Installation and Operation Manual
MAN332%1.pm5
page 8
PC-Power also supports UPS communication software which uses volt-free contact signals. This type of
software normally provides:
•
Warning when mains fails.
•
Orderly system shutdown.
•
UPS switch off
Note:
The communication port connection is at the users discretion. If not connected, the UPS will warn
of a mains failure by sounding its audible alarm.
Pin Assignment:
PIN 1
Remote Turn-on (Models:PTM650VA-PTM1KVA).
PIN 2
UPS simulates a relay closing between pin 2 and pin 4 when input mains fails.
PIN 3
Not connected.
PIN 4
Common for pin 2 and pin 5.
PIN 5
UPS simulates a relay closing between pin 5 and pin 4 when the battery has less than
2 minutes backup time left.
PIN 6
User sends a RS232 high level (5-15V) for 3 seconds. This signal will turn off the UPS
until a satisfactory mains voltage is available. It can operate only if the UPS is in battery
mode. This pin is also used as the RS232 received pin (RXD).
PIN 7
Common for pin 6 and pin 9.
PIN 8
Not connected.
PIN 9
RS232 transmitter pin (TXD).
Note:
1. Pin 2 and Pin 5 are open collector outputs which must be pulled up to a common referenced supply,
switch rating: +40V, 0.15A non-inductive.
2. Pin 4 and pin 7 should only be connected to ground.
2.6 Data-Line Surge Suppression
The date-line surge suppression on the rear panel provides an easy way to protect a network (RJ45) or
modem (RJ11) connection from hazardous spikes. Connect a 10/Base-T network cable or telephone line
into the OUT socket.
4
3
2
1
6
7
8
9
5
