RS232 Universal Serial Buffer

RS232 Universal Serial Buffer by Wiesemann & Theis

The RS232 Universal Serial Buffer by Wiesemann & Theis is a versatile solution for buffering and converting serial data, equipped with a non-volatile 4 MB flash memory. It enables secure storage of data such as telephone call charges, print and plot data, or machine data even during power failures, and supports conversion of transmission parameters such as baud rate, data format, and handshake method. With two independently configurable RS232 interfaces, the buffer is ideal for applications where devices with different interface parameters need to be connected. The industrial design with DIN rail mounting, high immunity according to EN 61000-6-2, and flexible power supply up to 24 V make it perfect for industrial control cabinets. The buffer supports bidirectional communication, offers integrated diagnostic and commissioning aids, and can be optionally equipped with RS422, RS485, or 20mA interface modules. With a five-year warranty, the RS232 Universal Serial Buffer provides a reliable solution for applications in Industry 4.0, automation technology, and charge data management. This article highlights the technical features, applications, and advantages of the RS232 Universal Serial Buffer.

Non-volatile Data Buffering and Application Examples

The RS232 Universal Serial Buffer is equipped with a 4 MB flash memory that enables non-volatile buffering of serial data, even during power outages. This is particularly useful in scenarios where data is generated continuously but cannot be evaluated immediately, such as recording call charge and call data from telephone systems. In a typical use case such as buffering telephone charge data, a telephone system supplies call data via the RS232 interface, which would normally require a continuously connected PC running a reception program. The buffer reliably stores this data so that the PC can be temporarily turned off or used for other tasks. The data can later be read out using a Wiesemann & Theis software tool into text or Excel files or integrated into billing software via simple 3-byte query sequences. This non-volatile storage protects valuable data from loss and makes the buffer ideal for applications such as telephone billing, print and plot data, or machine data in Industry 4.0. The capability to connect bidirectional peripherals expands the possible uses, for example for printers or scanners which require return channel communication.

Conversion of Serial Transmission Parameters

Another core feature of the RS232 Universal Serial Buffer is its function as a baud rate converter. When two devices with different, non-configurable transmission parameters (baud rate, data format, handshake protocol) need to be connected, the buffer enables seamless communication. The two RS232 interfaces can be configured independently so that data received on one port can be converted into the format of the second device and forwarded. Even downward baud rate conversion is possible thanks to the 4 MB memory, while the configured handshake method controls data flow and prevents memory overflows. For example, an older device operating at 9600 baud can be connected via the buffer to a modern system at 115,200 baud without data loss. This flexibility makes the buffer ideal for applications where legacy systems need to be combined with modern devices, such as automation technology or building management. On request, the interfaces can also be equipped with RS422, RS485, or 20mA modules to extend compatibility with special industrial requirements.

Management and Connectivity

The RS232 Universal Serial Buffer offers a variety of features that expand its application possibilities in industrial and office environments. The non-volatile storage allows secure buffering of data such as print and plot data, telephone charge information, or machine data, while the data return channel supports bidirectional peripherals such as printers or scanners. The independently configurable interfaces allow adjustment of baud rate, data format, and handshake protocol, making the buffer a flexible solution for connecting heterogeneous systems. The integrated diagnostic and commissioning aids, such as the settings dump, facilitate configuration and troubleshooting. The DIN rail enclosure allows easy installation in industrial control cabinets, while the flexible power supply up to 24 V enables integration into various industrial power sources. This combination of flexibility, diagnostic features, and industrial design makes the buffer ideal for applications in Industry 4.0 where reliable data communication and storage are essential.

Power Supply and Energy Efficiency

The RS232 Universal Serial Buffer is powered via an external supply up to 24 V connected via a pluggable screw terminal. This wide supply voltage range offers flexibility in industrial environments where different power sources may be available. The energy-saving architecture of the buffer minimizes power consumption, making it environmentally friendly and cost-effective. The non-volatile storage in the 4 MB flash memory ensures that data is retained even during power failures, enhancing reliability in critical applications such as telephone charge management or machine data acquisition. These features make the buffer especially suitable for scenarios where stable power supply and data security are crucial, such as production facilities or building management systems.

Please note: The power supply is not included in the delivery.

Standards Compliance and Reliability

The RS232 Universal Serial Buffer meets stringent standards for immunity (EN 61000-6-2) and emissions (EN 55032:2015 + A1 Class B, EN 61000-3-2, EN 61000-3-3), qualifying it for use in residential, commercial, and industrial environments. Its high immunity ensures reliable operation even in environments with electromagnetic disturbances, such as manufacturing plants or control centers. CE marking and UL certification confirm suitability for international applications, while the robust construction is designed for continuous operation. With a five-year warranty, the buffer provides a low-maintenance and durable solution for professional users. The combination of non-volatile storage, flexible conversion, and industrial-grade design provides additional safety and stability, especially in demanding industrial scenarios.

Versatile Applications

The RS232 Universal Serial Buffer is ideal for applications where serial data needs to be reliably buffered or transmission parameters need to be converted. In billing applications, the buffer stores telephone charge data from telephone systems so that a PC does not need to be permanently connected. For example, the buffer can store call data in a call center and later integrate it into billing software without data loss. In automation technology, the buffer enables connection of devices with different baud rates, e.g., between an old sensor running at 9600 baud and a modern controller at 115,200 baud, without data loss. In Industry 4.0, the buffer supports acquisition and buffering of machine data to ensure reliable data transfer even during temporary connection interruptions. In print and plot data processing, the buffer stores data from printers or plotters to avoid bottlenecks. The DIN rail mounting makes the buffer suitable for industrial control cabinets, while the option for RS422, RS485, or 20mA interfaces increases compatibility with special industrial requirements. The buffer is versatile, ranging from building management to manufacturing plants.

Advantages of Flexible Configuration and DIN Rail Mounting

The independently configurable interfaces of the RS232 Universal Serial Buffer enable flexible adjustment of baud rate, data format, and handshake protocol, facilitating the integration of heterogeneous systems. The integrated diagnostic and commissioning aids, such as the settings dump, simplify configuration and troubleshooting. The DIN rail enclosure allows simple and stable mounting in industrial control cabinets where space and order are crucial. The non-volatile storage and support for bidirectional communication make the buffer especially user-friendly and versatile. This combination of flexibility, robust construction, and high reliability is particularly advantageous in environments where fast and reliable solutions are demanded, such as in industry or automation technology.

Reliable and Versatile Solution for Serial Data Buffering

The RS232 Universal Serial Buffer by Wiesemann & Theis impresses with its ease of use, high reliability, and standards compliance. With 4 MB flash memory, flexible conversion of transmission parameters, DIN rail mounting, and non-volatile storage, it is the ideal solution for applications in billing, automation technology, and Industry 4.0. The five-year warranty underlines the durability and quality of this compact solution.