Yokogawa NFAI841-S00 CENTUM VP 8-Channel Analog Input Module

Product Overview

The Yokogawa NFAI841-S00 functions as a high-precision analog input module within the CENTUM VP Distributed Control System (DCS) architecture. This 8-channel module captures diverse process signals by supporting both voltage (±10 V) and current (±20 mA) ranges. It utilizes a 16-bit A/D converter to ensure superior resolution for mission-critical monitoring and control tasks. We supply this unit as 100% Brand New and Original, providing a factory-certified solution for demanding automation environments where signal integrity defines process success.

Part Number Breakdown

The NFAI841-S00 follows Yokogawa's structured nomenclature for high-resolution I/O modules:

Technical Specifications

The NFAI841-S00 maintains high-fidelity signal conversion across an extended operational temperature window.

• Number of Input Channels: 8 independent channels.

• Input Signal Range: ±10 V (Voltage) / ±20 mA (Current).

• A/D Conversion Resolution: 16-bit.

• Sampling Rate: 50 Hz.

• Input Impedance: 10 MΩ.

• Power Consumption: 2.5 W.

• Operating Temperature: -20 to 60°C (-4 to 140°F).

• Dimensions: 110 mm x 35 mm x 100 mm.

• Weight: 300 g (10.58 oz).

• Condition: Guaranteed 100% Brand New and Original.

Engineering Advantages

The NFAI841-S00 provides targeted technical solutions for high-performance DCS integration:

• Ultra-High Input Impedance: The 10 MΩ input impedance minimizes loading effects on field transmitters. This ensures the module captures the true voltage potential of the sensor without degrading signal accuracy, even over long-distance cable runs.

• High-Resolution 16-bit Conversion: Standard modules often lack the granularity required for precise analytical measurements. The 16-bit architecture of the NFAI841-S00 resolves minute process changes, providing the DCS with the high-fidelity data necessary for advanced control algorithms.

• Extended Thermal Resilience: While standard industrial hardware fails at temperature extremes, this module operates reliably down to -20°C and up to 60°C. This robustness allows for installation in remote instrument enclosures or non-climate-controlled cabinets without risking signal drift.

• Versatile Signal Compatibility: The ability to handle both bipolar voltage and current signals on a single module reduces hardware complexity. Engineers can configure individual channels to match specific field device outputs, simplifying spare parts management and cabinet design.

FAQs

• Can the NFAI841-S00 handle standard 4-20 mA signals?

  Yes. The ±20 mA input range fully accommodates standard 4-20 mA signals. You simply configure the software scale within the CENTUM VP engineering station to match your field transmitter's output range.

• Does this module provide isolation between channels?

  The NFAI841-S00 features galvanic isolation to protect the system backplane from field transients. This prevents ground loops from migrating through the DCS, ensuring that an electrical fault on one loop remains localized.

• Is the 50 Hz sampling rate sufficient for fast control loops?

  The 50 Hz rate provides a 20ms update interval, which exceeds the requirements for most industrial temperature, level, and flow control loops. It maintains the deterministic response time necessary for CENTUM VP control stations.

• Is this a brand new original Yokogawa part?

  Absolutely. We supply only 100% Brand New hardware. This NFAI841-S00 arrives in its original factory packaging with matching serial numbers and intact manufacturer seals, guaranteeing zero prior field usage.