The RS232 Universal Serial Buffer from Wiesemann & Theis is a versatile solution for buffering and converting serial data. Equipped with a 4‑MByte nonvolatile flash memory, it protects valuable information even during power outages, making it ideal for applications in Industry 4.0, automation, and billing systems.

With two independently configurable RS232 interfaces, optional RS422, RS485, or 20 mA modules, and an industrial‑grade design, the buffer offers maximum flexibility for integration into existing systems.

Nonvolatile data buffering

The integrated flash memory ensures permanent and secure data storage, even in the event of a power failure. This is especially critical in environments where data is generated continuously:

• Call‑charge recording: Storing call data without the need for a permanently connected PC.
• Print and plot data: Preventing data loss during temporary transmission problems.
• Machine data acquisition: Ensuring complete data capture in production processes.

Stored data can be exported via the W&T software tool to text or Excel files, or imported into billing systems using a simple query sequence.

Baud rate conversion and format translation

Acting as a baud rate converter, the buffer connects devices with differing, non‑adjustable interface parameters. Each interface can be configured independently:

• Adjusting baud rates – e.g. converting from 9600 baud to 115,200 baud.
• Converting data formats.
• Modifying handshake protocols to manage data flow and prevent overflow.

The buffer can even perform down‑conversion of baud rates without data loss – ideal for linking legacy systems with modern devices.

Optional interface modules

On request, the buffer can be equipped with RS422, RS485, or 20 mA interface modules to meet specific industrial requirements. This allows easy integration into a variety of network infrastructures.

Bidirectional communication

The buffer supports bidirectional peripherals such as printers or scanners that can send back status messages or data to the source device. This makes it suitable for interactive automation and administrative applications.

Diagnostics and commissioning

For quick setup and troubleshooting, the buffer features integrated diagnostic tools such as a settings dump that displays current configurations. This simplifies installation and maintenance, especially in complex environments.

Industrial design and DIN rail mounting

The DIN‑rail housing enables compact installation in control cabinets. Key features include:

• Easy integration into industrial and technical centers
• Clean cable management
• Rugged design for continuous operation

Power supply and energy efficiency

The buffer is powered via a pluggable screw terminal supporting up to 24 V. The wide input range ensures flexible integration across systems. The energy‑efficient architecture lowers operating costs and supports environmentally friendly continuous use.

Note: A power supply unit is not included.

Standards and certifications

The buffer 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. Wiesemann & Theis provides a five‑year warranty.

Typical applications

• Telecommunications: Call‑charge recording with locally buffered PBX data.
• Industrial automation: Connecting sensors and controllers with differing baud rates.
• Building management: Integrating various peripherals with different interface settings.
• Print and plot management: Buffering output data to prevent process interruptions.

Flexible interface solution with data security

The RS232 Universal Serial Buffer provides secure, nonvolatile data buffering and interface conversion in a compact, industrial‑grade device. With optional interface modules, bidirectional communication, and 4 MB of memory, it is ideal for demanding Industry 4.0, automation, and billing applications.