Product Details
Overview
The Allen-Bradley 1771-IGD (1771-IGD/A) is a TTL-based digital input module designed for the PLC-5 platform. It provides reliable signal acquisition with selectable positive or negative logic, fast response times, and compatibility with a wide range of 1771-series chassis. This module is suitable for controlling and monitoring discrete signals in industrial automation systems.
Technical Specifications
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Manufacturer: Allen-Bradley
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Model Number: 1771-IGD/A
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Product Type: Digital TTL Input Module
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Category: PLC Input Module
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Compatible Chassis: 1771-A1B, 1771-A2B, 1771-A3B, 1771-A3B1, 1771-A4B, 1771-AM1, 1771-AM2
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Number of Inputs: 16 TTL channels
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Logic Type: Selectable Positive or Negative Logic
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Signal Voltage Rating:
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Positive Logic: On = 2.0–5.25 VDC, Off = -0.2–0.8 VDC
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Negative Logic: On = -0.2–0.8 VDC, Off = -2.0–5.25 VDC
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Backplane Current Draw: 130 mA @ 5 VDC
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Signal Delay:
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DC On: < 1 ms
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DC Off: 20 ± 9 ms
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AC Off: 24 ± 10 ms
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Power Dissipation: Max 2.7 W, Min 0.4 W
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Operating Temperature: 0–55 °C (32–131 °F)
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Voltage Category: 5 VDC TTL logic
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Wiring Arm: 1771-WH
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Module Status: Earlier Model
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Weight: 0.45 kg (1.0 lb)
Key Features
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Selectable positive or negative logic input for flexible control systems
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Fast signal acquisition and low delay to enhance system responsiveness
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Fully compatible with 1771-series PLC-5 I/O chassis
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TTL-level inputs for precise digital signal detection
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Compact and durable module construction
Application Scenarios
The 1771-IGD/A input module is ideal for:
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Industrial discrete input monitoring
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Machine control and automation systems
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PLC-based process control applications
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Distributed I/O installations on PLC-5 platforms
FAQ
Q1: Which chassis are compatible with the 1771-IGD/A module?
A1: It works with 1771-A1B, A2B, A3B, A3B1, A4B series and 1771-AM1/AM2 I/O chassis.
Q2: What is the maximum input voltage for this module?
A2: The module operates with TTL signals at 5.0–5.3 VDC.
Q3: How fast is the response time?
A3: DC signal on delay is less than 1 ms and DC off delay is 20 ± 9 ms.
Additional Information
- 100% Genuine Parts: All products are original and authentic, ensuring reliable industrial performance.
- 30-Day Refund Guarantee: Return any in-stock item within 30 days in original, unopened packaging for a full refund (excluding shipping and fees).
- 12-Month Warranty: Covers defects in materials or workmanship; excludes misuse, normal wear, or unauthorized modifications.
- Worldwide Shipping: We ship via USPS, UPS, FedEx, and DHL. Delivery times vary by country and may be subject to customs or import fees.
- Support & Contact: Technical and warranty assistance is available anytime. Contact us here: Contact.
- Purchase Guidance: Check product specifications and compatibility carefully before ordering to ensure proper application.
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