, and press [Enter].  
3. Disconnect: To end the session, type /X and press  
[Enter] (or disconnect using Telnet software).  
 
6.2. Displaying Plug Status  
The Status Screen displays the On/Off state and selected  
parameters for the switched plugs. To display the Status Screen,  
type /S and press [Enter]. Note that although the /S command  
is available in both User and System Mode, the System Status  
Screen includes more information than the User Status Screen.  
When the System Mode is active, the /S command will produce  
the screen shown in Figure 6.1, which lists status and parameters  
for both switched plugs, along with Console Port parameters, and  
modem command strings. Note that in System Mode, the /S  
command will also accept an argument which will display the  
User Password for each plug. To display plug passwords, access  
the System Mode, type /SP and press [Enter].  
When the User Mode is active, the /S command will produce a  
different version of the status screen, which lists the status and  
parameters only for the plug(s) owned by the User password  
entered at login. If a separate User Password has been assigned  
to the other plug, the User Mode Status Screen will not list the  
status for that plug. In User mode, plug passwords cannot be  
displayed.  
 
6.3. Boot/On/Off Commands  
These commands are used to Boot or toggle the On/Off status of  
the NPS's two switched plugs. If the same password has been  
applied to both switched plugs, commands can be directed to  
Plug 1, Plug 2, or both switched plugs. If a separate User  
Password has been assigned to each plug, then commands can  
only be applied to the plug that is owned by the User Password  
entered at log in. Plugs may be specified by name or number.  
Notes:  
· When User Mode is active, commands will only be  
applied to plugs owned by the User's password.  
· To apply a command to both outlets, enter an  
asterisk (*) in place of the plug number or name.  
Commands can only be applied to both plugs when  
the unit is operating in System Mode, or when both  
plugs are owned by the same User Password.  
· When commands are applied to both plugs, the  
NPS will delay for approximately 1 second  
between actions. For example, when switching  
both plugs On, the NPS will switch Plug 1 On,  
delay one second, then switch Plug 2 On.  
· Wait for the "NPS>" prompt to appear before  
entering commands. The prompt will not reappear  
until the previous command is complete.  
· Commands are not case sensitive. All commands  
are invoked by pressing [Enter].  
· If command confirmation is enabled, the NPS will  
display the Status Screen after the Boot/On/Off  
commands are successfully completed.  
1. Boot Plug(s): To initiate a Boot cycle, type /BOOT n and  
press [Enter]. Where "n" is a the number or name of the  
desired plug. Note that the "/BOOT" command can also be  
entered as "/BO".  
Examples:  
· To boot both plugs, type /BOOT * or /BO * and then  
press [Enter].  
· To boot plug 1, type /BOOT 1 or /BO 1 and then  
press [Enter].  
 
2. Switch Plug(s) On: To power-on a plug, type /ON n and  
press [Enter]. Where "n" is the number or name of the  
desired plug.  
Examples:  
· To power-on both plugs, type /ON * and press [Enter].  
· To power-on Plug One, type /ON 1 and press [Enter].  
3. Switch Plug(s) Off: To power-off a plug, type /OFF n  
and press [Enter]. Where "n" is the number or name of  
the desired plug. Note that the "/OFF" command can also  
be entered as "/OF".  
Examples:  
· To power-off both plugs, type /OFF * or /OF * and  
press [Enter].  
· To power-off a plug named POWER2, type  
/OFF POWER2 or /OF POWER2 and press [Enter].  
4. Suppress Command Confirmation Prompt: To execute a  
Boot/On/Off command without displaying the "Sure?"  
prompt, include the ",Y" option in the command line. The  
",Y" option is entered immediately following the  
command argument.  
Examples:  
· To boot both plugs without displaying the "Sure?"  
prompts, type /BOOT *,Y or /BO *,Y and then  
press [Enter].  
· To power-off a plug named POWER1 without displaying  
the "Sure?" prompt, type /OFF POWER1,Y or  
/OF POWER1,Y and then press [Enter].  
 
6.4. The Default Command  
The Default Command (/D) sets plugs to their default On/Off  
status. The default status is set using the Plug Parameters menus  
described in Section 5.5. To set plugs to defaults, type /D and  
press [Enter].  
Note:  
· When User Mode is active, this command will only  
be applied to the plug owned by the User's  
password. The command will not be applied to a  
plug that is owned by another User Password.  
· When the System Mode is active, this command  
will be applied to both plugs.  
· This command will always be applied to all owned  
plugs. It cannot be directed only to a specific plug.  
6.5. The Automated Mode  
The Automated Mode allows the NPS-2HD to perform  
On/Off/Boot/Default/Exit commands, without displaying menus  
or generating response messages. Automated Mode is designed  
to allow the NPS to be controlled by a computer (or another  
automatic system) which can generate commands to control  
power switching functions without human intervention.  
When the Automated Mode is enabled, the /ON, /OFF, /BOOT,  
/D and /X commands are executed without a "Sure?"  
confirmation prompt and without command response messages;  
the only reply to these commands is the "NPS>" prompt, which is  
displayed when the command is complete.  
Note: When Automated Mode is enabled, all NPS  
password security functions are disabled, and users  
are able to access System Level command functions  
(including the configuration menus), and control  
both plugs without entering a password. If you need  
to enable the Automated Mode, but want to restrict  
network access to NPS configuration menus, it is  
recommended to enable and configure the IP  
Security Function as described in Section 5.6.1.  
 
To enable/disable the Automated Mode, access the NPS General  
Parameters menu, and proceed as described in Section 5.4.  
When the Automated Mode is enabled, NPS functions will  
change as follows:  
1. All Password Security Suppressed: When a user  
attempts to access the NPS command mode, the password  
prompt will not be displayed at either the Network Port,  
Modem Port, or Console Port. Unless restricted by the IP  
Security Function, all users will be allowed to access  
System Level command functions and control both plugs.  
At the Console Port, all commands are immediately  
accepted, whether the port is awake or asleep.  
2. Status Screen Suppressed: The status screen will not be  
automatically displayed after commands are successfully  
executed. Note however, that the /S command can still be  
invoked to display the status screen as required.  
3. "Sure?" Prompt Suppressed: All commands are  
executed without prompting for user confirmation.  
4. Error Messages Suppressed: If the [Enter] key is  
pressed without entering a command, the NPS will not  
respond with the "Invalid Command" message. Note  
however, that an error message will still be generated if  
commands are invoked using invalid formats or arguments.  
All other status display and configuration commands will still  
function as normal.  
 
6.6. Other Commands  
6.6.1.  
Login as Different User  
The /R command is used to re-login using a different password.  
When invoked, the NPS will display the password prompt,  
allowing the user to enter a different password in order to access  
the other plug or System Level command functions. The /R  
command is typically used to switch from User Mode to  
System Mode.  
The /R command is available in both System Mode and User  
Mode. To login as a different user, type /R, press [Enter], and  
then key in a different valid password at the prompt. To  
suppress the "Sure?" prompt, type /R,Y [Enter].  
6.6.2.  
Reset Network Port  
The /T command is used to reinitialize the NPS Network card.  
The /T command is not available in User Mode. To reset the  
Network Port, type /T and press [Enter]. To suppress the  
"Sure?" prompt, type /T,Y [Enter].  
Note: The /T command can only be issued via the  
Console Port or Modem Port. The /T command  
cannot be invoked via the Network Port.  
6.6.3.  
Exit / Disconnect  
To exit from the NPS Command Mode and discontinue  
connection to the unit, type /X and press [Enter]. The NPS will  
display the "DISCONNECT" message. To suppress the "Sure?"  
prompt, type /X,Y [Enter].  
Note: Only one port may access the NPS command  
mode at any given time. In order to allow access to  
the NPS unit via other ports, always exit from the  
command mode when you are finished  
communicating with the unit. For more information,  
please refer to Section 6.8.  
 
6.7. Manual Operation  
In addition to the command driven functions, the NPS's two  
switched plugs can also be toggled On and Off manually. To  
manually toggle a plug On or Off, press the appropriate Manual  
Control Button, and hold it down for approximately one second;  
the corresponding plug will be toggled On or Off. Note that if  
desired, the Manual Control Buttons can also be disabled via the  
General Parameters menu as described in Section 5.4.  
6.8. Operating Tips  
When connecting to the NPS-2HD via network, modem or  
console port, the following factors should be kept in mind:  
1. One Connection at a Time: Only one port can access the  
command mode at a time. Therefore, it is recommended  
that users should always disconnect using the /X command  
when finished communicating with the unit. When a  
command port is busy, the NPS-2HD will react as follows:  
a) Network Port Busy: If a second user attempts to  
connect via the Modem Port, the NPS will send a busy  
message. If a second user attempts to connect via the  
Console Port, the port will not wake.  
b) Modem Port Busy: If a second user attempts to  
connect via the Network Port, the connection will be  
refused. If a second user attempts to connect via the  
Console Port, the port will not wake.  
c) Console Port Busy: If a second user attempts to  
connect via the Network Port, the connection will be  
refused. If a second user attempts to connect via the  
Modem Port, the Console Port will disconnect and the  
Modem Port will be granted access; the Modem Port  
has priority over the Console Port.  
2. Ping Packet Size: The NPS will not accept Ping Packets  
larger than approximately 1000 bytes.  
If you have any questions regarding configuration or operation of  
the NPS, please contact WTI Technical Support as described in  
Appendix C.  
 
7. Saving and Restoring  
Configuration Parameters  
After the NPS-2HD has been properly configured, parameters  
can be downloaded and saved as an ASCII text file. Later, if the  
configuration is accidentally altered, the file with the saved  
parameters can be uploaded to automatically reconfigure the unit  
without the need to manually assign each parameter.  
Saved parameters can also be uploaded to other NPS-2HD units.  
This allows rapid set-up when several units will be configured  
with the same parameters.  
The "Save Parameters" procedure can be performed from any  
terminal emulation program (e.g. ProComm, Crosstalk,  
Hyperterminal, etc.), which allows downloading of ASCII files.  
7.1. Sending Parameters to a File  
1. Start your communications program and access the  
NPS-2HD command mode using the System Level  
Password.  
2. When the NPS command prompt appears, type /DL and  
press [Enter]. The NPS will prompt you to prepare your  
communications program. Set up your communications  
program to receive an ASCII download, and specify a  
name for the file that will receive the saved parameters  
(e.g. NPS.PAR).  
3. When the communications program is ready to receive the  
file, return to the NPS command mode, and press [Enter]  
to proceed.  
4. The NPS will send a series of ASCII command lines which  
specify the currently selected NPS parameters.  
 
7.2. Restoring Saved Parameters  
This section describes the procedure for using ProComm to send  
saved parameters to the NPS-2HD.  
1. Start your communications program and access the NPS  
command mode using the System Level Password.  
2. Configure your communications program to upload an  
ASCII text file.  
3. Upload the file with the saved parameters. If necessary,  
key in the file name and directory path.  
4. When the upload is complete, make certain to terminate  
the communications program's upload mode.  
Note:  
· The current On/Off status of each NPS-2HD plug  
will not be saved or restored. However, the  
selected default On/Off setting for each plug will  
be saved and restored.  
· When the configuration file is sent to the NPS-2HD  
via telnet, the unit's IP Address, Subnet Mask, and  
Gateway Address cannot be altered.  
5. Type /SP and press [Enter], the NPS-2HD will display  
the Status Screen with passwords revealed. Check the  
Status Screen to make certain that saved parameters have  
been restored.  
 
A. Interface Descriptions  
A.1. Console Port Interface  
 
A.2. Modem Port Interface  
 
B. Specifications  
Power Input/Output; Model NPS-2HD (115 VAC)  
AC Inputs: Two (2); Bus 1 and Bus 2.  
Input Voltage: 105 - 120 VAC, 60 Hz  
Input Connector: IEC-320-C19 Inlet  
AC Outputs: Two (2); Bus 1 and Bus 2  
Output Connector: IEC-320-C20 Outlet  
Load: 20 Amps Each Bus  
Modem and Console Port Interface:  
Connector: DB9M, RS232C, DTE  
Coding: Serial ASCII, 8 Bits, No Parity  
Physical / Environmental:  
LED Indicators: ON, RDY, RXD, DCD, NET,  
Outlet ON (1 - 2)  
Size: 1.75" H x 19.0" W x 7.5" D (1RU)  
Weight: 10 Lbs. Shipping Weight  
Operating Temperature: 0°C to 45°C  
Humidity: 10 - 90% RH, Non-Condensing  
 
C. Customer Service  
Customer Service hours are from 8:00 AM to 5:00 PM,  
PST/PDT, Monday through Friday. When calling, please be  
prepared to give the name and model of the unit, its serial  
number and a description of its symptoms. If the unit should  
need to be returned for factory repair it must be accompanied by  
a Return Authorization number from Customer Service.  
WTI Customer Service  
5 Sterling  
Irvine, California 92618  
Toll Free Service Line: 1-888-280-7227  
Local Phone: (949) 586-9950  
Service Fax: (949) 457-8138  
 
Trademark and Copyright Information  
WTI and Western Telematic are trademarks of Western Telematic  
Incorporated. All other product names mentioned in this  
publication are trademarks of their respective companies.  
Information and descriptions contained herein are the property of  
Western Telematic, Inc.. Such information and descriptions may  
not be copied, disseminated or distributed without the express  
written consent of Western Telematic, Incorporated.  
©Copyright Western Telematic, Inc., 2001. All right reserved.  
Printed in the United States of America.  
October 2001  
WTI Part Number: 13186 Rev. A  
 
 
Index  
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D
A
B
C
E
F
G
H
I
L
 
M
Q
R
N
O
S
P
T
U
W
 
 
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