1756-CFM by Allen-Bradley | ControlLogix Redundant Channel I/O

Product Description – Allen-Bradley 1756-CFM ControlLogix Channel Fault Module

Overview

The Allen-Bradley 1756-CFM module is a ControlLogix I/O device designed to monitor redundant communication channels, ensuring uninterrupted operation in complex industrial systems. By detecting faults in ControlNet or other redundant networks, it allows the controller to seamlessly switch to the healthy channel. Moreover, its compact design fits easily within ControlLogix chassis, making it suitable for high-availability architectures in process automation, power generation, and petrochemical industries. The module also supports hot-swappable installation, reducing downtime during maintenance.

Technical Specifications

Model Number: 1756-CFM
Type: ControlLogix Channel Fault Module
System Compatibility: Allen-Bradley ControlLogix platform
Primary Function: Monitors redundant communication channels (e.g., ControlNet)
Diagnostics: Reports channel health and fault status to the controller
Slots Required: 1 slot in ControlLogix chassis
Power Consumption: ~2.5 W at 5.1 V DC
Isolation: Basic insulation, 30 V continuous, type tested at 500 V AC for 60 s
Dimensions (H × W × D): 145 × 35 × 140 mm
Weight: 0.3 kg
Operating Temperature: 0 °C to +60 °C
Storage Temperature: –40 °C to +85 °C
Humidity Range: 5–95% RH, non-condensing
Certifications: CE, UL, CSA, KC
Application Areas: Process automation, petrochemical plants, power generation, large-scale manufacturing systems requiring redundant communication

FAQ

Q1: What is the primary function of the 1756-CFM module?
A1: It monitors redundant communication channels and reports health status to the controller.

Q2: Which systems is this module compatible with?
A2: It is compatible with Allen-Bradley ControlLogix platforms.

Q3: Can this module be installed without shutting down the system?
A3: Yes, it supports hot-swappable installation for minimal downtime.

Q4: What is the operating temperature range for the 1756-CFM?
A4: The module operates between 0 °C and +60 °C.

Q5: In which industries is the 1756-CFM most commonly used?
A5: It is used in process automation, petrochemical plants, power generation, and large manufacturing systems.