Liebert GXT 2U user manual Communications Interface Port

Communications

7.0COMMUNICATIONS

7.1COMMUNICATIONS INTERFACE PORT

The UPStation GXT 2U UPS has 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				Assignment Description
1	Low Battery (open collector)
2	UPS TxD (typical RS-232 levels)
3	UPS RxD (typical RS-232 levels)
4	Remote Shutdown (5-12VDC, 10-24 mA max); battery operation
5	Common
6	Remote Shutdown (short to pin 5); all modes of operation
7	Low Battery (open emitter)
8	Utility Fail (open emitter)
9	Utility Fail (open collector)
Pin Assignment					Collector to Emitter*
6	7	8	9			(+)	Open
							Collector
					330 Ohms
1	2	3	4	5		(-)	Open
							Emitter

* Maximum voltage and current on pins 1, 7, 8, and 9 is 60VDC; 10.0 mA.

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