Chatsworth Products GT Series UPS (3-10kVA) - Manual (Page 15)

OPM_GTU_TWR_1K0_3K0_XUS_V015 14 DE GT Series: User manual rev date 8-11-04
Digital Energy GT Series
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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
Digital Energy GT Series
connectivity products please contact your local dealer or Internet:
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:
ASSIGNMENT DESCRIPTION
PIN
RS-232 Dry Contact
1 Low battery (Open collector)
2 UPS TxD (typical RS-232 level)
3 UPS RxD (typical RS-232 level) Remote shutdown (5~12V)
4 Reserved for PNP
5 GND GND
6 Reserved for PNP Reserved
7 Reserved for PNP Reserved
8 Utility Fail (Open collector)
9
Pin Assignment Open Collector Circuit
The maximum voltage and current on pin 1,8 is 30VDC, 10mA.
4 - Communication