Communication; Description - GE Power Supply User Manual

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4.1

Description

The GT Series UPS is equipped with a communications interface, providing RS232 and dry
contact protocols in one sub-D 9-pin female connector located at the rear of the unit. The
communication port on the UPS can be connected to a computer. This port allows the
computer to monitor the UPS status and control the operation of the UPS in some conditions.
Using proper UPS management software and cable, the UPS can be managed in
LAN/intranet/internet environments.
Some computers may have a special connector to link this communication port, or require a
special plug-in card, or need a special UPS monitoring software. For specific information on
GE Digital Energy connectivity products please contact your local dealer @ 1-800-637-1738.
The dry contacts (4.3) and (optional) SNMP plug-in card (4.4) can be connected at the same
time. However, if both are operating simultaneously the remote shutdown facility for the dry
contacts will not be available. Battery low and AC failure functions remain unaffected.
The pin assignment of the interface connector is defined as follows:
PIN
1
2
3
4
5
6
7
8
9
Pin Assignment
The maximum voltage and current on pin 1,8 is 30VDC, 10mA.
OPM_GTU_19X_1K0_3K0_XUS_V014

4 - Communication

ASSIGNMENT DESCRIPTION
RS-232
UPS TxD (typical RS-232 level)
UPS RxD (typical RS-232 level)
Reserved for PNP
GND
Reserved for PNP
Reserved for PNP
14
Digital Energy
Dry Contact
Low battery (Open collector)
Remote shutdown (5~12V)
GND
Reserved
Reserved
Utility Fail (Open collector)
Open Collector Circuit
GT-UL Series: User manual 1.2 (US)
™
GT Series