RepairXpert Industrial Automation

Safety Circuit Fault — E-Stop Active

40001

Emergency stop circuit is open. All motion disabled until circuit is restored and acknowledged at HMI.

critical general conveyor piler asrs packaging palletizer
safety estop emergency relay

Probable Causes (ranked)

Fix Steps

  1. 1 Walk the entire machine — check every E-stop button, twist/pull to reset each one
  2. 2 Check safety relay module LED indicators for fault channel identification
  3. 3 Verify all gate interlock switches — close all access gates fully until latch clicks
  4. 4 Check light curtain alignment — clear any obstructions from beam path
  5. 5 If all devices are clear, check wiring continuity through entire E-stop loop with multimeter
  6. 6 Reset safety relay module and acknowledge fault at HMI panel

Suggested Replacement Parts

Parts matched to fault category: Safety Relay

Allen-Bradley Guardmaster 440R-N23126 P/N: 440R-N23126 Dual-channel safety relay, 24VDC, 3 N.O. + 1 N.C., Cat 4 / PLe
Pilz PNOZ X3 Safety Relay P/N: 774310 24VDC/AC, 3 N.O. + 1 N.C., E-stop and safety gate monitoring

Prices are estimates. Verify part numbers match your equipment before ordering.

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