Overview

The YOKOGAWA NFAI841-S50 Analog I/O Module is a versatile device designed for industrial automation applications. It provides both input and output channels for analog signals, making it suitable for various process control tasks.

Technical Specifications

General

• Model: NFAI841-S50
• Number of I/O Channels: 8-channel input/8-channel output, non-isolated

I/O Signal

• Input: 4 to 20 mA
• Output: 4 to 20 mA

Input Characteristics

• Allowable Input Current/Voltage: 25 mA — ±7.5 V
• Overcurrent Protection: Provided
• Input Resistance:
  • Power ON: 250 Ω
  • Power OFF: 500 kΩ or more
• Allowable Load Resistance: 0 to 750 Ω
• Circuit-Open Detection: 0.65 mA or less
• Accuracy: ±0.1% of full scale
• Data Refresh Cycle: 10 ms
• Input Step Response Time: 100 ms

Output Characteristics

• Output Step Response Time: 40 ms
• Output Fallback: Set for each channel
• Transmitter Power Supply: 22.8 to 26.4 V (output current limit: 27 mA)
• Setting of 2-wire or 4-wire Transmitter: For each channel by setting pin

Other

• Temperature Drift: Max. ±0.01 %/°C
• Maximum Current Consumption: 310 mA (5 V DC), 500 mA (24 V DC)
• Weight: 0.3 kg
• External Connection: Pressure clamp terminal, MIL connector cable