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
Selecting the Right Cables for Industrial Automation: A Comprehensive Guide
Selecting the appropriate cabling infrastructure is critical for the success of any industrial automation project. Improper cable selection often leads to signal degradation, system instability, and costly downtime. As an automation engineer, I frequently see projects compromised by poor cabling choices in harsh industrial environments. This guide simplifies the complex landscape of cabling to help you make informed decisions for your PLC, DCS, and control systems.
Preventing Spurious Trips in Emergency Stop Systems: A Technical Guide
In industrial automation, the Emergency Stop (E-Stop) pushbutton is the ultimate safety line. However, relying on a single Normally-Closed (NC) contact can sometimes lead to unexpected spurious trips. As a control systems engineer, I have seen these nuisance trips halt entire production lines, causing significant downtime. Understanding why these components fail and how to implement robust architecture is essential for any reliable DCS or PLC-based safety system.
Sequencing Induction Motor Control with PLC Logic: Best Practices
In modern industrial automation, controlling a group of induction motors requires precision and safety. Uncontrolled simultaneous startup of multiple large motors often causes significant voltage dips, potentially triggering protective trips. Therefore, implementing a sequential startup and shutdown strategy is essential. This approach minimizes inrush current and ensures the system operates within established power constraints. A robust PLC program serves as the ideal engine for orchestrating these sequences.