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Ladder Diagram · Seal-in

Motor start/stop seal-in circuit — Ladder Diagram

Classic three-wire motor start/stop seal-in circuit in IEC 61131-3 ladder logic — the foundational pattern taught in every PLC certification course.

Type Ladder logicStandard IEC 61131-3 Ladder DiagramEngine schematex-ladderUpdated 5/27/2026
Motor start/stop seal-in circuit
Drawing preview
The request

“A motor start-stop seal-in rung with a start button and motor auxiliary contact in parallel, a normally closed stop button, and a motor command output coil.”

Then tryAdd an overload contact.Change the output to a pump command.
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