Allen-Bradley Guardmaster Parts

Safety • 30 parts available

Safety controllers, relays, and Guard I/O protect people and equipment. Listings include Guardmaster and related safety products.

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Part NumberDescription
440R-B23020Safety Relay 3 NO 1 NC 24V AC/DC
440R-C23139Safety Relay 3 NO 2 NC 2 PNP 24V AC/DC
440R-D22R2Guardmaster 24V dc Safety Relay - Dual Channel With 2 Safety Contacts, 1 Auxiliary Contact
440R-D23117Allen Bradley 440R-D23117
440R-D23118Allen Bradley 440R-D23118
440R-D23127Allen Bradley 440R-D23127
440R-D23128Allen Bradley 440R-D23128
440R-E21358Rockwell Automation - 440R-E21358
440R-E23191Electronic Timer Safety Relay 4 NO 2 NC 24V AC/DC
440R-G23110Rockwell Automation - 440R-G23110
440R-G23211Allen Bradley 440R-G23211
440R-G23212Allen Bradley 440R-G23212
440R-G23222Allen Bradley 440R-G23222
440R-G23232Allen Bradley 440R-G23232
440R-H23180Rockwell Automation - 440R-H23180
440R-M23088Safety Relay 2 NO and 2 NO delay 1 NC 24V AC/DC
440R-M23090Safety Relay 2 NO and 2 NO delay 1 NC 115V AC
440R-M23143Safety Relay 2 NO and 3 NO delay 24V AC/DC
440R-N23126Safety Relay 3 NO 1 NC 24V AC/DC
440R-N23132Safety Relay 3 NO 1 NC 24V AC/DC
440R-N23135Minotaur, MSR127RP, 24V Ac/dc, 3 No + 1 Nc, 22.5MM
440R-N23142Allen Bradley 440R-N23142
440R-N23152Safety Relay Module
440R-S13R2Safety Relay - 24 V dc Dual Channel With 3 Safety Contacts 1 Auxiliary Contact
440R-W23218Expansion Relay 2 PNP Solid State 24V DC
440R-W23221Expansion Relay 3 N.O 1 N.C 24V DC
440R-ZBE820AZ1Expansion Relay 8 NO 2 NC 24V AC/DC 120V AC
440R-ZBE820AZ2Rockwell Automation - 440R-ZBE820AZ2
440R-ZBL220Z24Rockwell Automation - 440R-ZBL220Z24
440R-ZBR520AZ1Safety Relay 5 NO 2 NC 24V AC/DC 120V AC

Guardmaster buying & repair guidance

Use the catalog string from the nameplate when ordering or quoting. Need a hand? Contact us or request a quote.

Common Guardmaster failures

  • Relay contact wear and welded contacts
  • Safety input faults from wiring or device mismatch
  • Configuration errors after module replacement
  • Age-related drift on safety relays

Seeing these symptoms? Repair services or search in-stock replacements.

Series & revision differences

Safety substitutions must preserve the safety function and SIL/PL rating. Do not mix incompatible GuardLogix or Guardmaster families without an engineering review.

Confirm the full catalog and series before you buy. Condition & authenticity · Quote a specific series

Repair vs replace

Replace when safety standards or risk assessments require a newer architecture. Repair may be appropriate for discrete Guardmaster relays with clear electromechanical faults.

Start a repair quote · Request a replacement quote · Search all inventory

Repair servicesRequest a quoteSearch all inventoryAll Allen-Bradley categories

Still have questions?

Find answers to shipping, warranties, repairs, and more.

Yes. NJT Automation maintains surplus and refurbished Guardmaster inventory in Milwaukee, with additional sourcing when a specific catalog number is not on the shelf. In-stock items above can ship the same business day when ordered by the cutoff.
In most cases, yes. We offer mail-in repair with testing and a warranty. Send photos and the catalog/series from the nameplate for a repair quote, often faster than waiting on obsolete new stock.
Request a quote with the full catalog string and series from the nameplate. We can confirm whether a nearby series is compatible or source the exact revision you need.
In-stock Milwaukee inventory typically ships the same business day when ordered before the cutoff, with ground and expedited options. Local pickup can be arranged. Contact us to schedule.
NJT Automation

NJTAutomation

Industrial Electronics

Supply & Repair, Milwaukee WI

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Trademarks & Compatibility

All trademarks, service marks, trade names, brand names, and logos displayed on this website are the property of their respective owners. Any references to manufacturers, products, or brands are for identification and compatibility purposes only and do not imply any affiliation with, endorsement by, sponsorship from, or authorization by the respective trademark owners.

Independent Supplier

NJT Automation is an independent supplier of surplus, refurbished, and pre-owned industrial automation equipment. Unless expressly stated otherwise, NJT Automation is not an authorized distributor, dealer, representative, or affiliate of the original equipment manufacturer (OEM) for any products offered on this website.

Product Condition & Warranty

Products sold by NJT Automation may be surplus inventory, discontinued models, older series, or units with earlier manufacturing date codes than those currently available from the OEM or its authorized distribution network. As NJT Automation is not an authorized distributor, manufacturer warranties, support programs, and other OEM services may not apply. Any warranty provided is solely that of NJT Automation, where applicable.

Firmware & Software Licensing

Certain programmable logic controllers (PLCs), drives, HMIs, and other electronic products may require firmware to operate. While some products may include firmware, NJT Automation makes no representations or warranties regarding whether firmware is installed, the firmware version or revision level, its compatibility with your application, or its licensing status.

NJT Automation does not provide, obtain, transfer, or license firmware on behalf of customers. We make no representation regarding your ability or legal right to obtain, download, install, or use firmware from the OEM, its authorized distributors, or any other source. It is the customer's sole responsibility to ensure compliance with all applicable End User License Agreements (EULAs), software licenses, intellectual property rights, and other terms governing the acquisition, installation, and use of firmware.

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