Guard I/O 1791ES and 1791DS Repair

Allen Bradley PLC Guard I/O 1791ES and 1791DS
One Year DO Supply WarrantyOne Year DO Supply Warranty 
'Fast RepairsFast repairs at low costs

We offer extensive repairs for your Guard I/O 1791ES and 1791DS. We keep many spare parts in stock so that we can repair your Guard I/O 1791ES and 1791DS 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 Guard I/O 1791ES and 1791DS 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!

Repair Details

We can repair hardware issues and error codes with your Guard I/O 1791ES and 1791DS 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

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The Guard I/O 1791ES and 1791DS module series is a series of Allen-Bradley Guard I/O Ethernet/IP and DeviceNet safety modules that help to implement CIP safety protocol extensions over the DeviceNet and Ethernet/IP networks. In addition to providing fail-safe communication between safety devices and controllers on the DeviceNet/Ethernet network that meets safety requirements up to Safety Integrity Level 3 (SIL 3), the Guard I/O 1791ES and 1791DS module series devices can be used to design and create safety-control systems for the processing and communication of safety data on both networks. The Guard I/O 1791ES and 1791DS modules are DC powered devices with an input range of 18 to 30 Volts DC, and a maximum current rating of 8 Amps. These devices have current sinking-type safety inputs that serve as interfaces for emergency stop pushbuttons, gate switches, and safety light curtains.


The Guard I/O 1791ES and 1791DS modules support both single and dual-channel modes that allow for use in Safety Categories 2, 3, and 4. They all have time-setting switches that allow for the monitoring of logical discrepancies between 2 channels. The Guard I/O 1791ES and 1791DS modules have 4 dual-channel bipolar safety outputs that are the current-sinking/current sourcing type with 2 Amps maximum input current ratings, and these safety outputs can only be controlled by safety controllers. The Guard I/O 1791ES and 1791DS modules have current sourcing pulse test outputs that can be used to detect short-circuit conditions on the safety inputs, and these outputs can be configured for standard outputs. These devices collect both I/O and I/O status data for the monitoring of I/O operation, and the 1791DS (only) devices have password-protected security that protects the configuration data. The Guard I/O 1791ES and 1791DS modules are DIN Rail mounted, and they come with removable I/O connectors that support mechanical keying.

Part Number Description Price Action
1791DS-IB12Guard I/O 1791ES and 1791DS Repair Service$98cartAdd To Cart
1791DS-IB16Guard I/O 1791ES and 1791DS Repair ServiceAskRequest A Quote
1791DS-IB4XOW4Guard I/O 1791ES and 1791DS Repair ServiceAskRequest A Quote
1791DS-IB8XOB8Guard I/O 1791ES and 1791DS Repair Service$105cartAdd To Cart
1791DS-IB8XOB8EGuard I/O 1791ES and 1791DS Repair ServiceAskRequest A Quote
1791DS-IB8XOBV4Guard I/O 1791ES and 1791DS Repair Service$181cartAdd To Cart
1791ES-IB16Guard I/O 1791ES and 1791DS Repair ServiceAskRequest A Quote
1791ES-IB8XOBV4Guard I/O 1791ES and 1791DS Repair Service$234cartAdd To Cart
Part Number Description Price Action
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