Product Overview

The Yokogawa NFAI135-S50/CCC01 serves as a high-integrity current input interface for the STARDOM FCN/FCJ autonomous controller series. This module features 8 individually isolated channels, specifically engineered to capture 4–20 mA signals from critical field transmitters in demanding industrial environments. In applications involving complex process control—such as the auxiliary monitoring of steam turbines or centrifugal compressors—this module delivers exceptional noise immunity and signal fidelity. By isolating each channel from the system bus and from neighboring channels, the NFAI135-S50/CCC01 prevents ground loops and eliminates the risk of a single field fault propagating through the entire control rack. Its rapid 10ms data refresh cycle ensures that the controller receives real-time data, enabling precise regulation of high-speed industrial processes.

Technical Configuration

The NFAI135-S50/CCC01 utilizes a detailed suffix structure to define its electrical characteristics and physical connection interface.

Model Suffix Breakdown

NFAI135: Basic Model Code for the 8-channel isolated analog current input module.

-S: Identifies the Standard Type, providing full compatibility with the FCN/FCJ control logic and standard process monitoring functions.

5: Specifies the Protection Level. This code denotes the "Basic" variant intended for non-hazardous locations where explosion protection is not a requirement.

0: Indicates the standard functional configuration for the base hardware.

/CCC01: Designates a specialized connection kit. This suffix confirms the inclusion of a MIL connector cable equipped with a protective cover, designed to enhance mechanical durability and simplify wiring in high-density cabinets.

Technical Specifications

Installation Guide

To maintain signal integrity and ensure long-term hardware reliability, engineers must follow specific wiring and mounting protocols.

Wiring and Connection

Utilize the provided MIL connector cable to interface with the field signals. The protective cover included with the /CCC01 version shields the terminal pins from dust and accidental contact. When connecting 2-wire transmitters, the module provides up to 25 mA per channel; ensure your field devices stay within the 20.2 to 29.3 V DC supply range to prevent undervoltage errors.

Noise Mitigation

Route analog signal cables through dedicated conduit, separate from high-voltage AC power lines. While the 500 V AC isolation protects the module, maintaining a minimum separation of 100mm from noise-generating equipment (like VFDs) further reduces signal jitter. Ensure the MIL connector is seated firmly and locked to prevent intermittent signal loss due to vibration.

Redundancy and Expansion

In critical loops, consider utilizing redundant configurations where supported by the FCN base unit. This ensures that the process remains online even if a single module requires maintenance.

Engineering Advantages

The NFAI135-S50/CCC01 excels in environments where electrical noise and variable ground potentials typically compromise signal accuracy. Its channel-to-channel isolation is a critical advantage for systems spanning large distances or involving multiple power sources. The rugged hardware design handles the high thermal loads of industrial cabinets without degradation, maintaining a low temperature drift of ±0.01% per °C. This stability ensures that the calibrated accuracy of the system remains consistent across varying seasonal temperatures. Furthermore, the high input resistance when powered off (≥ 500 kΩ) protects your field loops during maintenance periods or unexpected power failures.

Shipping and Delivery

Delivery Time: 3-5 business days upon payment finish.

Carrier Partners: Global express delivery via DHL, FEDEX, or UPS.

Product Condition: Brand New, Original Factory Sealed, Export Packaging.

Technical FAQs

Q1: What is the specific benefit of the /CCC01 suffix?

A1: The /CCC01 suffix provides a MIL connector cable with a protective cover. This is specifically designed for high-density wiring environments where space is limited and physical protection of the connector pins is necessary for long-term reliability.

Q2: Does this module provide power to my field transmitters?

A2: Yes. The NFAI135-S50/CCC01 includes a built-in transmitter power supply (20.2 to 29.3 V DC), allowing it to power standard 2-wire 4-20mA loops directly.

Q3: Can I use this module for 0-20mA signals?

A3: This module is optimized for 4-20mA current signals. While it can detect current up to 25mA, the accuracy and internal diagnostics are calibrated for the standard 4-20mA range.

Q4: How does the "Individual Isolation" help during a field fault?

A4: Because every channel is isolated, a short circuit or high-voltage surge on one transmitter will be contained within that single channel. It will not damage the other 7 inputs or the main CPU module.