1771-IFM

Overview

The 1771-IFM from Allen-Bradley is a Fast Millivolt Input Module designed to measure low-level millivolt signals. It features high accuracy and resolution, making it suitable for precise industrial applications.

Module Details

• Inputs per Module: 8 differential low-level inputs

• Module Location: Fits into a 1771 I/O chassis (1 slot)

Input Characteristics

• Input Voltage Range: 0 to 50 mV

• Resolution: 12-bit binary

• Accuracy: 0.1% of range at 25°C

• Linearity: ±1 LSB

• Repeatability: ±1 LSB

• Input Impedance: 1 MΩ

• Maximum Input Voltage: ±10V

• Common Mode Rejection: 100 dB DC to 60 Hz

Protection & Isolation

• Isolation Voltage: 1500V (transient)

• Input Overvoltage Protection: 32V

Current & Power

• Backplane Current: 0.75A @ +5V

Output Formats

• BCD Output: 0000 to 4095 (BCD with selectable scaling)

• Binary Output: 32767 Binary

• Engineering Units Sent to Processor: 9999 BCD

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