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Industrial Automation · PLC Ladder Logic · Pump Control

24V Recycle Timer Control for Sump Pump

Type Ladder logicStandard IEC 61131-3 Ladder DiagramEngine schematex-ladderUpdated 10/4/2026
24V Recycle Timer Control for Sump Pump
Drawing preview
The scenario

A sump pump must run periodically under 24V relay control, starting on high-level float or manual test and repeating on/off cycles until the float clears.

What is in this drawing

Read the decisions behind it.

01

Use a parallel OR branch to let the manual test button or high-level float trigger the cycle

02

Deploy a TON pump-on timer and a recycle off timer with an RES instruction to retrigger the cycle

03

Keep the pump relay coil as a discrete output after the on-timer done bit

Use for small sump or bilge pump applications with 24V control relays where an automatic recycle timer reduces short cycling and adds manual test capability.

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