- 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.
440G-MT47038
This switch accommodates a conduit entry size of M20 and delivers a BBM action type along with fully flexible actuator type for enhanced adaptability. Designed for environments with a maximum humidity
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440G-MT47039
This guard locking switch features a 1/2 inch NPT conduit entry and utilizes a BBM action type with a GD2 standard actuator. It includes three safety contacts and one auxiliary contact. The device sup
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440G-MT47047
This guardlock switch is equipped with two normally closed safety contacts along with two normally open auxiliary contacts. The contact type utilizes a break before make principle, enhancing operation
Available
440G-MT47126
This guardlock switch operates with a power supply of 24V AC/DC and can handle a thermal current of 10 Amps. It is rated for an insulation voltage of 500V. The device locks with a power release mechan
Available
440G-MZS20SNLJ
This locking switch features a power-to-lock mechanism and utilizes an M12 5-pin connector for secure connections. The actuator code is a standard type, and the switch includes both the body and actua
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440G-S36001
This guardlock switch has a thermal current rating of 10 amps and an impressive mechanical lifespan of 1,000,000 operations. Constructed from plastic, the module also supports an insulation voltage of
Available
440G-S36002
This model operates at a rated current of 5A and utilizes a 24 V DC coil voltage. Featuring a mechanical contact type, the switch is compliant with standards such as ISO 14119, UL, and CE. It comes in
Available
440G-S36007
This switch is equipped with a standard fixed tongue actuator for operational functionality. It can exert a holding force of up to 1,200 N. With an IP67 rating, the housing ensures effective protectio
Available
440G-T21BGPL-1B
Featuring two normally closed safety contacts, this switch includes one normally open auxiliary contact and a solenoid configuration of 1 N.C. and 1 N.O. Rated with an IP67, it is suitable for harsh e
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440G-T21BGPM-1B
This locking switch is equipped with two normally closed (N.C.) safety contacts, one normally open (N.O.) auxiliary contact, and solenoid contacts comprising one N.C. and one N.O. The device holds a f
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