Signals and interfacing – Clary SP U-MPL User Manual
Page 14

Page 14
SIGNALS AND INTERFACING
This system is designed to be compatible with most sophisticated operating systems when they
feature a UPS monitoring function. These signals are made available through the DB-9
subminiature female connector at the rear of the UPS. The communications connector at the
rear of the UPR is for a RS232 interface connection. The Signal connector features open-
collector alarm signals. Closing the points between pins 6 and 8 while running on battery will
shutdown the UPS. Below is a diagram of the signal jacks and their pin-outs:
RS232 CONNECTOR
1- LOW BATTERY/
2-
TX
3-
RX
4-
DTR
5-
GROUND
6-
DSR
7-
RTS
8-
AC FAIL/
NOTE: Pins 4 and 7 enable relays on the Interface board that allow communications directly with
the UPS from the RS232 Connector. When relays are enabled, SNMP is disabled.
SIGNAL CONNECTOR
2- AC FAIL
3-
UPS ON
4- GROUND
5-
LOW BATTERY
6-
REMOTE SHUTDOWN+
7-
REMOTE SHUTDOWN (RETURN)
8-
+9VDC