1756-CFM | AB Allen Bradley | Configurable Flowmeter Module

Product Summary

The 1756-CFM is a ControlLogix Configurable Flow Meter module. It provides high-speed, high-accuracy flow measurement and totalization for up to 4 channels, suitable for applications requiring precise flow monitoring and control.

Core Specifications

• Catalog Number: 1756-CFM
• Module Type: Configurable Flow Meter Module
• Compatible Platform: ControlLogix (1756 chassis)
• Channels: 4 independent flow meter channels
• Input Types: Supports pulse, frequency, and analog inputs for flow measurement
• Resolution: High-resolution totalization and rate calculation

Electrical Characteristics

• Function: Flow rate calculation, totalization, and alarming per channel
• Input Frequency: Up to 100 kHz (depending on configuration)
• Isolation: Channel-to-channel and field-to-backplane isolation
• Backplane Current: Approximately 250 mA @ 5 VDC (typical)

Installation Guide

1. Install the module in any slot of a 1756 ControlLogix chassis.
2. Use a removable terminal block (RTB) for field wiring.
3. Configure each channel in Studio 5000 Logix Designer for input type, scaling, and flow calculation parameters.
4. Verify flow measurement accuracy and totalization through controller diagnostics.

Selection Guidelines

• Select 1756-CFM for applications requiring dedicated high-speed flow metering and totalization with up to 4 channels.
• For simpler pulse counting, consider standard high-speed counter modules (e.g., 1756-HSC).
• Ensure chassis power supply capacity supports the module’s backplane current draw.

Frequently Asked Questions