Clary CMN2400D-PD - Manual (Page 19)

Page 19
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-25
subminiature female connector at the rear of the Control Panel. Interfacing cables are available.
The communications connector at the rear of the UPS is for a RS232 interface connection. The
Remote Panel 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 BATT
2- TX
3- RX
4- DTR
5- SIGNAL GROUND
6- DSR/+9V
7- RTS IN
8- AC INPUT FAIL
NOTE: Pin 4 enables a relay on the
Interface board that allows communications
directly with the UPS from the RS232
Connector. When relay is enabled, SNMP
is disabled.
REMOTE PANEL CONNECTOR ON THE
REAR OF THE CONTROL PANEL
2 & 14- AC INPUT FAIL
3- UPS ON
4 & 15- GROUND
5 & 9- LOW BATTERY
6- REMOTE SHUTDOWN+
7- +9VDC
8- REMOTE SHUTDOWN (RETURN)
13 9 8 7 6 5 4 3 2 1
25 15 14
AC INPUT FAIL
UPS ON
REMOTE +
1K
SHUTDOWN -
LOW BATTERY
GND
+9V +9V
1K 1K
+9V