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Single-Port Modules
The Powerware 5125 is factory installed with a Single-Port Module.
To establish communications between the UPS and a computer, connect your computer to the UPS
communication port using the supplied communication cable.
When the communication cable is installed, power management software can exchange data with the UPS.
The software polls the UPS for detailed information on the status of the power environment. If a power
emergency occurs, the software initiates the saving of all data and an orderly shutdown of the equipment.
The cable pins are identified in Figure 9 and the pin functions are described in Table 1.
Table 1. Communication Port Pin Assignment
Pin Number
1
2
3
4
5
6
7
8
9
Figure 9. Communication Port
Signal Name
Function
Low Batt
Low Battery relay contact
RxD
Transmit to external device
TxD
Receive from external device
DTR
PnP (Plug and Play) from external device (tied to Pin 6)
GND
Signal common (tied to chassis)
DSR
To external device (tied to Pin 4)
RTS
PnP from external device
AC Fail
AC Fail relay contact
Power Source
+V (8 to 24 Volts DC Power)
13
Direction from the
UPS
Out
Out
In
In
-
Out
In/Out
Out
Out
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