- 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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+1 (919) 205-4392
Allen Bradley PLC 3 Repair
We offer extensive repairs for your PLC 3. We keep many spare parts in stock so that we can repair your PLC 3 as efficiently and effectively as possible. Our standard repair lead time is 2-4 weeks. However, we can often repair your unit much faster if necessary. We can repair most issues with your PLC 3 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 PLC 3 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 PLC 3 Repairs
Browse our catalog of repairable PLC 3 parts to get a quote.
1775CXD
With its capacity to accommodate 2-, 3-, and 4-chassis PLC-3 systems, the 1775CXD is versatile in application. It supports 19-inch rack mounting and operates effectively within a temperature range of
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1775L1A
This module is rack-mounted and compatible with the PLC-3 chassis. It communicates via the Data Highway interface and connects to I/O modules from the same series. The 1775L1A can function reliably in
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1775L1B
This main processor module is designed to occupy two slots, specifically the leftmost slots within the chassis. It also enables the operation of multi-chassis PLC-3 systems if installed in chassis 0.
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1775L2A
The 1775L2A module integrates four AMD 2903 bit slice microprocessors, ensuring efficient processing capabilities. Its rated current at 5 VDC is 9 Amps and at 15 VDC is 40 mA. Ideal for rack or chassi
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1775L2B
This processor module occupies 2 slots within the I/O chassis, specifically positioned in the 2 leftmost slots. It draws power through the backplane, operating at a current level of 9.4 amps at 5V DC
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1775L2C
This main processor module is positioned in the two leftmost chassis slots. It operates with a power draw of 94A at +5V DC and 40mA at +15V DC. The module supports over 70 instructions and features a
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1775L3A
This main processor module features a backplane load of 6 A at 5 VDC and an auxiliary draw of 40 mA at 15 VDC. Designed for installation in a single-slot chassis mount, it has expansion bus access thr
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1775LP4
Within the PLC 3 series, the 1775LP4 module allows for integrated PID control and includes timers for various applications. It supports I/O monitoring and accommodates optional plug-in modules, enhanc
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1775P1A
This power supply unit has a wide input voltage range, operating effectively at 120 VAC within 97 to 132 VAC and at 220/240 VAC within 194 to 264 VAC. With its temperature range of 0 to 60°C for opera
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1775P1B
This power supply is compatible with PLC-3 controller systems and several module types, including communication, scanner, and memory modules. It supports a maximum operating humidity of 80% and functi
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