PLC Automation Engineer
PLC Automation Engineer Interview Questions and Answers
Updated 11 Sep 2024
Q1. What do you know about sink and source
Ans.
Sink and source refer to the direction of current flow in a PLC system.
Sink refers to when current flows into the input module of a PLC.
Source refers to when current flows out of the output module of a PLC.
Sink modules are typically used for sensors and switches.
Source modules are typically used for actuators and solenoids.
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