The RS232 Multi Computer Adapter from Wiesemann & Theis is a versatile interface solution for industrial and office applications. It allows two serial data sources (e.g., PCs) to share access to a peripheral device such as a printer, plotter, hand scanner, or card reader. With three RS232 ports—one DTE port and two DCE ports—along with flexible switching modes and individually configurable interface parameters, it delivers maximum compatibility and ease of use.

Its industrial-grade construction, DIN rail mounting, high immunity according to EN 61000‑6‑2, and flexible power supply up to 24 V make the adapter ideal for use in control cabinets within Industry 4.0 and automation environments.

Flexible switching modes

The adapter supports three operating modes:

• Automatic switching mode: “First come, first served” – ideal when two PCs alternately access one device.
• Manual switching mode: Controlled via buttons on the device – useful for controlled access (e.g., card reader in an access system).
• Splitter mode: Data from the master port is simultaneously sent to both slave ports – suitable for logging or parallel data analysis.

The integrated data return channel enables bidirectional communication, allowing devices such as hand scanners or printers to send status messages back.

Baud rate conversion and parameter matching

A special feature is the baud rate converter function. All three RS232 interfaces can be configured independently (baud rate, data format, handshake protocol). This allows devices with different fixed communication parameters to interact seamlessly.

Examples:

• Connecting a legacy system operating at 9600 baud to a modern device with 115,200 baud.
• Adapting data formats between control systems and external readers.
• Correct handshake implementation to prevent data loss or buffer overruns.

Industrial design and DIN rail mounting

Designed for use in industrial control cabinets, the housing is optimized for DIN rail mounting. This provides:

• Space‑saving installation
• Neat cable organization
• Simple maintenance

Power supply and energy efficiency

The adapter is powered via an external screw terminal with up to 24 V input. This allows flexible integration into existing industrial power systems. The energy‑efficient design ensures reliable continuous operation.

Note: A power supply unit is not included.

Diagnostics and configuration

To simplify commissioning, the adapter includes built‑in diagnostic functions such as a settings dump that allows current configuration values to be read out. This makes fault analysis and configuration easier in complex environments.

Standards and certifications

The adapter complies with:

• EN 61000‑6‑2 – Immunity
• EN 55032:2015 + A1 Class B – Emissions
• EN 61000‑3‑2 / EN 61000‑3‑3 – Electromagnetic compatibility

CE and UL certifications confirm suitability for international use in both office and industrial environments. Wiesemann & Theis offers a five‑year warranty.

Typical applications

• Building management: Shared use of one card reader by two access systems.
• Industrial automation: Two controllers sharing a common plotter.
• Office environment: Automatic switching between two PCs using the same RS232 printer.
• Machine data logging: Using splitter mode to distribute production data to two analysis devices.

Versatile interface solution for serial communication

The RS232 Multi Computer Adapter from Wiesemann & Theis provides maximum flexibility for sharing a peripheral device between two data sources. With automatic, manual, and splitter switching, independent baud rate configuration, and industrial DIN rail mounting, it is the ideal solution for advanced serial communication in Industry 4.0, automation, and building management applications.