Allen‑Bradley 1771‑IFMS Analog Input Module

The Allen‑Bradley 1771‑IFMS is a multi‑channel high‑resolution analog input module for Allen‑Bradley PLC‑5 1771 chassis system. It acquires field analog signals and converts them into digital data for the PLC‑5 controller to realize process measurement and closed‑loop control.

This module supports multiple signal ranges with built‑in signal filtering and fault detection functions, adapting to complex industrial field interference environments. It is a common spare part for maintenance and retrofit of legacy PLC‑5 automation cabinets.

Main Specifications

• Brand: Allen‑Bradley; Model:1771‑IFMS; Type: Analog Input Module
• Applicable System: PLC‑5 series with 1771 back‑plane chassis
• Signal Type: Multi‑channel voltage and current analog input
• Function: Analog‑digital conversion, signal filtering and process data transmission
• Installation: Slot‑mounted inside 1771 PLC rack
• Operating Environment: 0℃ ~ +60℃, 5%‑95% RH non‑condensing
• Certifications: CE, compliant with industrial PLC automation standards

Core Functions

• Collect temperature, pressure, flow rate and other field analog measurement signals.
• Complete analog‑digital conversion and filter high‑frequency interference from industrial site.
• Transmit converted digital data to PLC‑5 CPU for process closed‑loop regulation.
• Detect over‑range and channel abnormal conditions and feed back alarm status.
• Backplane bus connection for convenient plug‑and‑play replacement during maintenance.
• Support channel configuration and calibration with legacy Allen‑Bradley programming software.

Application Scenarios

• Legacy production line control cabinets based on Allen‑Bradley PLC‑5 platform.
• Signal acquisition units for chemical, metallurgy and water‑treatment industries.
• Retrofit and spare replacement of legacy 1771 series PLC automation platforms.
• Preventive maintenance and fault repair projects for industrial control equipment.
• Spare parts inventory for automation integrators and engineering contractors.

• Global aftermarket spare supply for technical teams maintaining Allen‑Bradley industrial hardware.