YOKOGAWA SC200S Communication interface module

The YOKOGAWA SC200S is a specialized communication interface module belonging to the FA-M3 (Free Application Multi-controller) family.

 It is specifically designed to handle high-speed, multi-point serial communications, often serving as a gateway between the PLC and external devices like PCs, barcode scanners, or other controllers.

1. Introduction

The SC200S (often part of the F3RS22 or F3LC series architecture) is a Personal Computer Link Module. 

Its primary function is to allow a host computer or terminal to read from and write to the FA-M3 CPU's internal registers and relay memory without requiring complex ladder programming for every transaction.

2. Technical Parameter Table

Parameter    Specification

Manufacturer    Yokogawa Electric

Model Number    SC200S

Interface Ports    2 Ports (typically RS-232-C or RS-422/485)

Communication Speed    300 bps to 115.2 kbps

Max. Cable Length    15m (RS-232-C) / 1200m (RS-422/485)

Synchronization    Start-stop (Asynchronous)

Protocol Support    PC Link, Program Download, Transparent Mode

Weight    Approx. 0.15 kg

Current Consumption    250 mA at 5V DC

3. Product Advantages and Features

Multi-Port Flexibility: Features two independent ports, allowing for simultaneous communication with an HMI on one port and a central SCADA system on the other.

Transparent Communication: Supports "non-procedural" (Transparent) mode, which allows the PLC to communicate with specialized devices like weigh scales or thermal controllers that use proprietary ASCII strings.

High-Speed Throughput: Optimized for the FA-M3V "Vitesse" engine, ensuring that data updates on the user's monitor reflect real-time machine states.

No-Programming Data Access: Using the PC Link protocol, external software can access PLC data by simply sending a command string, significantly reducing development time.

4. Application Cases

Factory Monitoring: Connecting the PLC to a central PC for data logging, production counting, and OEE (Overall Equipment Effectiveness) tracking.

Peripheral Integration: Interfacing with serial-based devices such as RFID readers, barcode scanners, and inkjet printers on a packaging line.

Remote Maintenance: Providing a dedicated port for modem or wireless bridge access to perform remote diagnostics.

Machine-to-Machine (M2M): Linking different brands of controllers via RS-485 to synchronize part-transfer signals.

5. Other Models in the Same Series

Yokogawa provides several communication modules depending on the specific physical layer or protocol required:

F3RS22-0N: The modern equivalent/base for high-speed serial communication.

F3LC11-1N: A dedicated single-port RS-232-C PC Link module.

F3LC11-2N: A dedicated single-port RS-422/RS-485 PC Link module.

F3LE11-0T: Ethernet-based communication module (the modern alternative to serial SC200S).

F3RZ81-0N: Specialized module for advanced serial protocols.

6. Related Models

If you are looking for the software or cables associated with this module, the following are often used:

SF661-MC: WideField3 programming software.

KM30-2A: Standard RS-232C communication cable for Yokogawa modules.