The Allen-Bradley 1771-CFMK flowmeter module delivers precise rate calculation and high-speed totalizing for demanding industrial environments. This single-slot I/O module interfaces seamlessly with Allen-Bradley processors like the PLC-5. It is purpose-built for critical applications in automotive, food and beverage, and oil and gas industries. The 1771-CFMK module accepts four input channels for magnetic pickups or DC pulses. Its four outputs feature a low on-state voltage drop for reliable signal switching.
Expert Technical Evaluation & Performance Review
The 1771-CFMK module operates in three distinct modes to suit your system needs. It works as a standard CFM module or as a direct replacement for QRC and QRD modules. Each of its four input channels supports magnetic pickups at 50 millivolts to 200 Volts AC. It also handles 4 to 40 Volts DC pulses with open-collector inputs. The module accepts proximity probes compatible with Bently Nevada 3300 systems. This flexibility makes it a powerful choice for turbine metering and flow measurement.
Power management is efficient with a peak dissipation of 13 Watts. The module draws just 1 Amp from the chassis backplane. Thermal dissipation reaches a maximum of only 54.2 BTU per hour. This ensures stable operation within a temperature range from 0 to 60 degrees Celsius. The unit performs rate calculation or high-speed totalizing with exceptional accuracy. Engineers trust this module for its reliable block-transfer data handling.
Comparative Analysis & Alternative Matrix
The 1771-CFMK stands out as a versatile upgrade for legacy systems. It directly replaces the QRC and QRD modules without requiring a full system overhaul. This saves significant time and cost during panel upgrades. Unlike simpler modules, it offers four configurable input channels for different sensor types. Its output stage delivers a maximum on-state voltage drop of just 0.6 Ohms. Leakage current stays below 300 microamps at 40 Volts DC, ensuring clean signals.
This module also shows broad compatibility across multiple PLC generations. It works with PLC-2, PLC-3, PLC-5, and PLC-5/250 family processors. Older flowmeter modules may lack this level of processor support. The 1771-CFMK provides a clear path for modernizing plant floor controls. Its robust design handles automotive and power management environments easily. You get a proven solution that integrates with existing infrastructure without complex reengineering.
Logistics & Standard Packaging Details
