The NI cFP-RTD-122 is an 8-channel single-ended RTD input module for direct measurement of 2- and 3-wire Resistance Temperature Detector signals in industrial environments. Built on the Compact FieldPoint platform, it delivers high-accuracy temperature monitoring with HotPnP operation, automatic engineering unit scaling, and integrated self-diagnostics. The module combines a 16-bit delta-sigma ADC with true three-wire lead resistance compensation and 50/60 Hz notch filtering for reliable remote temperature monitoring and control applications.
Technical Specifications
• Channels: 8 single-ended inputs
• RTD Compatibility: 2-wire and 3-wire configurations; 100 Ω and 1,000 Ω platinum RTDs
• Resistance Ranges: 0–400 Ω or 0–4,000 Ω
• Temperature Ranges: 73–1123 K, −200 to 850 °C, −328 to 1562 °F
• ADC Resolution: 16-bit
• Excitation Current: 0.25 mA pulsed per channel
• Linearization: Six built-in TCR values: 3.750, 3.851, 3.911, 3.916, 3.920, 3.928 mΩ/Ω/°C
• Lead Compensation: True three-wire compensation
• Noise Rejection: Integrated 50 and 60 Hz notch filter
• Power Consumption: 350 mW from network module
• Isolation: 2,300 Vrms optical bank isolation; 250 Vrms double-insulation operational isolation
– Key Features
• HotPnP plug-and-play integration with automatic configuration
• Automatic scaling to temperature or resistance engineering units
• NIST-traceable calibration certificates included
• Green POWER and READY status indicators
• Compact form factor: 5.0 × 3.5 × 1.0 inches, 3.7 oz
– Environmental & Operating Conditions
• Operating Temperature: −40 to 70 °C
• Storage Temperature: −55 to 85 °C
• Humidity: 10–90% non-condensing
• Vibration: 5 grms random (10–500 Hz); 5 g sinusoidal (10–500 Hz)
– Compatibility & Integration
Designed for Compact FieldPoint backplanes and platform ecosystems supporting embedded industrial control, data logging, headless operation, and Ethernet connectivity.
