Safety Relays
Enicstra stocks safety relays used to monitor emergency-stop circuits, light curtains, safety mats, and guard interlocks on machine safety systems. Inventory covers single-function and configurable safety relays from Pilz PNOZ, Allen-Bradley Guardmaster (440R and MSR series), Siemens Sirius 3SK, Banner SC22-3, Schmersal, Omron G9SA/G9SX, and similar safety-rated lines.
Both current and obsolete safety relays are stocked — including legacy PNOZ X-series, older 440R-S codes, and discontinued G9SA models. Each unit is bench-tested and ships with a 12-month functional warranty. Note: this is a functional warranty on the device only; safety-circuit validation in the installed application remains the responsibility of the system integrator.
For any obsolete safety relay, send the OEM part number for a quote returned in 1–2 business days.
Safety Relays
Can't Find The Part You Need?
Send us the part number, manufacturer, quantity, and condition — we'll locate it.
Can I substitute a different safety relay if the OEM model is discontinued?
Sometimes, but it changes the safety function and requires re-validation per ISO 13849. The lower-effort path is sourcing the exact OEM part from surplus stock, which keeps the existing safety documentation valid.
Are these safety-certified to PL d / PL e?
The original OEM rating is preserved — surplus units retain their factory certification. We do not re-certify and we do not modify the device. The 12-month warranty covers functional failure, not the system safety case.
Do you stock obsolete Pilz PNOZ and Allen-Bradley 440R?
Yes. Legacy X-series and older 440R variants are sourced regularly. Send the full OEM number.
Will an AC-supply relay work on DC?
No. Safety relays are designed for a specific supply voltage and type. Mismatched supply will at best stop functioning and at worst damage the unit.
What is the lead time?
In-stock units ship same or next business day from St. Louis. Sourced units typically quote in 1–2 business days.
What is the warranty?
12-month functional warranty on the device. Safety-function validation in the application is the integrator's responsibility, independent of the device warranty.