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Table6-5 the definition of pin of terminal block
Pin NO.
Description
+24VDC
Positive of 24V DC power.
COM24V
Negative of 24V DC power.
+5VDC
Positive of 24V DC power.
A
RS485 communication terminal A
B
RS485 communication terminal B
COM5V
Negative of 5V DC power.
VCC
Positive of VCC.
COM
Negative of VCC.
P_IN
Input of pressure signal.
DG_IN
Dry protection signal input terminal of sensor
SY_IN
Overflow protection signal input terminal of sensor
COM
Common terminal of water level sensor
SW_IN
Input of switch signal.
SW_OUT
Output of switch signal.
COM
Negative of switch signal.
6.6.2 Water level sensor connection
Two kinds of water level sensor you can select are shown below:
Sensor A Sensor B
Figure6-6 Sensor
