1771-CFM – Configurable Flow Meter Module
Allen‑Bradley / Rockwell Automation · PLC‑5 series · 4 inputs / 4 outputs
Specialized I/O module for flow and speed calculation. Interfaces with turbine meters, magnetic pickups, and TTL pulse sources.
Description
- Manufacturer: Rockwell Automation
- Brand: Allen‑Bradley
- Part number: 1771‑CFM
- Series: PLC‑5
- Module type: Configurable flow meter / specialized I/O
- Slots: 1 slot
- Backplane current: 1.0 A max
- Wiring arm: 1771‑WN
- Weight: 0.9 kg (1.9 lb)
- Coating: Conformal coat
Technical Specifications
Inputs & Outputs
- Digital inputs: 4 channels
- Input types: Magnetic pickup (50 mV‑200 V AC peak), TTL‑compatible (4‑40 V DC), Proximity (Bently 3300 5 & 8 mm)
- Digital outputs: 4 (5‑40 V DC, user‑supplied)
- Max input frequency: 100 kHz
- Max count value: 0 to 9,999,999 (programmable)
Performance & Environment
- Module scan time: 1.3‑5 ms
- Max processing time: 5.5 ms
- Power dissipation: 2‑13 W
- Operating temperature: 0‑60 °C (32‑140 °F)
- Storage temperature: ‑40‑85 °C (‑40‑185 °F)
- Dimensions (H×W×D): 89×165×51 mm (3.5×6.5×2.0 in)
Modes & Compatibility
- Operating modes: Non‑resettable totalizer, totalizer, high‑resolution frequency (ch 0/1 or 2/3), direction sensor (ch 0/1 or 2/3)
- Direct replacement: 1771‑QRC and 1771‑QRD (no ladder logic change)
- Diagnostics: Sends diagnostic info to PLC processor in configuration block
Installation, Maintenance & Compatibility
- Mounting: Single slot, PLC‑5 chassis
- Wiring: Use 1771‑WN wiring arm
- Programming: Configuration block in ladder logic
- Diagnostic: Module sends diagnostic words to processor
- Compatibility: PLC‑5 series; replaces 1771‑QRC/QRD
Applications & Diagnostic FAQ
- Typical applications: flow metering, turbine meters, shaft speed calculation, pipelines, power generation, oil & gas, automotive, food & beverage.
- Diagnostic capability: configuration block provides real‑time diagnostic words.
- FAQ – No input signal? Check magnetic pickup wiring and input type selection.
- FAQ – Output not responding? Verify user‑supplied DC voltage (5‑40 V).
- FAQ – Replacement? Direct swap for 1771‑QRC/QRD without logic changes.
Packaging, Shipping & Warranty
- Package includes: 1771‑CFM module, wiring arm (1771‑WN) – sold separately
- Shipping carriers: FedEx, UPS, DHL (worldwide)
- Warranty: 12‑months from delivery
- Returnability: Yes
- Country of origin: US
Why Buy From Oiltech Controls?
- ✓ 15+ years in industrial automation spare parts
- ✓ Global shipment support – fast & reliable
- ✓ Tested industrial surplus / refurbished options
- ✓ 12‑month warranty on all modules
- ✓ Technical verification before shipment
- ✓ Support for obsolete control systems
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