1771-CFMK – Allen-Bradley PLC 5 Flowmeter Module
Product Overview
The 1771-CFMK from Allen-Bradley is a configurable flowmeter module for the PLC 5 series. It provides 4 inputs and 4 outputs in a single slot. This module handles rate calculation and high-speed totalizing. It works with magnetic pickup flowmeters, DC pulse, and proximity probes. The 1771-CFMK supports PLC-2, PLC-3, PLC-5, and PLC-5/250 processors. It is a reliable interface for flow and turbine metering applications.
Key Technical Specifications
- Brand: Allen-Bradley / Rockwell Automation
- Model: 1771-CFMK
- Series: PLC 5
- Inputs: 4 configurable channels
- Outputs: 4 (solid-state)
- Backplane Current: 1 Amp max
- Power Dissipation: 2 W (min) to 13 W (max)
- Thermal Dissipation: 6.8 BTU/h (min) to 54.2 BTU/h (max)
- Operating Temp: 0 to 60 °C
Input & Output Details
Each of the 4 input channels accepts magnetic pickup (50 mV to 200 VAC), DC pulses (4–40 VDC), or proximity probes (compatible with Bently Nevada 3300). You can configure each channel as flowmeter input or gate input. The 4 outputs have a maximum on-state voltage drop of 0.6 Ohms x current and leakage current below 300 µA at 40 VDC.
Compatibility & Integration
This module interfaces with Allen-Bradley PLC-2, PLC-3, PLC-5, and PLC-5/250 processors via block-transfer. It fits a single 1771 I/O chassis slot. The 1771-CFMK can operate as a standard CFM module, or replace QRC/QRD modules. It supports TTL-compatible open collector inputs and works with Bently Nevada 3300 transducer systems.
Installation & Maintenance
Install the module in any 1771 chassis slot. Ensure proper backplane connection. No external power supply is needed. The module draws 1 Amp from the backplane. For maintenance, simply remove and replace the module. Status LEDs help with quick diagnostics. The module operates reliably in industrial environments from 0 to 60 °C.
Diagnostics & Status
- LED indicators for module status and channel activity
- Block-transfer data provides diagnostic information
- Configurable for rate or totalizing modes
- Automatic fault detection on inputs and outputs
Typical Applications
Automotive manufacturing, food and beverage processing, power management, and oil/gas industries. Ideal for flow metering, turbine metering, and high-speed totalizing. Use in batch control, custody transfer, and process monitoring systems.
Environmental & Certifications
- Operating temperature: 0 to 60 °C
- Compatible with standard industrial environments
- Meets Rockwell Automation quality standards
- CE marked (per manufacturer specifications)
Why Buy From Oiltech Controls?
- 15+ years of experience in industrial automation spares
- Global shipping with FedEx, UPS, DHL
- Tested surplus and refurbished options available
- 12-month warranty on all products
- Technical verification before every shipment
- Expert support for obsolete and legacy control systems
Package Contents
- 1771-CFMK Flowmeter Module
- Installation instructions (digital)
- Product datasheet (downloadable)
Frequently Asked Questions
Q: What processors are compatible?
A: PLC-2, PLC-3, PLC-5, and PLC-5/250 series.
Q: Can I use this module with a Bently Nevada 3300 probe?
A: Yes, it directly supports proximity probe inputs from Bently Nevada 3300 systems.
Q: Does it support high-speed totalizing?
A: Yes, it handles both rate calculation and high-speed totalizing applications.
Q: What is the output leakage current?
A: Less than 300 µA at 40 VDC.
Q: Is the module suitable for food and beverage applications?
A: Yes, it is used in food, beverage, and many other industrial processes.
Ordering & Shipping
GTIN and part number: 1771-CFMK. Weight: approx. 1.2 kg. Ships via FedEx, UPS, or DHL. Contact us for a shipping quote.
12-Month Warranty – Every module is tested and verified before shipment. We guarantee reliable performance.
Contact Information: For inquiries, email info@oiltechcontrols.com or call +86 158 8020 0923 (WhatsApp).
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