Overview

The NFAR181-S50 is an isolated input module designed for industrial applications. It supports various types of input signals, making it versatile for a wide range of monitoring and control tasks.

Technical Specifications

• Number of Input Channels: 12, isolated

• Input Signal Types:

  • Thermocouples (TC): Type J, K, E, B (*1), R, S, T (JIS C1602:1981, IEC60584:1977)
  • Millivolts (mV): -100 to 150 mV, -20 to 80 mV
  • RTDs (Resistance Temperature Detectors): Pt100 (three-wire type) (JIS C 1604:1989, IEC 60751:1986, JPt100)

• Switching Input Signals: TC/mV can be set individually for each channel (CH1 to CH16)

• Allowable Input Voltage: ±5 V

• Withstanding Voltage: 1500 V AC for 1 minute (between input and system)

• Input Resistance:

  • Power ON: 2 MΩ or more
  • Power OFF: 2 MΩ or more

• Accuracy:

  • Thermocouple Inputs: ±0.03% of full scale (for -20 to 80 mV)
  • mV Inputs: ±0.032% of full scale (for -100 to 150 mV)
  • RTD Inputs: ±0.03% of full scale (for 0 to 400 Ω)

• Allowable Total Resistance of Signal Source Plus Wiring:

  • TC/mV: 1000 Ω or less
  • RTD: 40 Ω or less (wiring resistance per wire)

• Effect of Allowable Signal Source Resistance: ±20 μV (1000 Ω)

• Reference Junction Compensation Accuracy: Within ±1°C

• Measurement Current: 1 mA (RTD)

• Temperature Drift:

  • Thermocouple Inputs: Max. ±30 ppm/°C
  • mV Inputs: Max. ±32 ppm/°C
  • RTD Inputs: Max. ±30 ppm/°C

• Data Refresh Cycle: 1 sec

• Burn-out Detection: All channels can be set together (detection time: 60 seconds)

• Maximum Current Consumption: 450 mA (5 V DC)

• Weight: 0.2 kg

• External Connection: Pressure clamp terminal