Product Description

The NFAI135-S50/CCC01 is a high-density current input module designed for the Yokogawa Electric Corporation CENTUM VP integrated production control system.

This module provides 16 fully isolated channels for direct acquisition of 4–20 mA DC signals from field transmitters. Individual channel isolation eliminates ground loop interference and ensures high-precision, stable measurements in electrically challenging industrial environments.

The “S50” suffix indicates standard environmental specification, while the “/CCC01” option denotes a conformal coating that protects the module from corrosive gases and high humidity, making it suitable for harsh processing environments such as chemical plants and refineries.

Technical Specifications

Application and Reliability

The NFAI135-S50/CCC01 is commonly used for monitoring critical process variables such as:

• Pressure

• Flow

• Level

Its high-speed sampling, robust isolation, and hot-swappable design allow for reliable operation and maintenance without interrupting Field Control Station (FCS) activities. It is especially suited for control loops requiring signal stability and accuracy in harsh industrial environments.

Engineering FAQ

Does the NFAI135-S50/CCC01 provide loop power to transmitters?
No. This is a sink-type current input module. Two-wire transmitters requiring loop power must use an external 24 V DC supply or a dedicated distributor module.

What is the purpose of the /CCC01 option?
The /CCC01 conformal coating meets the G3 environmental standard, protecting the module from corrosive agents such as hydrogen sulfide ($H_2S$), chlorine, and other chemical vapors.

Can this module be used for voltage inputs?
No. The NFAI135 is strictly a current input module. For voltage signal acquisition, use a compatible model such as the NFAV series.