Allen-Bradley | 1756-IF8 | ControlLogix (1756 Series)

Product Description: Allen-Bradley 1756-IF8

The Allen-Bradley 1756-IF8 is an 8-channel differential analog input module designed for ControlLogix systems. It supports both voltage and current input signals, offering high resolution and configurable input ranges for industrial applications requiring precise analog signal acquisition. This module is ideal for integrating sensors, transmitters, and instrumentation into large-scale automation systems, where accuracy and scalability are essential.

Key Features

• 8 differential analog input channels
• Supports voltage and current input types
• User-selectable input ranges:
  • Voltage: ±10V, 0–10V
• 16-bit resolution for accurate signal measurement
• Per-channel configuration and scaling via Studio 5000
• Channel status and fault detection (open circuit, under/over-range)
• Requires compatible RTB (e.g., 1756-TBCH, 1756-TBNH)
• Compatible with all ControlLogix chassis and controllers

Technical Specifications

• Number of Channels: 8
• Input Type: Differential (voltage or current)
• Input Ranges:
  • ±10V, 0–10V
• Resolution: 16 bits
• Accuracy: ±0.05% of full scale (typical)
• Input Impedance:
  • Voltage: >1 MΩ
• Isolation Voltage: 250V (channel-to-backplane and channel-to-channel)
• Backplane Current Draw:
  • 120 mA @ 5.1V DC
• Operating Temperature: 0°C to 60°C
• Mounting: ControlLogix chassis (any I/O slot)
• Certifications: UL Listed, CE, CSA, RoHS, Class I Div 2

Application Areas

• Process control (temperature, pressure, level, flow)
• Analog data acquisition in factory automation
• SCADA systems and distributed control
• Oil & gas, chemical, and water treatment plants
• OEM machinery with analog sensing requirements

Advantages

• High-density analog input with flexible configuration
• Accurate and reliable signal capture
• Channel- isolated design reduces noise and improves integrity
• Easy integration with Studio 5000 for diagnostics and scaling
• Ideal for mixed voltage/current input environments