16
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
Mains Fail (open emitter)
9
Mains 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
mains 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.
