Eaton 5125 User Manual page 43

Table 1. Communication Port Pin Assignment
Pin Number Signal Name
1 Low Batt
2 TxD
3 RxD
4 DTR
5 GND
6 DSR
7 RTS
8 AC Fail
9 Power Source
Eaton 5125 Tower UPS (1000–2200 VA) User's Guide
Function
Low Battery relay contact; 20 mA, 30 Vdc contact rating
Transmit to external device
Receive from external device
PnP (Plug and Play) from external device (tied to Pin 6)
Signal common (tied to chassis)
To external device (tied to Pin 4)
PnP from external device
AC Fail relay contact; 20 mA, 30 Vdc contact rating
+V (8 to 24 volts DC power)
S
ADDITIONAL UPS FEATURES
05147304 Rev C www.eaton.com/powerquality
Direction from the UPS
Out
Out
In
In
—
Out
In / Out
Out
Out
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