Emerson GXT2-10000RT208 user manual Communications Interface Port, 11.1.1 DB-9 Interface Port

Communications

11.0COMMUNICATIONS

11.1Communications Interface Port

The Liebert GXT2-10000RT208 UPS has a standard DB-9 serial port female connector located on the rear of the UPS unit. Several signals are provided on this port and are assigned as follows:

Table 2 DB-9 pin assignment

DB-9 Assignment Description

Pin

1Low Battery (open collector)

2UPS TxD (typical RS-232 levels)

3UPS RxD (typical RS-232 levels)

4Remote Shutdown (5-12VDC, 10-24mA max; battery operation)

5Common

6Remote Shutdown (short to pin 5); all modes of operation

7Low Battery (open emitter)

8Utility Fail (open emitter)

9Utility Fail (open collector)

	Pin Assignment			Collector to Emitter*
	6	7 8	9	(+)	Open
					Collector
				330 Ohms
				(-)	Open
1	2	3	4	5	Emitter

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

11.1.1DB-9 Interface Port

Using the following directions to attach the smaller enclosed ferrite bead clamp to the communication cable as shown at right:

1.Open the ferrite bead.

2.Place the communication cable inside the ferrite bead groove.

3.Position the ferrite bead as close as possible to the end of the cable that connects to the DB-9 connector of the UPS.

4.Close the ferrite bead so that the ferrite bead’s case snaps closed with the cable routed through the ferrite bead’s case.

Run cable through ferrite bead case

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