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Allen-Bradley 1771-IG 8-Point TTL Digital Input Module

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Allen-Bradley 1771-IG

by Allen-Bradley

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OverviewElevate your industrial control capabilities with the Allen-Bradley 1771-IG, a robust 8-point TTL digital input module crafted for seamless integration within PLC-5 control systems. This essential component delivers precise and rapid signal processing, reliably handling 5-5.3V DC voltage inputs. Optimized for quick data processing, the 1771-IG is the perfect solution for applications demanding swift and accurate information acquisition from TTL-level devices. The 1771-IG ensures straightforward installation and operation within your current infrastructure. It is fully compatible with the 1771-WC wiring arm (available separately), facilitating effortless mounting into PLC-5 racks. This compatibility streamlines wiring and guarantees stable, efficient input signal management, minimizing downtime and boosting productivity. Its Series A designation further confirms its consistent and proven performance in the most demanding industrial settings.Key Features Eight TTL Digital Inputs: Dedicated for high-speed 5V DC signal processing, ensuring accurate data capture. Optimized Operating Voltage: Designed for efficient operation within a 5-5.3V DC range, aligning perfectly with TTL input requirements. Rapid Response Time: Guarantees accurate, real-time data acquisition, vital for critical automation processes. Seamless PLC-5 Integration: Engineered for effortless compatibility with Allen-Bradley PLC-5 control platforms, simplifying system expansion. 1771-WC Wiring Arm Ready: Facilitates easy and secure installation, ensuring reliable connections (wiring arm sold separately). Series A Reliability: Represents a dependable and well-established series, promising consistent performance in industrial applications. Technical Specifications Model: 1771-IG Series: A Number of Inputs: 8 Input Type: TTL (5V DC) Operating Voltage: 5-5.3V DC Wiring Arm Compatibility: 1771-WC Backplane Current Load: 175mA at 5V DC Response Time: Fast switching for real-time control applications Mounting: PLC-5 Chassis Certifications: UL, CE, RoHS Applications Industrial Automation & Process Control: Provides reliable data acquisition for precise machine control and process optimization. High-Speed Digital Input Processing: Ideal for monitoring and managing TTL-level signals in high-demand environments. Manufacturing & Assembly Lines: Supports real-time production monitoring and automated assembly processes, enhancing efficiency. Embedded Control Systems: Integrates seamlessly with PLC-5 for advanced automation and complex control strategies. SCADA & Monitoring Systems: Delivers accurate digital input feedback, enabling comprehensive system oversight and rapid response to operational changes. Robotics and Motion Control: Essential for capturing quick signals from sensors and encoders in dynamic robotic applications. Why Choose the Allen-Bradley 1771-IG? Exceptional Compatibility: Specifically designed for PLC-5 systems, ensuring flawless integration and reducing setup complexities. Superior Performance: Offers 8 high-speed TTL-compatible inputs, providing rapid and accurate data processing for critical applications. Robust and Dependable: Constructed to Allen-Bradley's stringent industrial standards, offering long-term reliability in demanding environments. Enhanced Operational Efficiency: Its quick response time and seamless integration contribute to more efficient system operation and reduced latency. Future-Proof Your Systems: Investing in a proven Series A module guarantees longevity and compatibility within widely adopted industrial standards. Optimized for Low-Voltage Needs: Perfectly suited for scenarios requiring precise monitoring of low-voltage digital inputs, expanding system capabilities. Order NowDo not compromise on the efficiency or reliability of your industrial control systems. The Allen-Bradley 1771-IG Digital Input Module is the premier choice for enhancing your operations.FAQWhat is the primary function of the Allen-Bradley 1771-IG module?The 1771-IG is an 8-point TTL digital input module designed to provide high-speed, precise data acquisition from TTL-level devices for Allen-Bradley PLC-5 control systems.What voltage range does the 1771-IG support?This module is engineered to operate efficiently with 5-5.3V DC voltage inputs, specifically tailored for TTL input requirements.Is the 1771-IG compatible with other Allen-Bradley accessories?Yes, it is fully compatible with the 1771-WC wiring arm (sold separately), which simplifies installation and ensures stable input signal management.What does the "Series A" designation signify for this module?The Series A designation indicates a consistent and proven performance record, assuring reliability in demanding industrial environments.In what types of applications is the 1771-IG typically used?It is ideal for industrial automation, process control, high-speed digital input processing, manufacturing lines, embedded control systems, SCADA, monitoring, robotics, and motion control applications.

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PRODUCT DETAILS

Allen-Bradley 1771-IG

Overview

This is a genuine Allen-Bradley component from the PLC-5 Platform (Legacy) family. PalmPartsSolution stocks it in new, refurbished, and surplus condition with tested warranty and same-day shipping on in-stock units.

Whether you are sourcing a like-for-like replacement for an existing installation, an emergency spare to keep a line running, or a qualified part for a new build, our team can confirm availability, revision, and lead time before you order.

Key Features

  • Genuine Allen-Bradley catalog part
  • Tested before shipment
  • Backed by PalmPartsSolution warranty
  • Cross-reference and revision assistance available
  • Compatible with the broader Allen-Bradley automation ecosystem
  • Engineered to integrate inside PLC-5 Platform (Legacy) installations

Compatibility

When ordering, match the full catalog/part number, hardware revision, and firmware revision called out by your Allen-Bradley equipment. Where applicable, confirm:

  • Input/output voltage and current rating
  • Communication protocol and network role
  • Mounting form factor and footprint
  • Operating temperature, humidity, and IP rating
  • Required certifications (UL, CE, ATEX, marine, etc.)

Not sure which revision you need? Send us the catalog number on the nameplate and we will confirm the correct match.

Replacement Information

Three ways to source this part through PalmPartsSolution:

  1. Exact replacement — same Allen-Bradley catalog number, new or refurbished, tested and warrantied
  2. Form-fit-function equivalent — alternate revision or build that drops in without code changes
  3. Engineered migration — current-generation Allen-Bradley platform with documented conversion notes for the PLC-5 Platform (Legacy) family

Contact our engineering team if you need help choosing between these tracks.

Technical Specifications

  • Model: 1771-IG
  • Series: A
  • Number of Inputs: 8
  • Input Type: TTL (5V DC)
  • Operating Voltage: 5-5.3V DC
  • Wiring Arm Compatibility: 1771-WC
  • Backplane Current Load: 175mA at 5V DC
  • Response Time: Fast switching for real-time control applications
  • Mounting: PLC-5 Chassis
  • Certifications: UL, CE, RoHS

Applications

  • Industrial Automation & Process Control: Provides reliable data acquisition for precise machine control and process optimization.
  • High-Speed Digital Input Processing: Ideal for monitoring and managing TTL-level signals in high-demand environments.
  • Manufacturing & Assembly Lines: Supports real-time production monitoring and automated assembly processes, enhancing efficiency.
  • Embedded Control Systems: Integrates seamlessly with PLC-5 for advanced automation and complex control strategies.
  • SCADA & Monitoring Systems: Delivers accurate digital input feedback, enabling comprehensive system oversight and rapid response to operational changes.
  • Robotics and Motion Control: Essential for capturing quick signals from sensors and encoders in dynamic robotic applications.

Why Choose the 1771-IG?

  • Exceptional Compatibility: Specifically designed for PLC-5 systems, ensuring flawless integration and reducing setup complexities.
  • Superior Performance: Offers 8 high-speed TTL-compatible inputs, providing rapid and accurate data processing for critical applications.
  • Robust and Dependable: Constructed to Allen-Bradley's stringent industrial standards, offering long-term reliability in demanding environments.
  • Enhanced Operational Efficiency: Its quick response time and seamless integration contribute to more efficient system operation and reduced latency.
  • Future-Proof Your Systems: Investing in a proven Series A module guarantees longevity and compatibility within widely adopted industrial standards.
  • Optimized for Low-Voltage Needs: Perfectly suited for scenarios requiring precise monitoring of low-voltage digital inputs, expanding system capabilities.

Availability & Shipping

  • In stock: 1771-IG ready for immediate dispatch from our Florida warehouse.
  • Free USA shipping: FedEx Priority (2–5 business days) and UPS Ground (3–5 business days). Expedited options available at checkout.
  • Worldwide delivery: FedEx International Priority (1–5 days), UPS International Priority (3–5 days), and USPS International (5–10 days) — rates calculated at checkout.
  • Bulk pricing: Volume discounts on request — contact our sales team for quantity quotes.
  • Buy with confidence: Every 1771-IG ships with a 1-Year PALM Parts warranty and a 30-day return window.
SUPPORT

Frequently Asked Questions — Allen-Bradley

The 1771-IG is an 8-point TTL digital input module designed to provide high-speed, precise data acquisition from TTL-level devices for Allen-Bradley PLC-5 control systems.

Machine down? We ship parts the same day.

New, surplus, and refurbished Allen-Bradley inventory in stock. Request a quote or speak directly with an automation specialist for emergency sourcing.

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PALM Parts Solution operates as an independent industrial automation supplier and is not an authorized distributor or affiliate of any listed manufacturer or brand name. Manufacturer trademarks and product names are used solely for identification purposes. Original manufacturer warranties do not apply. All products sold by PALM Parts are backed by our own 1-year warranty.

Product Condition & Firmware

All products are sold as new unless stated otherwise. Original manufacturer packaging may show signs of handling, storage, or shelf wear. Date codes and series may vary from current factory production. PALM Parts does not guarantee the presence, version, or compatibility of any firmware on PLC or automation products.

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