Allen-Bradley 1771-CFM | Digital Flow Meter Module for PLC

Product Description – Allen-Bradley 1771-CFM Configurable Flowmeter Module

Overview

The Allen-Bradley 1771‑CFM is a configurable flowmeter module designed for PLC‑5 systems, enabling precise measurement of flow, shaft speed, and RPM. It converts frequency or pulse signals from field devices into actionable data for industrial controllers. Moreover, the module supports multiple inputs and outputs, making it suitable for complex monitoring applications. Although discontinued, it remains a trusted solution in legacy automation systems.

Technical Specifications

Model Number: 1771‑CFM
Type: Configurable Flowmeter I/O Module
System Compatibility: Allen‑Bradley PLC‑5 chassis
Number of Channels: 4 digital inputs/outputs
Input Signal Types: Frequency signals from turbine flowmeters, magnetic pickups, shaft encoders
Input Voltage Range: 5–40 V DC
Output Channels: 4 digital outputs
Functions: Frequency measurement, pulse counting, RPM/shaft speed monitoring
Dimensions (H × W × D): 11.12 × 14.3 × 2.17 inches
Weight: 1.9 lbs (0.86 kg)
Mounting: PLC‑5 chassis slot
Operating Temperature: 0 °C to +60 °C
Storage Temperature: –40 °C to +85 °C
Certifications: CE, UL, CSA
Lifecycle Status: Discontinued
Country of Origin: USA
Application Areas: Flow monitoring, turbine measurement, shaft speed/RPM monitoring in industrial automation

FAQ

Q1: What type of inputs does the 1771‑CFM support?
A1: It supports frequency signals from turbine flowmeters, magnetic pickups, and shaft encoders.

Q2: How many digital outputs are available?
A2: The module provides four digital outputs operating at 5–40 V DC.

Q3: Can this module still be used in legacy PLC‑5 systems?
A3: Yes, it remains compatible with existing PLC‑5 chassis and applications.

Q4: Is the 1771‑CFM module still manufactured?
A4: No, it has been discontinued since March 20, 2019.

Q5: What industries commonly use this module?
A5: Oil & gas, petrochemical, power generation, and manufacturing plants frequently use it.