AB | 1771-IG | 1771 16 Point Digital Input Module

Allen-Bradley 1771-IG 16-Point Digital Input Module – PLC-5 I/O Platform

When a digital input module fails on a running production line, the consequences are immediate and severe: the PLC loses visibility into field device states, safety interlocks go blind, and the entire control loop collapses. Operators are forced into manual override, maintenance teams scramble for a replacement, and every minute of unplanned downtime compounds into measurable financial loss. In high-throughput manufacturing, food processing, or automotive assembly environments, this is not a theoretical risk — it is a recurring operational reality. The Allen-Bradley 1771-IG is the module that keeps that scenario from happening.

The 1771-IG is a 16-point digital input module engineered specifically for the Allen-Bradley PLC-5 family, one of the most widely deployed programmable logic controller platforms in global industrial automation history. Within the 1771 I/O chassis ecosystem, the 1771-IG occupies a critical role: it serves as the primary interface between field-level discrete sensors, switches, and contact closures and the PLC-5 processor. Its TTL-compatible signal architecture and robust noise immunity make it a trusted choice in facilities where signal integrity under electromagnetic interference is non-negotiable. Decades after its introduction, the 1771-IG remains an active part in MRO (Maintenance, Repair & Operations) inventories worldwide, a testament to the longevity of the PLC-5 installed base.

Technical Specifications

• Module Type: 16-Point Digital Input
• Series: Allen-Bradley 1771 I/O (PLC-5 Platform)
• Part Number: 1771-IG
• Input Points: 16 discrete input channels
• Signal Compatibility: TTL-compatible logic levels
• Backplane Interface: 1771 I/O chassis single-slot
• Weight: Approx. 400 g
• Manufacturer: Allen-Bradley / Rockwell Automation
• Form Factor: Single-slot 1771 I/O chassis module

Note: Always verify specifications against the official Allen-Bradley 1771-IG product documentation or contact our technical team for application-specific confirmation.

Key Features & Benefits

• 16 Independent Input Channels: Maximizes I/O density per chassis slot, reducing hardware footprint and wiring complexity in panel builds.
• TTL Signal Compatibility: Interfaces directly with TTL-level field devices, encoders, and proximity sensors without additional signal conditioning hardware.
• PLC-5 Native Integration: Designed as a first-party Rockwell Automation component, ensuring seamless communication with PLC-5 processors and RSLogix 5 programming environments.
• Proven MRO Reliability: Widely stocked as a critical spare across industries with long-lifecycle PLC-5 installations, minimizing mean time to repair (MTTR).
• Robust Construction: Industrial-grade PCB and housing designed to withstand vibration, temperature cycling, and EMI-rich factory environments.
• Drop-in Replacement: Compatible with existing 1771 I/O chassis wiring and backplane configurations, enabling fast swap-out without rewiring.

Industry & Equipment Applications

• Automotive Manufacturing: Body-in-white assembly lines, robotic welding cells, and conveyor control systems using PLC-5 controllers.
• Food & Beverage Processing: Bottling lines, packaging machinery, and CIP (Clean-in-Place) systems requiring reliable discrete input monitoring.
• Oil & Gas: Wellhead control panels, pipeline monitoring stations, and compressor skid automation with legacy PLC-5 infrastructure.
• Water & Wastewater Treatment: Pump station control, valve position feedback, and SCADA-integrated PLC-5 systems.
• Pulp & Paper: Process line control, roll press monitoring, and dryer section automation.
• Material Handling: Sortation systems, palletizers, and automated storage and retrieval systems (AS/RS) built on PLC-5 platforms.

System Integration & Compatible Parts

The 1771-IG is designed to operate within the broader Allen-Bradley 1771 I/O ecosystem. Compatible and commonly paired components include:

• 1771 I/O Chassis: 1771-A1B, 1771-A2B, 1771-A3B, 1771-A4B series chassis
• PLC-5 Processors: 1785-L20, 1785-L40, 1785-L60, 1785-L80 and related variants
• Power Supplies: 1771-P4, 1771-P6, 1771-P7 series
• Wiring Arms: 1771-WB, 1771-WC, 1771-WD field wiring arms
• Digital Output Modules: 1771-OA, 1771-OB, 1771-OD series for complementary output control
• Programming Software: RSLogix 5 (Rockwell Automation)

Contact our technical team to confirm compatibility with your specific chassis revision and processor firmware version.

Our Quality Assurance Process

At Konmask.com, every Allen-Bradley 1771-IG module undergoes a structured inspection process before shipment:

• Visual Inspection: PCB, connector pins, and housing examined for physical damage, corrosion, or component anomalies.
• Label & Traceability Verification: Part number, series, and revision markings confirmed against order specifications.
• Functional Testing (where applicable): Modules are bench-tested using compatible 1771 chassis and PLC-5 processors to verify input channel response.
• Packaging: Anti-static packaging with desiccant, foam cushioning, and tamper-evident sealing for safe international transit.
• Documentation: Certificate of conformity and inspection report available upon request.

How to Order

1. Submit an inquiry via the Contact Us form or email support@konmask.com with your required quantity and delivery timeline.
2. Our technical sales team will confirm stock availability, lead time, and provide a formal quotation within 1 business day.
3. Upon quote acceptance, we issue a proforma invoice and arrange payment via T/T (bank transfer), PayPal, or other agreed methods.
4. Order is packed, inspected, and dispatched with full tracking information and shipping documentation.
5. Post-delivery technical support is available for integration and commissioning questions.

Minimum Order Quantity: 1 unit. Volume pricing available for orders of 5+ units.

Why Choose Konmask.com?

• Specialized Industrial Focus: We source and supply PLC modules, DCS components, and automation hardware exclusively — no consumer electronics, no distractions.
• Global Sourcing Network: Access to verified surplus, refurbished, and new-old-stock (NOS) Allen-Bradley components from trusted international suppliers.
• Technical Expertise: Our team includes engineers with hands-on PLC-5 and 1771 I/O system experience, capable of advising on compatibility, substitution, and migration.
• Fast Response: Inquiries answered within 24 hours. Urgent requirements handled with priority sourcing.
• Transparent Transactions: Clear quotations, traceable shipments, and documented quality records for every order.
• Long-Term Partnership: We support MRO buyers, system integrators, and OEMs with ongoing supply agreements and preferred pricing programs.

Frequently Asked Questions

Q: Is the Allen-Bradley 1771-IG still in production?
A: The 1771-IG is a legacy product and is no longer manufactured by Rockwell Automation. However, it remains widely available as surplus or refurbished stock. Konmask.com maintains sourcing channels for this module to support ongoing PLC-5 installations.

Q: What is the difference between the 1771-IG and other 1771 digital input modules?
A: The 1771-IG is specifically designed for TTL-compatible input signals. Other modules in the 1771 family, such as the 1771-IA or 1771-IB, are designed for AC or 24VDC field signals respectively. Selection depends on your field device signal levels and wiring configuration.

Q: Can the 1771-IG be used in a ControlLogix or CompactLogix system?
A: No. The 1771-IG is designed exclusively for the 1771 I/O chassis used with PLC-5 processors. It is not compatible with ControlLogix (1756) or CompactLogix (1769) platforms without a dedicated 1771 I/O adapter bridge.

Q: Do you provide a warranty on the 1771-IG?
A: Yes. We offer a 90-day functional warranty on all tested modules. Warranty terms are detailed in our quotation documentation. Extended warranty options are available upon request.

Q: How long does shipping take?
A: Standard international shipping takes 5–10 business days depending on destination. Express DHL/FedEx options are available for urgent requirements. We ship worldwide from our warehouse in China.

Q: Can you supply multiple 1771-IG modules for a plant-wide spare parts program?
A: Yes. We regularly fulfill bulk MRO orders for facilities maintaining PLC-5 systems. Contact us to discuss volume pricing, lead times, and consignment stocking arrangements.

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Original Source: https://Konmask.com
Contact: support@konmask.com | +0086 19859288691

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