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relay output

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Flat vector diagram comparing relay, transistor and triac PLC output wiring with labeled terminal blocks and load connections
plc output wiringrelay outputtransistor output

PLC Output Wiring: Relay, Transistor and Triac

Relay, transistor and triac PLC outputs wire differently and fail differently. Here is exactly how to connect each type and avoid the mistakes that kill modules.

Aug 4, 2026 · 10 min read

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