B&B Electronics Buffered Smart Switch Pins 6, 8, & 20 looped back internally on the 232BSS4

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Chart B.3. DCE (Modem) DB25 Connector to Master Port

DCE (Modem)		Signal	232BSS4
Serial Port		Signal	Master Port (DCE)
DB25 Connector	Direction		DB25 Connector
2	<-----------		3
			(RD)
3	-----------	>	2
			(TD)
4	<-----------		5
			(CTS)
5	-----------	>	4
			(RTS)
6	-----------	>	20
			(DTR) *
7	<	--------->	7
			(GND)
20	<-----------		6
			(DSR) *

•- Pins 6, 8, & 20 looped back internally on the 232BSS4

Chart B.4. DCE (Modem) DB9 Connector to Master Port

	DCE (Modem)	Signal			232BSS4
	Serial Port	Signal			Master Port (DCE)
	DB9 Connector	Direction			DB25 Connector
	2	-----------	>		2
					(TD)
	3	<-----------			3
					(RD)
	4	<-----------			6
					(DSR) *
	5	<---------	>		7
					(GND)
	6	-----------	>		20
					(DTR) *
	7	<-----------			5
					(CTS)
	8	-----------	>		4
					(RTS)
Documentation Number 232BSS42907 Manual				Appendix B: Cable Charts		B-3

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

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Contents of domestic and imported parts by Buffered Smart SwitchModel 232BSS4 This product designed and manufactured in Ottawa, Illinois USAPage APPENDIX C BLOCK DIAGRAM Table of ContentsCHAPTER 4 SETUP SOFTWARE APPENDIX B CABLE CHARTSDocumentation Number 232BSS4-2907m Documentation Number 232BSS4-2907m Chapter 1 - IntroductionDefault Parameters Specifications3. 2 3.5 floppy disks Checklist1. RS-232 Buffered Smart Switch model 232BSS4 2. Instruction Manual The following equipment should be in the shipping cartonDocumentation Number 232BSS4-2907m Symbols and Conventions LED IndicatorsChapter 2 OPERATION Port Configurations Smart Switch Only Mode DescriptionOptions Command Explanation Command SummaryThree Character Command Format Four Character Command FormatCommands 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 Figure 2.1. Multiple Terminals to a Host Controller Using the 232BSS4 as a Buffered Splitter/CombinerFigure 2.2. Back to Back Operation Back to Back Operation mux/demuxFigure 2.3. Expanding the Number of Slave Ports Cascading Multiple SwitchesSlave Devices that Automatically Send their Data Slave Devices that Require Polling 25 Pin DCE Chapter 3 PORT CONNECTIONSDTE/DCE Explanation 25 Pin DTESlave Port Connections Master Port ConnectionsChapter 4 SETUP SOFTWARE IntroductionConnection Double Click ADD/REMOVE PROGRAMS Software InstallationSoftware Uninstall Select SETTINGS, CONTROL PANEL from the Windows START menuSingle Unit Main Screen Setup Tutorial26Documentation Number 232BSS42907 Manual Back to Back Main Screen 28Documentation Number 232BSS42907 Manual Default Parameters Copying Parameters Between SwitchesDocumentation Number 232BSS42907 Manual Appendix A ASCII Character Codes DECIMAL to HEX to ASCII CONVERSION TABLEASCII Appendix A Chart B.2. DTE PC DB9 Connector to Master Port Appendix B Cable ChartsPins 6, 8, & 20 looped back internally on the 232BSS4 Chart B.1. DTE PC DB25 Connector to Master PortAppendix B Cable Charts Pins 6, 8, & 20 looped back internally on the 232BSS4 Chart B.3. DCE Modem DB25 Connector to Master PortChart B.4. DCE Modem DB9 Connector to Master Port Chart B.7. Ports A - D DTE to DCE Modem DB25 Connector Pins 1, 4, & 6 looped back internally on the 232BSS4Chart B.5. Ports A - D DTE to DTE PC DB25 Connector Chart B.6. Ports A - D DTE to DTE PC DB9 ConnectorChart B.8. Ports A - D DTE to DCE Modem DB9 Connector Pins 1, 4, & 6 looped back internally on the 232BSS4Documentation Number 232BSS42907 Manual UART UART Appendix C Block DiagramMASTER UARTDocumentation Number 232BSS42907 Manual DECLARATION OF CONFORMITY Appendix D Declaration of Conformity