Product Description
The Allen-Bradley 1771-IQ16K is a PLC5 digital DC input module with 16 inputs, operating on 10-32V DC with a 100mA backplane current, and handling 10-60V DC voltage in sink or source configurations. It features a conformal coating to protect against environmental contaminants and maintain insulation resistance. Meeting Council Directive safety requirements for low-voltage prevention, it's compatible with AC proximity switches like the Allen-Bradley Bulletin 871P. The front panel includes 8 status indicator switches showing terminal voltage presence, and optional fuse kits simplify the user interface. Output traces incorporate surge suppression circuitry, limiting voltage magnitude through an RC network when devices are wired in series with contacts.
Is Your Device Showing These Signs?
The Allen Bradley 1771-IQ16K input module commonly experiences issues such as blown input fuses, often caused by overvoltage or short circuits in field wiring. Technicians address failures stemming from corroded backplane connector pins, impacting communication with the PLC chassis. Troubleshooting includes verifying proper voltage levels at the input terminals and replacing damaged components such as optocouplers or resistors on the module's circuit board. Firmware corruption is rare but requires reflashing the EEPROM. Resolving these issues restores proper digital input signal processing and prevents system downtime.
Technical specifications
The Allen-Bradley 1771-IQ16K is a PLC5 digital DC input module with 16 inputs that operates on 10-32V DC. It uses 100mA backplane current and handles 10-60V DC in sink or source configurations. It's protected by a conformal coating, meets low-voltage safety standards, and is compatible with AC proximity switches. The module features status indicator switches and optional fuse kits, and includes surge suppression circuitry for series-wired devices.
Our Repair Process for the
1771-IQ16K
Our repair process for the Allen Bradley 1771-IQ16K input module begins with a thorough inspection for blown input fuses, a common failure point due to overvoltage or field wiring shorts. Technicians meticulously examine the backplane connector pins for corrosion, which disrupts communication with the PLC chassis. Voltage levels at the input terminals are verified, and damaged components, including optocouplers and resistors on the module's circuit board, are replaced as needed. In the rare event of firmware corruption, the EEPROM is reflashed. This process ensures the restoration of proper digital input signal processing and prevents system downtime.
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
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Ships from Rochester, NY