- 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.
Learn more
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.
440T-MSSLE10BB
This device features a single key, slamlock mechanical switch that is trapped to release a standard actuator. It provides a shear force of 15.1 N on the key and incorporates tamper-resistant screws fo
In Stock Ships Today
440T-MSSSE22JA
This device complies with pollution degree 3 regulations and features a minimum switching current of 5 mA at 5 V DC. It includes one normally-open auxiliary contact and has a maximum switching load of
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440T-MSSSE22JB
This model has a rated insulation voltage of 500 V and complies with pollution degree 3 standards. It supports a minimum switching current of 5 mA at 5 V DC and a thermal current rating of 10 A. The d
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440T-MSSSE22JC
This trapped key interlock operates effectively within pollution degree 3 environments and features a minimum switching current requirement of 5 mA at 5 V DC. The unit supports a maximum switching loa
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442G-MAB-C03
The control interface includes a robust locking system known as the 442G Multifunctional Access Box, providing a holding force of up to 2000 N. It accommodates a guard-door misalignment tolerance of 5
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442G-MABH-L
This handle assembly functions effectively within a temperature range of -20 to 55 degrees Celsius during operation and can be stored between -20 to 65 degrees Celsius. The product is suitable for env
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442G-MABH-R
This handle assembly incorporates automatic locking for enhanced safety. The design includes four LED indicators to provide status feedback, along with an emergency stop push button for immediate acce
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442G-MABRB-UL-E0P49
With a lock mechanism that requires power to release, this unit supports high-level coded locking systems. The access box facilitates Ethernet/IP connectivity through dual M12 D-coded ports and also f
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442G-MABRB-UR-E0JP4679
This model incorporates a built-in lock/unlock actuator function, providing additional control. The device is housed in glass reinforced plastic and meets IP65 standards for protection against dust an
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442L-RA40330CBCD
This receiver unit is powered by a rated DC voltage of 24 V and can be mounted both vertically and horizontally for versatile installations. It can function within a temperature range of 0 °C to 40 °C
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