Liebert 700-3000 VA user manual Communications Interface Port, UPS Monitoring

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 ASSIGNMENTCOLLECTOR TO EMITER*

Open Collector (+)

330 Ohms

(-)

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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