Product Description
The Allen-Bradley 1771-IRK PLC-5 RTD is a self-powered, smart I/O module that directly processes temperature or Ohm readings. It supports up to six 3-wire RTD inputs with a channel update resolution of 50ms/8 channels, providing 16-bit plus sign resolution of 1C/1F per bit. It's compatible with 100 Ohm platinum and 10 Ohm voltage inputs, and its conformal coating protects the internal circuitry from environmental contaminants. Plastic keying bands are included for I/O chassis status indication, allowing flexible backplane connector keying (excluding the leftmost connector, reserved for processors/adapters), which is powered by the chassis power supply.
Is Your Device Showing These Signs?
The Allen Bradley 1771-IRK I/O rack exhibits common failures such as backplane communication errors stemming from corrupted data packets or addressing conflicts. Power supply degradation results in insufficient voltage levels, causing module malfunction and system instability. Corrosion on the backplane connectors impedes signal integrity, leading to intermittent I/O failures. Component aging, particularly electrolytic capacitors, induces performance degradation and eventual module failure. Firmware corruption necessitates reprogramming to restore proper functionality.
Technical specifications
The Allen-Bradley 1771-IRK PLC-5 RTD module is a self-powered, smart I/O module that reads temperature or Ohm values directly from up to six 3-wire RTD inputs. It offers a 50ms update resolution for 8 channels and 16-bit plus sign resolution (1C/1F per bit). It supports 100 Ohm platinum and 10 Ohm voltage inputs, has a conformal coating for environmental protection, and includes plastic keying bands for flexible backplane connector keying (excluding the leftmost connector). It's powered by the chassis power supply.
Our Repair Process for the
1771-IRK
Our repair process for the Allen Bradley 1771-IRK I/O rack begins with a comprehensive diagnostic evaluation to pinpoint the root cause of failure, focusing on backplane communication integrity, power supply output levels, and connector corrosion. We meticulously inspect the backplane for data packet corruption, addressing conflicts, and signal impedance issues. The power supply undergoes rigorous testing to ensure it delivers the required voltage and current. Backplane connectors are thoroughly cleaned and inspected for corrosion, with replacement performed as needed. Component-level analysis identifies and replaces aged or failing components, especially electrolytic capacitors. Firmware is verified and reprogrammed if corruption is detected, ensuring the module operates with the correct parameters. Following repairs, the I/O rack undergoes extensive functional testing under simulated operating conditions to guarantee complete restoration of functionality and system stability.
Your Guarantee: Warranty & Lifetime Support
Your satisfaction is our top priority, and we confidently stand behind the quality of our repairs. That's why every repair service is covered by our comprehensive 24-month warranty. Furthermore, we offer lifetime phone support – if you have questions or need assistance related to our repair down the road, we're here to help. Our service commitment is straightforward: we guarantee our work, and if you're not satisfied, we will make it right. Learn More about our Repair process.
Comprehensive Repairs You Can Depend On
We take immense pride in the quality and reliability of our work. Our process goes beyond simply fixing the immediate problem. We perform a comprehensive inspection of your main board (or other equipment) and proactively replace components known to be failure-prone or showing signs of potential future failure. Before any item is returned, it undergoes rigorous functional testing to ensure it meets performance specifications and operates flawlessly. Visit our main Repair Services page to learn more.
Save Significantly
Our primary goal is to save you hundreds, or even thousands, of dollars compared to the cost of new equipment replacement. By repairing existing components, we provide an economical solution that is also eco-friendly. At Roc Industrial, our commitment to integrity and community drives our consistent growth and ensures you receive a reliable, cost-effective solution.


Please Note: Roc Industrial operates as an independent service provider and is not an authorized distributor for the manufacturers or brands mentioned. Consequently, the original manufacturer's warranty is not applicable to items repaired or sold by us. Roc Industrial provides its own 2-year warranty on all repair services performed.
Buying Options
To receive a quote within 2 hours, please provide us with the details of your requirements. Our team will promptly review your request and send you a custom offer.
Ships from Rochester, NY