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1756-IR6I

Allen-Bradley 1756-IR6I ControlLogix 6-Point Isolated RTD Input Module

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  • Manufacturer: Allen-Bradley

  • Product No.: 1756-IR6I

  • Product Type: Analog RTD Module

  • Product Origin: USA

  • Payment:T/T, Western Union

  • Weight: 320g

  • Shipping port: Xiamen

  • Warranty: 12 months

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Bayani

Allen-Bradley 1756-IR6I ControlLogix RTD Input Module

The Allen-Bradley 1756-IR6I is a high-precision, temperature-measuring analog input module for the ControlLogix platform. Featuring six individually isolated channels and a 16-bit resolution architecture, this lightweight 0.32 kg module interfaces with 3-wire and 4-wire RTD sensors to deliver accurate thermal tracking in demanding process environments.

Key Advantages

  • Channel-to-Channel Isolation: Six fully independent isolated sensor circuits eliminate ground loop risks and prevent cross-channel signal corruption.
  • Dual Processing Modes: Supports baseline integer conversion as well as advanced 32-bit floating-point execution with temperature linearization and process/rate alarming.
  • Intelligent Diagnostics: Embedded with under-range/over-range detection, programmable digital notch filters, and real-time wire-off loop sensing.

Technical Specifications

Input Points 6 Individually Isolated Channels (20-pin faceplate)
Supported RTD Types Platinum (100, 200, 500, 1000 Ω; α=385/3916), Nickel (100, 120, 200, 500 Ω; α=672/618), Copper (10 Ω)
Analog Resolution 16 bits (7.7 mΩ/bit at 487 Ω max, 15 mΩ/bit at 1000 Ω max, 30 mΩ/bit at 2000 Ω max, 60 mΩ/bit at 4020 Ω max)
Module Scan Speeds 10 ms min (Integer Mode) / 25 ms min (Floating Point Ohms) / 50 ms min (Floating Point Temp)
Backplane Current Draw 250 mA at 5.1 VDC / 125 mA at 24 VDC (Total Power Dissipation: 4.3 Watts max)
Operating Scope & Weight 0°C to 60°C (32°F to 140°F) / Net Module Weight: Approx. 0.32 kg

Quick Installation

  • Chassis Placement: Align and firmly slide the module into any available local or remote I/O slot within the ControlLogix chassis.
  • Terminal Block Setup: Wire the sensors using a compatible 1756-TBNH or 1756-TBSH 20-pin Removable Terminal Block (RTB).
  • Multicast Configuration: Establish the proper Requested Packet Interval (RPI) and Real-Time Sampling (RTS) parameters to enable deterministic data multicasting.

Technical FAQs

Q1: What are the differences between Integer and Floating-Point data formats?
A1: Integer mode limits scaling data but processes raw readings much faster. Floating-Point mode utilizes the full internal processing library to support temperature linearization, rate alarms, and engineering unit scaling.

Q2: How does the module handle inherent line noise or minor resistance variances?
A2: A built-in digital notch filter minimizes plant electrical field noise, while an integrated 10-ohm copper offset feature compensates for small layout errors on sensitive copper RTD loops.

Q3: How does the wire-off detection feature operate?
A3: The wire-off diagnostic checks loop completeness continuously. If a connection on the terminal block is loosened or a field wire breaks, a system fault flag activates instantly to avoid inaccurate control loops.

Product Resources

📄 Download PDF
🏷️ Tags: Analog RTD Module

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