Connecting Proximity Sensors (Contact switches)
(Status Input Modules)
For proximity sensors or contact switches only 2-wire connections are
needed. Simply connect
+ & E
terminal pins to the proximity sensors.
CAUTION ! Do not connect “-“ terminal to the sensor as it may blow the fuse
on the control module
Figure 5. Proximity Sensor connection to PT920 Input Module type
13
−
E
+
CH−1
PROXIMITY SENSOR
CONTACTS CLOSED
NORMAL
CONTACTS OPEN
ALARM
SCHEMATIC
PROXIMITY SENSOR
SENSOR INPUT TERMINAL ON
PT920 MAIN CONNECTION BOARD
CAUTION !
DO NOT USE "−" CONNECTION
2−WIRES: + & E
