Allen Bradley AB 12 Bit Analog Input Module 1771-IFE /A

Allen-Bradley 1771-IFE/A 12-Bit Analog Input Module

The Allen-Bradley 1771-IFE/A is a 12-bit analog input module designed for integration with PLC-5 systems, facilitating precise analog signal processing in industrial automation applications.

Key Features

• Input Channels: Supports up to 16 single-ended or 8 differential inputs, offering flexibility in signal configuration.
• Input Ranges: Accommodates various voltage and current inputs:
  • Voltage: 0 to 5V DC, ±5V DC, 0 to 10V DC, ±10V DC
  • Current: 0 to 20mA, ±20mA, 4 to 20mA
• Resolution: Provides a 12-bit binary resolution, ensuring accurate signal conversion.
• Accuracy: Maintains an accuracy of 0.1% of full-scale range at 25°C, ensuring reliable measurements.
• Data Formats: Supports Natural Binary or BCD scaling to ±9999, allowing compatibility with various data processing requirements.

Technical Specifications

• Module Location: Occupies a single slot in a 1771 I/O chassis.
• Backplane Current Load: Draws 750 mA at +5V DC from the I/O chassis backplane.
• Power Dissipation: Maximum of 2.5 Watts, with a thermal dissipation of 8.52 BTU/hour.
• Input Impedance: Over 10 MΩ for voltage ranges; 250 Ω for current ranges.
• Common Mode Rejection: 80 dB from DC to 120 Hz, enhancing signal integrity.
• Environmental Conditions:
  • Operating Temperature: 0 to 60°C (32 to 140°F)
  • Storage Temperature: -40 to 85°C (-40 to 185°F)
  • Relative Humidity: 5 to 95% (non-condensing)

Installation and Configuration

The 1771-IFE/A module is designed for easy installation into any Allen-Bradley Universal I/O Chassis, such as the 1771-A1B, 1771-A2B, 1771-A3B, or 1771-A4B. It is recommended to place analog input modules away from AC or high-voltage DC modules to minimize electrical noise interference. The module features internal jumpers for configuring each input channel as either current or voltage input, with selectable ranges per channel.

Applications

This module is ideal for process measurement applications, including temperature, pressure, level, flow, pH, viscosity, and vibration monitoring. It effectively converts various process variable signals into proportional PLC data values, suitable for monitoring and control purposes.

Indicators and Diagnostics

The front panel includes a green RUN indicator and a red FAULT indicator. Upon power-up, the module performs a self-check; if no faults are detected, the red FAULT indicator turns off, and the green RUN indicator flashes until successful communication with the processor is established.

For detailed installation and configuration instructions, refer to the 1771-IFE Installation Instructions and User Manual.