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Allen-Bradley 1771-CFM/C is a high-precision flowmeter interface module for PLC systems, designed to process signals from pulse-output flowmeters (turbine, vortex, PD meters). Part of the 1771 I/O family, it features programmable scaling, totalization, and alarm functions with direct integration to PLC-5/SLC platforms. Ideal for process control and batch applications requiring accurate flow monitoring in water treatment, chemical, and oil/gas industries.
Product Specifications
Core Specifications
Input Types:
Pulse Input: 0-10kHz (5V DC, 24V DC, or dry contact)
Analog Backup: 4-20mA (optional for fault fallback)
Channels: 1 isolated flowmeter channel
Count Resolution: 32-bit totalizer (4,294,967,295 counts)
Accuracy: ±0.01% of reading (typical)
Key Functional Attributes
Flow Calculation
K-factor programming (0.001-999,999 pulses/unit)
Engineering unit conversion (GPM, L/min, m³/h, etc.)
Linearization tables (8-point curve fitting)
Alarms & Control
Communication & Integration
Instantaneous flow rate
Totalized flow
Alarm status
Mechanical/Environmental
Enclosure: 1771 modular format (NEMA 1/IP20)
Terminations: Removable screw terminals (14 AWG)
Operating Temp: -20°C to +60°C (-4°F to +140°F)
Power: 85mA @ 5V DC (backplane-powered)
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