Yokogawa NFAI135-S50 8-Channel Isolated Analog Input Module

Description

The Yokogawa NFAI135-S50 is an 8-channel isolated analog input module designed for use with the STARDOM FCN/FCJ autonomous controllers. It accepts 4–20 mA current signals from field transmitters, making it ideal for monitoring temperature, pressure, and flow in industrial automation systems. Its high accuracy, fast response, and robust isolation make it a reliable choice for demanding environments.

Specifications

• Model Number: NFAI135-S50

• Manufacturer: Yokogawa Electric Corporation

• Input Type: Analog current input (4–20 mA)

• Number of Channels: 8 (individually isolated)

• Allowable Input Current: Up to 25 mA

• Input Resistance:

  • Power ON: 250 Ω

  • Power OFF: ≥500 kΩ

• Accuracy: ±0.1% of full scale

• Data Refresh Cycle: 10 ms

• Step Response Time: 100 ms

• Temperature Drift: Max. ±0.01%/°C

• Transmitter Power Supply:

  • Voltage: 20.2 to 29.3 VDC

  • Current Limit: 27 mA

• Withstand Voltage:

  • Input to system: 500 V AC for 1 minute

  • Channel to channel: 500 V AC for 1 minute

• Power Consumption:

  • 5 VDC: Max. 360 mA

  • 24 VDC: Max. 450 mA

• External Connections: Pressure clamp terminal or MIL connector

• Mounting: DIN rail or panel

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

• Weight: 0.3 kg

• HART Communication: Supported