Product Description
The Allen-Bradley 1746-IC16 SLC 500 sinking DC input module features 16 sinking inputs operating at 48V DC, utilizing a removable terminal block. It exhibits temperature-dependent voltage ranges (30-60V DC at 55C and 30-55V DC at 60C), draws 0.085A at 5V DC from the backplane (0A at 24V DC), and has a maximum 4ms delay for both ON and OFF input signals. Key specifications include a 10V DC OFF-state voltage loss, 1.5mA leakage current, 4.1mA nominal input current at 48V DC, 1500V AC isolation between backplane and inputs (tested for 60s), and a 1500V AC dielectric withstand. It operates between 0-60C (5-95% RH), withstands 30G shock (11ms, 3 directions) and 1.0G vibration (5-200Hz), and can be stored between -40 and 85C.
Is Your Device Showing These Signs?
The Allen Bradley 1746-IC16 DC Input Module commonly experiences failures due to blown input fuses, often caused by overvoltage events or wiring errors. Technicians address issues such as corrupted firmware requiring a reflash, and degraded electrolytic capacitors leading to erratic input signal detection. Corrosion on the terminal block and backplane connector pins creates intermittent communication faults, necessitating cleaning or component replacement. Resolve diagnostic errors related to input status by inspecting field wiring and addressing grounding problems that induce noise. Module replacement is required when internal component failures such as optocouplers or resistors occur.
Technical specifications
The Allen-Bradley 1746-IC16 is a 16-point sinking DC input module for the SLC 500 system. It operates at 48V DC with a removable terminal block, has temperature-dependent voltage ranges, and draws minimal current from the backplane. It features a 4ms input delay, specific OFF-state voltage loss and leakage current, and robust isolation and dielectric withstand. The module is designed for industrial environments, tolerating wide temperature ranges, shock, and vibration.
Our Repair Process for the
1746-IC16
Our repair process for the Allen Bradley 1746-IC16 DC Input Module begins with a thorough inspection for blown input fuses, a common failure point due to overvoltage or wiring errors. Technicians then address corrupted firmware through reflashing procedures and replace degraded electrolytic capacitors to ensure accurate input signal detection. Corrosion on the terminal block and backplane connector pins is eliminated through meticulous cleaning or component replacement to restore reliable communication. Diagnostic errors related to input status are resolved by inspecting field wiring and correcting grounding problems that introduce noise. In cases of internal component failures, such as optocouplers or resistors, the module is replaced to guarantee operational integrity.
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.
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Ships from Rochester, NY