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If you are looking for a non-contact electromagnetic switch able of integrating RFID coding and inductive sensing technologies, let us introduce you to SensaGuard from Rockwell Automation.

SensaGuard 440G-EZ Interlock Switches improve machine safety and help prevent unexpected downtime. These solenoid switches offer a Power to Lock (PTL) magnetic locking function with a holding force of 500N and a tolerance of 5mm to misalignment.

The wide sensing range and misalignment tolerance of SensaGuard non-contact interlock switches make them a cost-effective solution for a wide range of industrial safety applications.

Main features of the 440G-EZ electromagnetic switch

  • Power to Lock (PTL) function
  • PLe, SIL3 for interlocking applications
  • Process and machine protection according to ISO EN 14119
  • 500 N holding force (25 N magnetic holding without power supply)
  • Simple to install and align
  • IP67 protection class
  • Mounting options: surface or flush mount

Overview of the safety switch


  • 24V DC
  • 2 PNP OSSDs

Connection Options

  • 5 pin Micro M12 QD
  • 8-Pin Micro M12 QD
  • Auxiliary pin for door status

Highest Level of Safety

 Performance level e (PLe)
– Safety integrity Level 3 (SIL 3)
– EN ISO 13849-1 for door position
– ISO 14119 3.29 application of a guard locking device to help protect the working process from being interrupted

Magnetic Locking Function

  • Power to Lock (PTL)
  • 500 N holding force
  • 25 N holding force de-energized
  • 50 ms response time

LEDs Status

  • Lock – yellow – when magnetic force is supplied with 24V DC
  • OSSD – green when OSSD pair is ON state, red when OSSD pair is OFF state

Allen-Bradley® Guardmaster® SensaGuard safety switches are ideal for applications where safety is a priority. Rockwell Automation’s innovative products help protect workers, machinery and the environment while maximizing uptime.



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