Communications Interface Port - Liebert UPSTATION GXT 2U User Manual

Communications Interface Port

The UPStation GXT 2U UPS contains a standard DB-9 serial port female
connector located on the rear of the UPS unit. Several signals are pro-
vided on this port and are assigned as follows:
PIN
1
2
3
4
5
6
7
8
9
Pin Assignment
*Maximum voltage and current on pins 1,7,8,9 is 80V DC; 10.0 mA.
COMMUNICATIONS
ASSIGNMENT DESCRIPTION
Low Battery (open collector)
UPS TxD (typical RS-232 levels)
UPS RxD (typical RS-232 levels)
Remote Shutdown (5-12VDC, 10-24 mA max); battery
operation
Common
Remote Shutdown (short to pin 5); all modes of operation
Low Battery (open emitter)
Mains Fail (open emitter)
Mains Fail (open collector)
Tab le 1:
Collector to Emitter*
21
Open
(+)
Collector
330 Ohms
Open
(-)
Emitter