2 electrical connection of the plc inputs, Electrical connection of the plc inputs, Caution – INFICON T-Guard Leak Detection Sensor User Manual
Page 36: Plc in/out

34
Installation
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4.6.2
Electrical connection of the PLC inputs
The default setting is as follows:
Signal level:
24 V (low-resistance) means High,
0 V (high-resistance) means Low,
Change from LOW to HIGH:
The programmed command for the input is enabled (edge controlled).
Pin
Command
Explanation
1
Start
2
Stop
3
Cal
4
Proof
5
Clear:
6
Standby
7
Common
Common negative pole for all PLC inputs.
Connect to the negative pole of the power supply.
Caution
Max. permissible input voltage of the digital inputs: 28 V.
Fig. 5-2 Electrical connection of the PLC inputs
1
2
3
4
5
6
7
PLC IN/OUT
24V
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