Products Description
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Allen-Bradley 1771-CFM PLC-5 Configurable Flowmeter Module – Technical Specifications and FAQ
Technical Specifications
| Parameter | Specification |
|---|---|
| Brand | Allen-Bradley (Rockwell Automation) |
| Model | 1771-CFM |
| Product Type | Configurable Flowmeter Module |
| Product Series | PLC-5 / 1771 I/O |
| Function | Flow measurement, pulse counting, frequency measurement and totalization |
| Number of Input Channels | 4 digital inputs |
| Number of Output Channels | 4 digital outputs |
| Input Signal – Magnetic Pickup | 50 mV–200 V AC peak |
| Input Signal – DC / TTL Compatible | 4–40 V DC |
| Compatible Sensors | Magnetic pickups, turbine flowmeters, single-channel shaft encoders and Bently Nevada 3300 5 mm / 8 mm proximity pickups |
| Maximum Input Frequency | 100 kHz |
| Maximum Count Value | 9,999,999 |
| Digital Output Voltage | 5–40 V DC, externally supplied |
| Backplane Current | 1.0 A maximum |
| Module Scan Time | 1.3–5 ms, depending on configuration and frequency |
| Configuration Processing Time | 5.5 ms maximum for configuration changes |
| Chassis Slot Requirement | 1 slot |
| Compatible Chassis | 1771-A1B, 1771-A2B, 1771-A3B, 1771-A3B1 and 1771-A4B |
| Wiring Arm | 1771-WN |
| Protective Coating | Conformal coating |
| Operating Temperature | 0 to 60°C |
| Storage Temperature | -40 to 85°C |
| Relative Humidity | 5–95%, non-condensing |
| Dimensions (H × W × D) | Approx. 283 × 35 × 145 mm; estimated module dimensions |
| Weight | Approx. 0.48 kg |
| Country of Origin | United States (official Rockwell Automation listing; actual manufacturing location may vary) |
FAQ
FAQ
Q1: What is the Allen-Bradley 1771-CFM used for?
A: It is a configurable flowmeter module used in PLC-5 systems to measure flow rates, count pulses, monitor shaft speed and perform totalization.
Q2: How many input and output channels does the 1771-CFM have?
A: It provides four digital input channels and four digital output channels.
Q3: What input signals does the 1771-CFM support?
A: It accepts signals from magnetic pickups, turbine flowmeters, shaft encoders and compatible Bently Nevada 3300 proximity pickups.
Q4: What is the maximum input frequency?
A: The module supports input frequencies up to 100 kHz.
Q5: Which wiring arm is compatible with the 1771-CFM?
A: The specified wiring arm is the Allen-Bradley 1771-WN.
Q6: Which PLC chassis are compatible with the 1771-CFM?
A: It is designed for PLC-5 1771 I/O chassis, including 1771-A1B, A2B, A3B, A3B1 and A4B.
Q7: What are the dimensions and weight of the 1771-CFM?
A: The estimated dimensions are approximately 283 × 35 × 145 mm (H × W × D), and the weight is approximately 0.48 kg, excluding packaging. Confirm the physical dimensions with the supplier before shipment.
Q8: Is the 1771-CFM still available?
A: No. Rockwell Automation officially discontinued the 1771-CFM on March 20, 2019. It may still be available through surplus inventory and industrial automation spare-parts suppliers.
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Packing & Delivery
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