Db-9 Communication Port - Eaton Powerware 9125 User Manual

COMMUNICATION

DB-9 Communication Port

To establish communication between the UPS and a computer, connect
your computer to the UPS communication port using the supplied
communication cable (see Figure 18).
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 19 and the pin functions are
described in Table 3.
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
38
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Figure 19. Communication Port
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)
®
9125 Two-in-One UPS (5000/6000 VA) User's Guide
6 7 8 9
1 2 3 4 5
Direction from the UPS
Out
Out
In
In
—
Out
—
Out
Out
S
164201513 Rev B