Allen Bradley PLC MicroLogix 1500 Repair

MicroLogix 1500 Repair

Allen Bradley PLC MicroLogix 1500
One Year DO Supply WarrantyOne Year DO Supply Warranty 
'Fast RepairsFast repairs at low costs

We offer extensive repairs for your MicroLogix 1500. We keep many spare parts in stock so that we can repair your MicroLogix 1500 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 MicroLogix 1500 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!

We can repair hardware issues and error codes with your MicroLogix 1500 such as:

  • Processors
    • 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
  • I/O Modules 
    • 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
  • Communication Modules​​​​​​​
    • DF1, DH-485, DH+, Profibus, Remote I/ (RIO) failures and more!
    • Intermittent communication 
    • Solid RED/Blinkging RED communication lights
    • Devicenet, Ethernet, ControlNet, RS232 ports. 
  • Thermocouple Modules/RTD Modules
    • Missing CJC Jumpers
    • Incorrect readings
  • High Speed Counters
    • ​​​​​​​Failed inputs
  • Power Supplies​​​​​​​
    • Dead power supplies
    • Incorrect voltage
  • Chassis/Racks
    • ​​​​​​​Broken Plastic
    • Poor Connections
    • Bad Slots


The MicroLogix 1500 series is a series of programmable logic controller systems by Allen-Bradley. Theses controllers feature a base unit that contains input and output circuits, a processor, and a power supply. With either 24 or 28 input and output embedded points, these controllers allow additional inputs and outputs to be added through the use of compact inputs and outputs. The MicroLogix 1500 programmable logic controllers are the most expandable models in the series. They come with 3 distinct configurations of embedded inputs and outputs. The controllers feature a memory of 7 KB or 14 KB. Since the base units have a power supply as well as integrated input and output, these controllers have some of the best specifications for a modular system which are not only cost-effective but also small and save space.

In addition to being able to connect to personal computers, the Allen-Bradley MicroLogix 1500 controllers can also connect to a DH-485 network through advanced interface converters (AIC) as well as an Ethernet network through an Ethernet Interface (ENI). Additionally, the controllers can be connected to a DeviceNet network by using an Allen-Bradley DeviceNet Scanner module (1769-SDN) and the Modbus SCADA network. The 1769 Compact expansion inputs and outputs also connect to the Allen-Bradley MicroLogix 1500 programmable logic controllers. Based on the system that is used, the users can use either 8 or 16 expansion I/O modules. With an operating system of (FRN) 3 or higher versions, another bank of inputs and outputs can be connected to these controllers. When the users use an expansion power supply, this increases the system’s capacity to allow for the addition of expansion input and output modules. The extra input and output banks are connected to the MicroLogix 1500 controllers through a uniquely designed cable, but they must include an end cap as well as a power supply.


Common issues with the MicroLogix 1500 include:


Plastics and mounting  

  • Doors 

  • Node address switches 

  • Din Rail clips 



  • Ethernet 

  • Extension I/O port 

  • RS-232 port 

  • Memory module port



  • Solid Fault Light 

  • Flashing Fault Light

  • LED indicators 

  • I/O indicator lights 



  • Discrete output replacement relay or TRIAC 

  • Discrete input replacement 

  • Analog out 

  • Analog in 

  • Fused input/output replacement

Part Number Description Price Action
1764-24AWAMicroLogix 1500 Repair Service$1377cartAdd To Cart
1764-24BWAMicroLogix 1500 Repair Service$708cartAdd To Cart
1764-28BXBMicroLogix 1500 Repair Service$756cartAdd To Cart
1764-DATMicroLogix 1500 Repair Service$546cartAdd To Cart
1764-LRPMicroLogix 1500 Repair Service$512cartAdd To Cart
1764-LSPMicroLogix 1500 Repair Service$156cartAdd To Cart
1764-MM1MicroLogix 1500 Repair Service$468cartAdd To Cart
1764-MM1RTCMicroLogix 1500 Repair Service$1056cartAdd To Cart
1764-MM2MicroLogix 1500 Repair Service$545cartAdd To Cart
1764-MM2RTCMicroLogix 1500 Repair Service$562cartAdd To Cart
1764-MM3MicroLogix 1500 Repair ServiceAskRequest A Quote
1764-MM3RTCMicroLogix 1500 Repair ServiceAskRequest A Quote
1764-RTCMicroLogix 1500 Repair Service$2560cartAdd To Cart
Part Number Description Price Action
DO Supply Repair
  • 1 Year Do Supply Warranty on most products

  • No surprises or up-charges for difficult repairs

  • Quick and easy process

  • Standard lead time of 2-4 weeks

  • Extensive quality control and testing
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