Yokogawa NFAI135-S51 Analog Input Module

The Yokogawa NFAI135-S51 is an advanced Analog Input Module, engineered to handle 4 to 20 mA signals with isolated channels. This module ensures precise, reliable input/output performance, making it ideal for a range of industrial automation applications. Furthermore, its isolated channels safeguard system integrity by preventing interference between signals.

Key Features:

• Model: NFAI135
• Number of Channels: 8 input channels, all isolated
• Input Signal: 4 to 20 mA (current input)
• Allowable Input Current: Up to 25 mA
• Accuracy: ±0.1% of full scale
• Data Refresh Cycle: 10 ms
• Step Response Time:
  • Input: 100 ms
  • Output: Not applicable
• Withstanding Voltage:
  • Between input/output and system: 500 V AC for 1 minute
  • Between channels: 500 V AC for 1 minute
• Power Supply: 20.2 to 29.3 V DC for the transmitter
• Temperature Drift: Max. ±0.01%/°C
• Maximum Current Consumption:
  • 360 mA (5 V DC)
  • 450 mA (24 V DC)
• HART Communication: Available for advanced configuration and diagnostics

Additional Features:

• Overcurrent Protection: The module incorporates a built-in overcurrent protection circuit to prevent damage.
• Input Resistance:
  • Power ON: 250 Ω
  • Power OFF: ≥500 kΩ
• External Connections: Connect using pressure clamp terminals or MIL connector cables.
• Weight: 0.3 kg
• Fallback Function:
  • HOLD: Maintains output when fallback is detected.
  • SETV: Outputs a specified value when fallback is detected.
  • Fallback detection time: 4 seconds

• Usage Notes:
  • HART Communication: Supports bidirectional communication with field devices for easy configuration and troubleshooting. See the GS 34P02Q53-01E manual for detailed HART specifications.
  • Power Supply: A 24 V DC analog field power supply is required for proper module operation.
  • Zener Barriers: Do not use Zener barriers. Use an isolation barrier for intrinsically safe applications to avoid electrical hazards.

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Models and Suffix Codes

• Model: NFAI135 (Analog Input Module, 8 channels, isolated)
• Suffix Codes:
  • -S: Standard type
  • 5: No explosion protection
  • 1: With ISA Standard G3 option

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Contact Us

• Phone: +86-15915488782
• Email: [email protected]
• WhatsApp: +8615915488782
• Business Hours: 24/7 service
• Address: Unit 601, Powerlong International Center, No. 1599 Luling Road, Siming District, Xiamen City, Fujian, China

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