CS1W-SCB41-V1 | Omron SYSMAC CS1 Serial Communication Board

Product Overview

The Omron CS1W-SCB41-V1 is a high-performance Serial Communication Board designed specifically for the SYSMAC CS1 series PLC. Unlike external communication modules that occupy a standard I/O slot, the CS1W-SCB41-V1 is an inner board that mounts directly into a dedicated "inner board slot" on the CS1G/H CPU unit. This integration saves valuable rack space while providing a versatile dual-port communication interface: one RS-232C port and one RS-422A/485 port. It is a critical component for industrial systems requiring complex data exchange with bar code readers, vision systems, temperature controllers, and third-party PLCs. With its integrated Protocol Macro function, the board can execute custom communication sequences independently of the CPU's ladder program, significantly reducing scan time and simplifying code management.

Technical Configuration

The CS1W-SCB41-V1 architecture is designed to handle multiple communication protocols simultaneously without overloading the main processor.

• Dual Port Versatility: Port 1 (RS-232C) is ideal for short-range point-to-point HMI or device connections, while Port 2 (RS-422A/485) supports multi-drop networks up to 500 meters.

• Protocol Macro Function: Allows engineers to create custom data exchange "macros" using the CX-Protocol software. This enables the PLC to communicate with almost any serial device using simple "PMCR" instructions in the ladder logic.

• Multiple Operating Modes: Supports Host Link (SYSMAC WAY), No-protocol (RS-232C/422A streaming), NT Link (for 1:N HMI connection), and Modbus-RTU slave modes.

• High-Speed Data Exchange: The board communicates with the CPU via a dedicated internal bus, ensuring that serial data buffers are refreshed at peak efficiency.

• V1 Enhancement: The "-V1" designation signifies upgraded hardware compatibility and enhanced reliability over the original non-V1 version, ensuring stability in modern CS1 environments.

Technical Specifications

Technical FAQs

How do I select between RS-422A and RS-485 on Port 2?

The selection is made using a combination of hardware DIP switches located on the side of the board and software settings in the PLC Setup. For RS-485 (2-wire), you must also bridge the appropriate terminals on the block.

Can this board be used in a CJ1 or CJ2 series PLC?

No. The CS1W-SCB41-V1 is an Inner Board specifically designed for the physical form factor of the CS1 series. For CJ-series PLCs, you must use the CJ1W-SCU series modules which mount on the standard bus.

What is the benefit of the Protocol Macro over "No-protocol" mode?

In "No-protocol" mode, the CPU must manually parse every byte, which is labor-intensive for the ladder program. The Protocol Macro handles checksums, retries, and frame headers autonomously; the CPU only needs to send or receive the raw data variables.

Engineering & Installation Guide

• Electrostatic Discharge (ESD) Warning: Since this is an internal board without a protective plastic housing, it is extremely sensitive to ESD. Always wear a grounded wrist strap and ensure the PLC power is completely disconnected before opening the CPU cover to insert the board.

• Termination Resistors: When using Port 2 in an RS-422A/485 multi-drop network, ensure the termination resistor switch on the board is set to ON only if the board is at either physical end of the communication cable. Incorrect termination is the most common cause of "Frame Error" faults.

• Cable Shielding: Always use high-quality shielded twisted-pair cables for Port 2. Connect the shield to the "GR" (Ground) terminal on the board to drain electromagnetic interference, especially when the cable runs near Variable Frequency Drives (VFDs) or heavy contactors.