- Bad communication ports
- Broken selector/key switches
- Dead batteries/Bad Battery connections
- Solid or Blinking RED OK Status Light
- Solid or Blinking RED RUN Status Light
- Solid or Blinking RED Fault Status Light
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Allen Bradley Guardmaster Safety Relays Repair
We offer extensive repairs for your Guardmaster Safety Relays. We keep many spare parts in stock so that we can repair your Guardmaster Safety Relays as efficiently and effectively as possible. Our standard repair lead time is 3-5 days. However, we can often repair your unit much faster if necessary. We can repair most issues and if for some reason we cannot repair your unit we will do our best to offer a refurbished unit at the repair cost, so that you can get a working unit back as soon as possible!
- 2 Year DO Supply Warranty
- Fast repairs at low costs
- No surprises or up-charges for difficult repairs
- Standard lead time of 2-4 weeks
- Extensive quality control and testing
Get a repair quote
Not an Authorized Distributor: DO Supply is not an authorized distributor for listed manufacturers or tradenames and therefore the manufacturer's
warranty does not apply. All of our products come with DO Supply's 2-year warranty.
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Hardware issues & error codes we repair
We repair all of the following hardware issues and error codes with your Guardmaster Safety Relays parts.
- Bad analog inputs or ouptus
- Bad digital input or outputs
- Bad relays (stuck on/off)
- Incorrect voltages on inputs or outputs
- Incorrect current on inputs or outputs
- DF1, DH-485, DH+, Profibus, Remote I/ (RIO) failures and more!
- Intermittent communication
- Solid RED/Blinkging RED communication lights
- Devicenet, Ethernet, ControlNet, RS232 ports.
- Missing CJC Jumpers
- Incorrect readings
- Failed inputs
- Dead power supplies
- Incorrect voltage
- Broken Plastic
- Poor Connections
- Bad Slots
Browse Guardmaster Safety Relays Repairs
Browse our catalog of repairable Guardmaster Safety Relays parts to get a quote.
440N-Z21S16B
This non-contact switch includes 2 normally closed safety contacts and 1 normally open auxiliary contact for versatile applications. It has a sensing distance of 15 mm and features an LED indicating f
Available
440N-Z21S16H
This non-contact switch operates with solid-state technology and includes one normally open (NO) contact and one normally closed (NC) contact. It has an 8-pin DC quick disconnect connector for efficie
Available
440N-Z21S17H
This safety switch offers a current rating of 200 milliamperes across all its outputs, ensuring reliable operation during use. It is capable of sensing with a repeatable accuracy of 10% over its sensi
Available
440N-Z21S26B
This non-contact safety switch features a robust red plastic barrel housing with an IP69K rating for excellent protection against dust and moisture. The device supports a switching current of 200 mill
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440N-Z21SS2B
This non-contact switch features a rectangular housing and is equipped with a rectangular RFID actuator. Designed with a sensing distance of 18 mm, the switch includes dual safety outputs configured a
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440N-Z21SS2BN
This code actuator offers a sensing distance of 15 mm when active and 25 mm when inactive. It is equipped with two safety outputs at 24V DC and one auxiliary output. Response time for the actuator is
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440N-Z21SS2H
With a rectangular housing made from materials such as PBT and Valox, this safety switch provides a sensing distance of 18 mm. It has a dual safety output type (DC PNP) and utilizes a 1 M12 DC micro c
In Stock Ships Today
440N-Z21SS2HN
This non-contact switch is equipped with two normally closed safety contacts and one auxiliary contact. It connects using a Micro M12 terminal and features a coded actuator for enhanced safety. The un
In Stock Ships Today
440N-Z21U26A
This device uses an 18 mm plastic cylindrical barrel housing with a matching unique coded actuator and supports a cable length of 3 meters. It includes an LED indicator for monitoring door status and
In Stock Ships Today
440N-Z21US2HN
This model operates within a wide temperature range of -25 to 70°C and maintains functionality in humidity levels from 5% to 95% without condensation. It has a response time of 45 ms and a frequency o
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