METRODATA LTD
WCM1100 / WCM3100 / WCM-Serial / LHM1000 / LVM2000 User Manual
76-02-082 Rev N
153 of 169
The WCM units only provide a major alarm relay which is accessed via the 9 way D
connection and is shared with the terminal port.
The full terminal port connector pin out is as shown below:
Pin
Mode
Signal
Direction
1
2
Terminal Receive Data
Output
3
Terminal Transmit Data
Input
4
Terminal DTR
Input
5
Terminal Signal Ground
6
7
Alarm
Relay Common
8
Alarm
Relay Normally Open
9
Alarm
Relay Normally Closed
Note, that the normally open/closed contacts assume these states in the powered up, non
alarm state.