Product Description
The Allen-Bradley 1771-IG is a space-saving, cost-effective PLC 5 Digital DC Input Module that converts 5V DC TTL signals from user devices into logic levels for the PLC processor, updating corresponding data table bits. This Series A module, supporting , 1, and 2-slot I/O addressing, features 8 inputs with less than 1ms delay, optoelectrical isolation, and input filtering for noise reduction. It draws 122mA from the backplane, dissipates a maximum of 3.3W (11.3 BTU/hr), and provides a maximum customer supply current of 500mA. The 1771-WC wiring arm simplifies module replacement without disconnecting wires, and front-panel LEDs indicate TTL voltage status. It's designed for TTL and BCD encoder interfaces and installs in a 1771 I/O chassis with keying bands between pins 34-36 (upper) and 4-6 (lower).
Is Your Device Showing These Signs?
The Allen Bradley 1771-IG I/O module commonly experiences failures due to capacitor degradation, resulting in power supply instability and communication errors on the backplane. Troubleshooting often reveals corroded pins affecting signal integrity and causing intermittent input/output faults. Resolve issues by replacing aged electrolytic capacitors on the power supply board and thoroughly cleaning the backplane connector pins to ensure proper electrical contact. Address any short circuits or open circuits identified during component-level testing to restore optimal module functionality and prevent PLC system disruptions.
Technical specifications
The Allen-Bradley 1771-IG is a compact and economical PLC 5 DC input module that translates 5V DC TTL signals into PLC logic. It features 8 inputs with fast response times, optoelectrical isolation, and noise filtering. It supports multiple I/O addressing schemes, consumes minimal power, and offers a wiring arm for easy replacement. Front-panel LEDs display input status, and it's designed for TTL and BCD encoder interfaces, installing in a standard 1771 I/O chassis.
Our Repair Process for the
1771-IG
Our repair process for the Allen Bradley 1771-IG I/O module begins with a comprehensive diagnostic evaluation to pinpoint the root cause of the failure, focusing on common issues such as capacitor degradation, corroded pins, and circuit faults. We replace all aged electrolytic capacitors on the power supply board to eliminate power supply instability. The backplane connector pins undergo a meticulous cleaning process to guarantee proper electrical contact and signal integrity. Component-level testing identifies any short circuits or open circuits, which are then rectified to restore the module to its optimal operational state. This ensures the prevention of PLC system disruptions.
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