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Communication
Communication Port
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.
The cable pins are identified in Figure 19 and the pin functions are
described in Table 2.
Table 2. Communication Port Pin Assignment
Pin
Number
1
2
3
4
5
6
7
8
9
36
5
4
9
8
Figure 19. Communication Port
Signal Name
Function
Low Batt
Low Battery relay contact; 20 mA, 30 Vdc
contact rating
TxD
Transmit to external device
RxD
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)
—
No Connection
AC Fail
AC Fail relay contact; 20 mA, 30 Vdc contact
rating
Power Source
+V (8 to 24 volts DC power)
Powerware
5115 Rack-Mount User's Guide
®
3
2
1
7
6
Direction
from the UPS
Out
Out
In
In
—
Out
—
Out
Out
164201449 Rev A www.powerware.com
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