Liebert GXT User Manual download pdf (Page 13)

COMMUNICATIONS INTERFACE PORT

The UPStation GXT™ UPS contains a standard DB-9 female connector located

on the rear of the UPS unit. Several signals are provided 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 (5-12V); 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 EMITER*

(-)

(+)

330 Ohms

Open Collector

Open Emitter

*Maximum voltage and current on pins 1,7,8,9 is 80V DC; 10.0 mA.

UPS MONITORING

The UPStation GXT™ UPS has the capability of being monitored with stand

alone computers, network workstations, network servers, or UNIX hosts via the

DB-9 female connector located on the rear of the UPS.

This capability is used in applications requiring the UPS to provide status and

power monitoring information to the computer system. For example, during a

utility power failure, the information can be used by the computer’s operating

system or application program to automatically save information in buffers, to

close files, and shut down operations prior to battery capacity depletion.

Monitoring of the UPS via a computer system is easily made with a Liebert

SiteNet® 1 shutdown kit (sold separately). Consult your local Liebert

representative to determine the correct software kit for your application. The kit

includes special purpose cable and shutdown software.

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Liebert GXT User Manual Page 13