Technical Description

The NFAR181-S00 S2 is a high-precision RTD (Resistance Temperature Detector) input module designed for Yokogawa CENTUM VP and ProSafe-RS control systems. It provides accurate temperature signal acquisition by directly interfacing with various RTD sensors, including Pt100 and JPt100 types.

As part of the FIO (Field Interface Option) I/O family, the module offers 12 input channels within a compact form factor while maintaining low power consumption and high measurement stability. The NFAR181-S00 S2 incorporates advanced signal conditioning to reduce the effects of lead-wire resistance and electromagnetic interference, ensuring consistent temperature measurements even in electrically noisy industrial environments.

The S2 suffix indicates a specific hardware revision within Yokogawa’s product lifecycle, ensuring compatibility and long-term reliability for mission-critical thermal monitoring applications.

Technical Specifications

Operational Applications

The NFAR181-S00 S2 is widely used in power generation plants, petrochemical refineries, and chemical processing facilities where precise temperature monitoring is critical to safe and efficient operation.

With its 12-channel capacity, the module is well suited for multi-point temperature monitoring, such as in reactors, distillation columns, boilers, and steam turbine systems. The built-in high-integrity isolation and signal conditioning help maintain measurement accuracy even in environments with high electrical noise or varying ground potentials.

Frequently Asked Questions

Does this module support 2-wire or 4-wire RTD sensors?
The NFAR181-S00 S2 is optimized for 3-wire RTD connections, which provide a good balance between measurement accuracy and installation cost. While 4-wire RTD sensors may be connected, the additional wire is typically not used for compensation in this configuration.

What is the significance of the S2 designation?
The S2 suffix indicates a specific hardware revision within Yokogawa’s product series. When performing maintenance or replacements, it is recommended to use the same or a compatible revision to maintain system stability.

Is the module suitable for hazardous locations?
Yes. When installed in a compatible Yokogawa FIO rack, the module typically meets international hazardous area standards, including Zone 2 or Division 2 installation requirements.