MODEL232BSS4 B&B Electronics, MODEL232BSS4 Datasheet

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Buffered Smart Switch Documentation Number 232BSS41202 International Headquarters B&B Electronics Mfg. Co. Inc. 707 Dayton Road -- P.O. Box 1040 -- Ottawa, IL 61350 USA Phone (815) 433-5100 -- General Fax (815) 433-5105 Home Page: www.bb-elec.com Sales e-mail: orders@bb-elec.com Technical ...

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Table of Contents Chapter 1: INTRODUCTION Specifications....................................................................................2 Default Parameters...........................................................................2 Checklist ...........................................................................................3 Chapter 2: OPERATION Symbols and Conventions ................................................................4 LED Indicators ..................................................................................4 Port Configurations ...........................................................................5 Smart Switch Only Mode ..................................................................6 Auto Select/Smart Switch Mode .....................................................13 Using the 232BSS4 as a Buffered ...

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Chapter 1: INTRODUCTION The 232BSS4 provides communications to four devices from one serial port. Each port uses a dedicated UART and includes an 8K byte transmit buffer and an 8K byte receive buffer (16K bytes total). Each port can be ...

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Specifications Model: Interface: Data Format: Data Rate: Flow Control: Power Requirements: Power Connector: Recommended Supply: B&B Model 232PS (Sold separately) Operating Temperature: 0º to 70º C Data Connectors: Dimensions: Setup Software: Supplied Accessories: CDROM with Setup Program Default Parameters When ...

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Checklist Examine the shipping carton and contents for physical damage. If damage is found, file a claim with the shipper immediately. The following equipment should be in the shipping carton: 1. RS-232 Buffered Smart Switch model 232BSS4 2. Instruction Manual ...

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Chapter 2: OPERATION Symbols and Conventions Throughout this chapter of the manual, the following symbols and conventions will be used to clarify what type of data we are addressing. Items enclosed in {brackets} will denote one byte. A character in ...

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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 ...

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Smart Switch Only Mode Description: Smart Switch Only mode is used when the host device connected to the Master port initiates all communications with the Slave devices. To use the 232BSS4 as a Smart Switch Only, Auto Select is left ...

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Command Summary: Three Character Command Format: Char1 Char2 Command Char Control Char is only needed for Tx Only, Clear Buffer, and Ignore Commands Four Character Command Format: Char1 Char2 Char3 Control Char is only needed for Tx Only, Clear Buffer, ...

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Commands: Select Port A to transmit and receive – “A” Select Port B to transmit and receive – “B” Select Port C to transmit and receive – “C” Select Port D to transmit and receive – “D” The Select Port ...

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A summary of the control characters for each combination of ports is given in Table 2.2. For instance, to broadcast to ports B & C, send: {Char1}{Char2} {Char3} ”S”{Decimal ...

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Table 2.2: Send Only and Clear Buffer Control Characters Ports to Transmit or Clear Receive Buffer None A Only B Only A & Only A & & & Only A & ...

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For instance, to ignore switching commands for 30 Seconds, send: {Char1}{Char2} {Char3} ”T””7” VB Example: Ignore30s$ = CHR$(27) & CHR$(2) & “T” & “7” Table 2.3 - Timer Values Control Byte (ASCII) “0” “1” “2” “3” “4” “5” “6” “7” ...

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Once this is sent, data can be transferred to the Slave(s) without the 232BSS4 looking for command sequences. Once the timeout has been reached, the switch will continue looking for commands ...

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Auto Select/Smart Switch Mode Description Auto Select mode allows the Slave devices to initiate communications with the device connected to the Master port. When Auto Select mode is enabled through the setup software, the 232BSS4 passes data automatically from the ...

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When the specified Port Time has elapsed, the 232BSS4 checks in sequence for other Slave ports with buffered data and switches to them other Slave ports need access to the Master, the current Slave port will again be ...

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Using the 232BSS4 as a Buffered Splitter/Combiner The Auto Select and Initial Connection features of the 232BSS4 can be used to effectively create a data splitter. Data from the Master device can be shared with multiple Slave devices. Any data ...

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Back to Back Operation (mux/demux) Printer PC Printer RF Modem PC Figure 2.2. Back to Back Operation Two 232BSS4s can be connected together through their Master ports to provide a simple form of multiplexer/demultiplexer. Any Slave port on one switch ...

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Cascading Multiple Switches If you have more than four devices that are sending data, more than one 232BSS4 can be cascaded, allowing more ports to be added. The 232BSS4 buffers data from all ports at once, making it well suited ...

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Figure 2.3 shows a typical setup, with 16 devices sending information at random times to the PC. The switches at Level 2 receive the data and send the Level 1 switch. The Level 1 switch buffers the ...

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Slave Devices that Require Polling: This configuration will also work with systems where the devices have to be polled for information. With the setup of Figure 2.3, the switches can be configured so that you still only have to send ...

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Chapter 3: PORT CONNECTIONS DTE/DCE Explanation In order to determine the proper port connections to the 232BSS4 necessary to have a basic understanding of the terms DTE and DCE. RS-232 was designed, using DB-25 connectors, for connecting a ...

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Master Port Connections: The Master Port of the 232BSS4 pin female D-sub connector configured as a DCE. This provides direct connection to an IBM PC compatible or other DTE device. When connecting the Master port to a ...

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Chapter 4: SETUP SOFTWARE Introduction The 232BSS4 comes with simple setup software for configuring the switch. The software can be run on any PC compatible computer running Microsoft Windows 95, 98, NT, 2000 operating system. Once the switch ...

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Software Installation The setup software for the 232BSS4 must be installed on your hard drive before it can be run. All directions assume the CDROM drive is assigned to drive D. If your drive is assigned another drive name, replace ...

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Setup Tutorial Step 1: Start the software by double clicking the Smart Switch setup icon on the desktop. Step 2: Select the serial (COM) port that will be used to configure the 232BSS4 or Check the box to create a ...

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When the switch is set for Auto Select mode, the Port Time and Inactivity time must be set. This time is in milliseconds and must be between 0 and 65000 (65 seconds). See chapter 2 for a full description of ...

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Configure Switch Button: This button will save all changes to the connected switch. NOTE: Once changes are saved to the switch they cannot be reset automatically. Be sure to review all changes before saving using the View Module Configuration button. ...

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Load Configuration: The parameters for Unit #1 are automatically loaded when the Back-to-Back main screen is entered. Unit #2 is loaded the first time the Unit #2 tab is selected. The user should not have to reload the configuration except ...

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Copying Parameters Between Switches: The 232BSS4 setup software can save configuration data to a file for copying of parameters. Any unit’s setup can be copied by first reading the data from one switch, then saving to another. Step 1: Run ...

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Appendix A: ASCII Character Codes DECIMAL to HEX to ASCII CONVERSION TABLE DEC HEX ASCII KEY DEC HEX ASCII DEC HEX ASCII DEC HEX ASCII 0 0 NUL ctrl @ SOH ctrl STX ...

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Appendix B: Cable Charts All charts give full pin outs. Only pins 2 & 3 are required for basic operation. Handshaking pins are needed for hardware (RTS/CTS) handshaking or if DTR used to signal the Master port ...

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Chart B.3. DCE (Modem) DB25 Connector to Master Port DCE (Modem) Serial Port DB25 Connector Pins 6, 8, & 20 looped back internally on the 232BSS4 Chart B.4. DCE (Modem) DB9 Connector ...

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Chart B.6. Ports (DTE) to DTE (PC) DB9 Connector 232BSS4 Ports (DTE) DB9 Connector 1 (DCD (RD) 3 (TD) 4 (DTR (GND) 6 (DSR (RTS) 8 (CTS) - ...

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Appendix C: Block Diagram TD RD RTS CTS DSR DCD DTR GND 232BSS4 Block Diagram Documentation Number 232BSS41202 Manual TD RD RTS CTS DSR DCD DTR GND TD RD RTS CTS DSR DCD DTR GND TD RD RTS CTS DSR ...

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Appendix D: Declaration of Conformity DECLARATION OF CONFORMITY Manufacturer’s Name: Manufacturer’s Address: Model Numbers: Description: Type: Application of Council Directive: Standards: William H. Franklin III, Director of Engineering Documentation Number 232BSS41202 Manual B&B Electronics Manufacturing Company P.O. Box 1040 707 ...