B&B Electronics 232BRC manual Operation, Port Configurations

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Chapter 2: OPERATION

Each port receives data from its connected device, buffers the data, and sends it out the opposite port when that port’s handshaking indicates it is ready to receive data. Each port is set to match the requirements of its connected device through the setup software.

Unused output handshake lines are held high by the 232BRC. Pin 6 (DSR) on Port A and Pin 4 (DTR) on Port B are held in a constant true state. This provides a constant enabled signal to connected devices that need it, or provides a positive voltage to devices that derive their power from these lines.

Port Configurations

The 232BRC provides a dedicated UART to ports A and B. This allows each port to be individually configured for baud rate, number of data bits, parity, and hardware (RTS/CTS) or software (XON/XOFF) handshaking. Configuration parameters are set through the setup software.

Baud rate:

Each port supports the following standard baud rates: 300 600 1200 2400 4800 9600

19.2k

38.4k

57.6k

or 115.2 kbps

In addition, non-standard baud rates between 300 and 115.2 kbps can also be set. The 232BRC uses a 1.152 MHz clock for its base data rate, so any rate that can be evenly divided into 1.152 MHz can be set exactly.

For example:

28.8 kbps = 1.152 MHz / 40

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Baud rates that are not evenly divisible into 1.152 MHz can also be used, but the actual baud rate will vary slightly from the requested rate. This may or may not cause data errors, depending on the attached equipment. Most standard UARTs can accept a 5% to 10% difference in baud rate before errors occur.

For example:

Desired Baud Rate = 20 kbps 1.152 MHz / 20 kbps = 57.6

Actual Rate = 1.152 MHz / 58 = 19.862 kbps %error = (20 kbps – 19.862 kbps) / 20 kbps * 100 %error = 0.7%

Data bits:

Each port can be configured for Five, Six, Seven or Eight data bits. NOTE: If the ports are set up differently, the port set for fewer data bits cannot transmit the upper most significant bits.

Parity:

Each port can be configured for Even, Odd, or No parity. The parity should be selected to match the connected device.

Stop Bits:

Each port can be configured for one or two stop bits. The stop bits should be selected to match the connected device.

Flow Control:

Hardware(RTS/CTS) Handshaking:

Each port can be independently configured to hold data until its input handshake line goes high. On Port A, pin seven (RTS) would have to be held high by the connected device in order for the 232BRC to send data. On Port B, pin eight (CTS) needs to be held high by the connected device for the 232BRC to send data.

Connected devices can prevent data from being sent from the 232BRC by holding their corresponding handshake lines low. This corresponds to pin seven on Port A and pin eight on Port B. See Appendix A for a complete table of signal directions.

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232BRC-3903 Manual

B&B Electronics Mfg Co Inc – 707 Dayton Rd - PO Box 1040 - Ottawa IL 61350 - Ph 815-433-5100 - Fax 815-433-5104

B&B Electronics Mfg Co Inc – 707 Dayton Rd - PO Box 1040 - Ottawa IL 61350 - Ph 815-433-5100 - Fax 815-433-5104

B&B Electronics Ltd – Westlink Commercial Park – Oranmore, Galway, Ireland – Ph +353 91 792444 – Fax +353 91 792445

B&B Electronics Ltd – Westlink Commercial Park – Oranmore, Galway, Ireland – Ph +353 91 792444 – Fax +353 91 792445

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Contents 232BRC-3903 Manual Cover RS-232 Baud Rate Converter CETable of Contents Supplied Accessories Floppy Diskettes SpecificationsDefault Parameters IntroductionChecklist Operation Port ConfigurationsPort Connections DTE/DCE Port DiagramsLED Indicators Software Installation Setup SoftwareSoftware Uninstall IntroductionCopying Parameters Between Units Setup TutorialMain Screen Final System Installation Appendix a Cable Charts Chart A.8. DTE PC DB25 Connector to Port B DTE Chart A.6. DCE Modem DB25 Connector to Port B DTE 232BRCChart A.7. DTE PC DB9 Connector to Port B DTE 232BRC-3903 Manual Appendix B Appendix B Block Diagram232BRC-3903 Manual Appendix C Appendix C Declaration of Conformity

232BRC specifications

B&B Electronics is renowned for its high-quality industrial communication solutions, and one of its standout products is the B&B Electronics 232BRC. This device plays a crucial role in serial data communication, especially in environments where robust and reliable connections are essential.

The B&B Electronics 232BRC is a serial-to-serial converter that facilitates the connection and communication between devices that utilize different serial protocols. It serves as a bridge for devices that may not otherwise be compatible, enabling seamless data exchange in various applications, from industrial automation to telemetry systems.

One of the main features of the 232BRC is its ability to support both RS-232 and RS-422/485 protocols, making it versatile for use in multiple scenarios. The device is capable of automatic baud rate detection, which simplifies the setup process and ensures that users can quickly establish a connection without the need for extensive configuration. This feature is particularly beneficial in dynamic environments where devices may frequently be added or removed.

In addition to multi-protocol support, the 232BRC is engineered with built-in signal regeneration. This capability enhances data integrity by restoring signals that may have degraded during transmission, ensuring that the data received remains accurate and reliable. This feature makes it an ideal choice for long-distance communication, where signal attenuation can be a significant concern.

The device is also designed for ruggedness, featuring an industrial-grade housing that protects it from dust, moisture, and temperature variations that are common in factory settings. This durability ensures a long service life, reducing maintenance and replacement costs for organizations.

Moreover, the 232BRC offers extensive power options, including the ability to draw power directly from the data lines, which can simplify installation in environments where power sources are limited.

Advanced LED indicators provide users with real-time feedback on the status of the device, assisting in troubleshooting and ensuring smooth operations.

In summary, the B&B Electronics 232BRC is a highly efficient and reliable solution for serial communication challenges. Its support for multiple protocols, signal regeneration, rugged design, and user-friendly features make it an indispensable tool for industries that depend on consistent and accurate data transmission. Whether used in manufacturing, transportation, or remote monitoring, the 232BRC stands out as a preferred choice for professionals seeking dependable communications solutions.