Technical Specifications:

• Model Code: NFAI841-HE0
• Number of Channels: 8 channels
• Input Types:
  • Thermocouple (TC): Type J, K, T, E, R, S, B, N
  • RTD: Pt100 (JIS), JPt100 (IEC), Cu50
• Measurement Range (Thermocouple):
  • Type K: -200°C to +1370°C
  • Type J: -210°C to +1200°C
  • Type T: -200°C to +400°C
  • Type E: -200°C to +900°C
  • Type R/S: 0°C to +1760°C
  • Type B: 0°C to +1820°C
  • Type N: -200°C to +1300°C
• Measurement Range (RTD):
  • Pt100: -200°C to +850°C
  • Cu50: -50°C to +150°C
• Resolution: 16-bit A/D converter (0.01°C resolution for Pt100)
• Accuracy:
  • Thermocouple: ±0.1% of span + 1 digit
  • RTD: ±0.15% of span + 1 digit
• Cold Junction Compensation (CJC): Built-in, accuracy ±0.5°C
• Scan Time per Channel: 100 ms (all 8 channels)
• Isolation: Channel-to-channel isolation, 500 VDC
• Power Supply Voltage: 24 VDC (±20%)
• Power Consumption: ≤ 3.0 W
• Operating Temperature Range: 0°C to +55°C
• Storage Temperature Range: -20°C to +70°C
• Relative Humidity: 5% to 95% RH (non-condensing)
• Dimensions (W × H × D): 25 mm × 90 mm × 78.5 mm
• Weight: Approximately 150 g
• Mounting Method: DIN rail (35 mm) mounting

Functional Features:

• Simultaneous thermocouple and RTD input on different channels
• Built-in linearization tables for all standard TC and RTD types
• Break-wire detection function for thermocouple channels
• Burnout detection for RTD channels (opens/shorts)
• Channel-to-channel galvanic isolation for noise immunity
• Supports FA-M3 ladder logic and function block programming

Structural Features:

• DIN rail-mountable plastic/metal hybrid housing
• Pluggable terminal blocks for easy sensor wiring
• LED indicators: PWR, RUN, ERR, CH1–CH8 (per channel status)
• DIP switches for channel configuration (TC/RTD type selection)

Applicable Industries:
Oil & Gas, Petrochemical, Power Generation, Steel Manufacturing, Pharmaceutical, Food & Beverage, Semiconductor

Installation Requirements:

• Use thermocouple extension wire of matching type (e.g., Type K TC with Type K extension wire)
• Use 3-wire or 4-wire RTD connection for best accuracy
• Keep sensor wiring away from power cables (minimum 100 mm separation)
• Install surge protection devices on TC lines in high-EMI environments

Precautions:

• Do not mix different thermocouple types on the same module
• Verify cold junction compensation is enabled for TC inputs
• Maximum lead wire resistance for RTD: 100 Ω (3-wire), 50 Ω (4-wire)
• Do not apply voltage > 30 VDC to any input channel