Port Configurations | B&B Electronics Buffered Smart Switch manual

Port Configurations

The 232BSS4 provides a dedicated UART to all five ports. This allows any port to be individually configured for baud rate, number of data bits, parity, and hardware (RTS/CTS) handshaking. Configuration of all the ports is done through the setup software.

Baud Rate:

Each port is configurable for the following baud rates: 1200 2400 4800 9600

19.2K

38.4K

57.6K

or 115.2 kbps

Data Bits:

Each port can be configured for Seven or Eight data bits. Note: If the Master and Slaves are set up differently, the port set for Seven data bits cannot transmit the eighth bit.

Parity:

Each port can be configured for Even, Odd, or No parity. Because the Master port uses a slightly different UART, it is not capable of receiving only seven bits, thus seven data bits with no parity is not allowed on the Master port. All other configurations are possible.

Stop bits:

Each port uses 1 stop bit. This value is currently fixed and can not be changed in the setup software.

Hardware(RTS/CTS) Handshaking:

Each port can be configured to hold data until its input handshake line goes high. On the Master port, pin four (RTS) would have to be held high by the host device in order for the 232BSS4 to send data. On the Slaves, pin eight (CTS) needs to be held high by the Slave device for the 232BSS4 to send data. The connected devices can prevent data from being sent from the 232BSS4 by holding their corresponding handshake lines low.

6	Documentation Number 232BSS4-2907m

B&B Electronics Mfg Co Inc – 707 Dayton Rd - PO Box 1040 - Ottawa IL 61350 - Ph 815-433-5100 - Fax 815-433-5104 – www.bb-elec.comB&B Electronics – Westlink Commercial Park – Oranmore, Galway, Ireland – Ph +353 91-792444 – Fax +353 91-792445 – www.bb-europe.com

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B&B Electronics Buffered Smart Switch, 232BSS4 manual Port Configurations

Contents

This product designed and manufactured in Ottawa, Illinois USA Buffered Smart SwitchModel 232BSS4 of domestic and imported parts byPage APPENDIX B CABLE CHARTS Table of ContentsCHAPTER 4 SETUP SOFTWARE APPENDIX C BLOCK DIAGRAM Documentation Number 232BSS4-2907m Chapter 1 - Introduction Documentation Number 232BSS4-2907m Specifications Default Parameters The following equipment should be in the shipping carton Checklist1. RS-232 Buffered Smart Switch model 232BSS4 2. Instruction Manual 3. 2 3.5 floppy disks Documentation Number 232BSS4-2907m LED Indicators Symbols and ConventionsChapter 2 OPERATION Port Configurations Description Smart Switch Only ModeOptions Four Character Command Format Command SummaryThree Character Command Format Command Explanation Commands Select Port A to transmit and receive - “A” VB Example Table 2.2 Send Only and Clear Buffer Control Characters Table 2.3 - Timer Values commands and the Master can initiate the next communications sequence Auto Select/Smart Switch Mode Inactivity Time Using the 232BSS4 as a Buffered Splitter/Combiner Figure 2.1. Multiple Terminals to a Host Controller Back to Back Operation mux/demux Figure 2.2. Back to Back Operation Cascading Multiple Switches Figure 2.3. Expanding the Number of Slave Ports Slave Devices that Automatically Send their Data Slave Devices that Require Polling 25 Pin DTE Chapter 3 PORT CONNECTIONSDTE/DCE Explanation 25 Pin DCE Master Port Connections Slave Port Connections Introduction Chapter 4 SETUP SOFTWAREConnection Select SETTINGS, CONTROL PANEL from the Windows START menu Software InstallationSoftware Uninstall Double Click ADD/REMOVE PROGRAMS Setup Tutorial Single Unit Main Screen 26Documentation Number 232BSS42907 Manual Back to Back Main Screen 28Documentation Number 232BSS42907 Manual Copying Parameters Between Switches Default Parameters Documentation Number 232BSS42907 Manual DECIMAL to HEX to ASCII CONVERSION TABLE Appendix A ASCII Character CodesASCII Appendix A Chart B.1. DTE PC DB25 Connector to Master Port Appendix B Cable ChartsPins 6, 8, & 20 looped back internally on the 232BSS4 Chart B.2. DTE PC DB9 Connector to Master Port Appendix B Cable Charts Chart B.3. DCE Modem DB25 Connector to Master Port Pins 6, 8, & 20 looped back internally on the 232BSS4Chart B.4. DCE Modem DB9 Connector to Master Port Chart B.6. Ports A - D DTE to DTE PC DB9 Connector Pins 1, 4, & 6 looped back internally on the 232BSS4Chart B.5. Ports A - D DTE to DTE PC DB25 Connector Chart B.7. Ports A - D DTE to DCE Modem DB25 Connector Pins 1, 4, & 6 looped back internally on the 232BSS4 Chart B.8. Ports A - D DTE to DCE Modem DB9 Connector Appendix B Cable Charts UART Appendix C Block DiagramMASTER UART UART Appendix C Appendix D Declaration of Conformity DECLARATION OF CONFORMITY