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Electrical Engineering · Industrial Automation · Ladder Logic

Forward-Reverse Motor Control with Interlocking Relays K1/K2

Type Logique à relaisNorme IEC 61131-3 Ladder DiagramMoteur schematex-ladderMis à jour 11/10/2026
Forward-Reverse Motor Control with Interlocking Relays K1/K2
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Le scénario

A three-phase motor must run in forward or reverse direction using two contactors K1 and K2, with pushbutton start/stop and mutual NC contact interlocks to prevent simultaneous energization.

Ce que contient ce dessin

Comprenez les décisions qui le sous-tendent.

01

Use seal-in auxiliary contacts to maintain coil state after momentary start pushbutton release

02

Add normally closed K1/K2 auxiliary contacts in series with opposite direction coils for electrical interlocking

03

Include overload relay NC contacts in both run circuits and a separate fault lamp rung for trip indication

Applicable to industrial motor control panels, conveyor reversers, hoists, and any reversing starter requiring safe directional interlocking and overload protection.

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