cFP-RTD-122

National Instruments Compact FieldPoint RTD Temperature Input Module

General Description

Part Number

• Model: cFP‑RTD‑122

• NI PN: 777318‑122

Key Specifications

• Channels: 8 single‑ended RTD inputs (2/3‑wire)NI

• Sensor Types: PT100, PT1000 (and other 100 Ω/1000 Ω RTDs)

• Temperature Range: ‑200 °C to +850 °C (PT100)

• Resistance Ranges: 0–400 Ω, 0–4,000 Ω (software‑selectable)

• Resolution: 16‑bit delta‑sigma ADC (~0.016 °C typical)

• Accuracy (15–35 °C): ±0.03 Ω (400 Ω range); ±0.08 Ω (‑40 to +70 °C)

• Isolation: 2,300 Vrms bank‑to‑backplane; double‑insulated

• Update Rate: 0.93 Hz (1.08 s/all channels)

• Excitation: Constant current, per‑channel

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

• Power Consumption: 350 mW typical (from backplane)

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

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

• Calibration: NIST‑traceable certificate includedNI

Main Features

• 8‑Channel RTD Measurement: Supports both 2‑wire and 3‑wire RTDs with built‑in lead‑wire compensationNI.

• High Accuracy & Resolution: 16‑bit ADC and precise current excitation deliver 0.016 °C resolution and excellent stability.

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

• HotPnP & Auto‑Scaling: Plug‑and‑play; auto‑linearizes RTD curves (Callendar‑Van Dusen) and outputs engineering unitsNI.

• Self‑Diagnostics: Detects open/short sensors and reports via software/LEDsNI.

• Compact & Rugged: Wide temperature range, vibration resistance, and safety certifications for harsh environments.

Applications

• Precision temperature monitoring in industrial processes, HVAC, energy

• Food & beverage, pharmaceutical manufacturing (PT100/PT1000)

• Environmental monitoring and chamber temperature control

• Test stands requiring accurate, multi‑channel temperature data

• Legacy Compact FieldPoint system maintenance

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)