Allen-Bradley 1756-IF6I | ControlLogix 6-Point Isolated Analog Input Module

Product Overview

The Allen-Bradley 1756-IF6I is a six-channel isolated analog input module designed for ControlLogix systems. It supports both voltage and current input signals while offering high-resolution signal conversion. Equipped with real-time sampling, wire-off detection, process alarms, and rate alarms, this module ensures reliable operation in industrial automation and process control applications.

Key Features

• Input Channels: 6 individually isolated inputs
• Supported Signal Types: Voltage (+/-10.5V, 0-10.5V, 0-5.25V) and Current (0-21mA)
• Resolution: 16-bit
  • ±10.5V → 343 µV/bit
  • 0-10.5V → 171 µV/bit
  • 0-5.25V → 86 µV/bit
  • 0-21mA → 0.34 µA/bit
• Conversion Method: Sigma-Delta ADC
• Data Format:
  • Integer Mode (Left Justified, 2’s Complement)
  • IEEE 32-bit Floating Point
• Backplane Power Consumption:
  • 5V → 250 mA
  • 24V → 100 mA
• Max Power Dissipation:
  • Voltage Mode → 3.7 W
  • Current Mode → 4.3 W
• Terminal Block Compatibility: 1756-TBNH, 1756-TBSH

Advanced Features

This module provides multiple advantages for industrial applications. Real-time sampling (RTS) allows periodic scanning of input channels, ensuring accurate data collection. Additionally, the wire-off detection feature helps identify disconnected input channels, preventing potential issues. Process alarms alert users when input values exceed configured limits, while rate alarms detect sudden changes between input samples. Moreover, digital filters are integrated to minimize signal noise and enhance stability.

Applications

The 1756-IF6I module is widely used in industrial process automation to measure and control various parameters, including:

• Pressure, Level, Temperature, Flow, Speed
• Viscosity, Vibration, Turbidity
• Other process variables

It integrates seamlessly with instruments such as transmitters, transducers, strain gauges, potentiometers, and indicators. Thanks to its versatility, it plays a crucial role in automation systems.

Lifecycle & Availability

• Product Status: Discontinued / Obsolete
• UPC: 10612598164643
• UNSPSC: 32151705
• Replacement: Consult Rockwell Automation for alternatives

Final Thoughts

The Allen-Bradley 1756-IF6I delivers high-precision signal processing for ControlLogix systems. Featuring multiple input ranges, advanced filtering, diagnostics, and real-time data sampling, it remains a valuable solution for process control and automation applications. However, since it is discontinued, users should consider available replacement options from Rockwell Automation.

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