Db-9 Communication Port - Eaton Powerware 5125 User Manual

ADDITIONAL UPS FEATURES

DB-9 Communication Port

Table 3. Communication Port Pin Assignment
Pin Number Signal Name
1 Low Batt
2 TxD
3 RxD
4 DTR
5 GND
6 DSR
7 —
8 AC Fail
9 Power Source
48
Eaton 5125 Rack-Mount UPS (5000/6000 VA) User's Guide
www.eaton.com/powerquality
To establish communication 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.
Figure 23 identifies the cable pins and Table 3 describes the pin
functions.
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)
No Connection
AC Fail relay contact; 20 mA, 30 Vdc contact rating
+V (8 to 24 volts DC power)
6 7 8
9
1 2 3 4 5
Figure 23. Communication Port
S
164201541 Rev D
Direction from the UPS
Out
Out
In
In
—
Out
—
Out
Out