Product Details
Product Description
The Allen Bradley 1771-IL is an isolated analog input module designed for legacy PLC-5 systems. It provides eight fully isolated differential channels, supporting both voltage and current input ranges. With high accuracy, auto-calibration, and robust isolation, this module ensures precise signal acquisition in demanding industrial environments.
Technical Specifications
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Manufacturer Allen Bradley
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Product Line PLC-5 Series
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Module Type Analog Input Module
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Part Number 1771-IL
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Number of Inputs 8 isolated differential channels
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Input Voltage Ranges +1 to +5 V DC, 0 to +5 V DC, ±5 V DC, ±10 V DC
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Input Current Ranges +4 to +20 mA, 0 to +20 mA, ±20 mA
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Resolution 16-bit binary across full range
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Accuracy (Voltage) Typical 0.01%, Max 0.05% @ 25 °C
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Accuracy (Current) Typical 0.06%, Max 0.1% @ 25 °C
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Backplane Current 1.3 A
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Data Format Natural Binary or BCD
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Channel Update Time 500 ms for 8 channels
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Internal Scan Rate 50 ms
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Chassis Compatibility All 1771 I/O chassis
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Wiring Arm 1771-WG
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Mounting 1-slot rack mountable
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Isolation 1000 V between channels
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Functional Highlights Auto-calibration, jumper-selectable voltage/current mode, open-circuit detection, overvoltage protection, block transfer instructions (BTW/BTR), LED indicators for diagnostics
Application Scenarios
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Precision analog signal acquisition in legacy PLC-5 systems
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Industrial processes requiring isolated differential inputs
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Environments where high accuracy and robust isolation are critical
FAQ
Q: How many channels does the 1771-IL provide? A: It supports 8 fully isolated differential input channels.
Q: What input ranges are supported? A: Voltage ranges include ±10 V, ±5 V, 0–5 V, and +1–5 V. Current ranges include 0–20 mA, +4–20 mA, and ±20 mA.
Q: Is the module compatible with all PLC-5 chassis? A: Yes, it can be installed in any 1771 I/O chassis.
Q: How often should calibration be performed? A: Auto-calibration is integrated, but periodic verification is recommended for critical applications.
Comparable Models
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1771-IL: 8-channel isolated analog input module (this model)
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1771-IFE: Non-isolated analog input module for standard applications
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1771-IR: Resistance input module for specialized sensor measurements
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.
Tech & Buying Guide
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Why 24V DC Power Supplies Standardize Modern Industrial Automation
Industrial control cabinets worldwide rely on 24V DC as the universal power standard for field instrumentation, sensors, and controllers. Walk into any manufacturing plant, and you will find PLCs, human-machine interfaces (HMIs), and smart actuators running on extra-low voltage DC. Standardizing on 24V DC enhances operational safety, lowers cabinet footprint, and maintains steady control performance across factory networks.
Essential Motion Control Commands: A Practical Guide for Engineers
Automation engineers often rely on precise position and speed control to drive modern factory machinery. Modern industrial systems, such as Programmable Logic Controllers (PLCs) and Distributed Control Systems (DCS), depend heavily on standardized motion instructions. Mastering these commands ensures operational safety, protects mechanical components, and optimizes cycle times across production lines.