Yokogawa NFAR181-S50/R8S10 12-Channel RTD Input Module

Overview

The Yokogawa NFAR181-S50/R8S10 is a 12-channel RTD input module built for STARDOM FCN/FCJ autonomous controllers.
It handles Pt100 sensors in a 3-wire configuration for precise temperature monitoring.
Each channel is independently isolated, improving noise immunity and signal reliability.
In addition, the module supports cold junction compensation, burn-out detection, and a 1-second update rate.

Technical Specifications

Input Specifications

• Input Type: RTD (Pt100, 3-wire)

• Number of Channels: 12 (isolated per channel)

• Input Range: –200°C to +800°C

• Measurement Current: 1 mA

• Accuracy:

• RTD: ±0.15°C or ±0.03% FS (0–400 Ω)

• TC: ±0.03% FS (–20 to 80 mV)

• mV: ±0.032% FS (–100 to 150 mV)

• Cold Junction Compensation: Yes (TC inputs only)

• Burn-out Detection: Enabled for all channels (60 seconds)

Electrical Characteristics

• Input Resistance: ≥2 MΩ (Power ON/OFF)

• Allowable Input Voltage: ±5 V

• Temperature Drift:

• RTD: ±0.01%/°C

• TC/mV: ±30 ppm/°C

• Withstand Voltage:

• Input ↔ System: 1500 V AC for 1 minute

• Between Channels: 500 V AC for 1 minute

Power Supply

• 5 V DC: Max 450 mA

• 24 V DC: Max 400 mA

Mechanical Details

• Mounting: DIN rail or panel mount

• Dimensions: 482 mm (W) × 210 mm (H) × 220 mm (D)

• Weight: 0.6 kg

Environmental Ratings

• Operating Temperature: –20°C to +70°C

• Humidity: 5% to 95% RH (non-condensing)