cFP‑SG‑140

National Instruments Compact FieldPoint Strain/Bridge Input Module

General Description

Part Number

• Model: cFP‑SG‑140

• NI PN: 777318‑140

Key Specifications

• Channels: 8 differential strain/bridge inputs

• Sensor Types: Full‑bridge, half‑bridge strain gauges; quarter‑bridge (external completion)

• Resolution: 16‑bit delta‑sigma ADC

• Input Ranges: ±3.5, ±7.5, ±30, ±60 mV/V (with overranging)

• Excitation (per channel, programmable): 2.5 V, 5 V, 10 V DC

• Input Impedance: 20 MΩ

• Filters (software‑selectable): 15 Hz, 60 Hz, 240 Hz (low‑pass)

• Update Rate: 0.87–1.11 Hz per channel; 0.9–1.15 s all‑channels

• Isolation: 2,300 Vrms transient (bank‑to‑backplane); 250 Vrms continuous

• Connectors: 37‑pin D‑Sub (cFP‑CB‑1/CB‑3 terminal bases)

• Indicators: POWER, READY (green); 8 × channel overcurrent (red)

• Power Consumption: ~400 mW (from backplane)

• Operating Temperature: ‑40 °C to +70 °C

• Storage Temperature: ‑55 °C to +85 °C

• Humidity: 10–90% RH, non‑condensing

• Certifications: CE, UL, CSA, FM (hazardous locations)

• Calibration: NIST‑traceable certificate included

• Weight: ~105 g (3.7 oz)

Main Features

• 8‑Channel Strain Measurement: Supports full/half‑bridge strain gauges and load cells with programmable excitation.

• High Resolution & Low Noise: 16‑bit ADC and selectable low‑pass filters ensure precise, stable readings.

• Flexible Input Ranges: Four mV/V ranges with overranging accommodate various sensor sensitivities.

• Industrial Isolation: 2,300 Vrms transient isolation protects against ground loops and voltage spikes.

• HotPnP & Auto‑Scaling: Plug‑and‑play; auto‑linearizes bridge signals and outputs engineering units.

• Self‑Diagnostics: Detects sensor faults (open/short) and overcurrent; reports via software/LEDs.

• Robust Industrial Design: Wide temperature range, vibration tolerance, and safety certifications.

Applications

• Structural health monitoring (bridges, buildings, towers)

• Machine condition monitoring (vibration, stress, torque)

• Industrial load/force/torque measurement (presses, cranes, test stands)

• Aerospace/automotive component testing (strain, fatigue)

• Legacy Compact FieldPoint system maintenance/expansion

Compatibility

• Terminal Bases: cFP‑CB‑1 (36‑pin), cFP‑CB‑3 (18‑pin)

• Backplanes: cFP‑BP‑x series

• Controllers: All Compact FieldPoint network modules (e.g., cFP‑2000, cFP‑2010)