Black Box SW927C, SW928C, SW929C, SW925AE manual Connecting to DEC LN03 Laser Printer, RS-422 Cables

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MODULAR SMART SWITCH

A.7 Connecting to DEC™ LN03 Laser Printer

The LN03 outputs its “printer ready” signal via pin 11, and so the wiring for the serial data cable is slightly different from those shown earlier. Switch bank 2, switch number 6, on the LN03 should be set to ON. This ensures that the “printer ready” signal is HIGH when ready and LOW when not ready, and not vice versa.

MODULAR SMART SWITCH

A.8 RS-422 Cables

The pins and connector types used for RS-422 communication vary widely between devices. Standard cables therefore do not exist. Connect the cable as shown in Figure A-8. For systems using XON/XOFF handshaking, only RXD +, RXD -, TXD +, and TXD - need to be connected.

Modular Smart Switch end	DEC LN03 end
25-Pin socket connector	25-Pin plug connector
2	3
3	2
5	11
7	7
20	6

Modular Smart Switch end		Communicating
25-Pin socket connector		device
HSOUT-	9	-ve
HSOUT+	10	+ve
RXD-	11	-ve
RXD+	12	+ve
HSIN-	15	-ve
HSIN+	16	+ve
TXD-	13	-ve
TXD+	25	+ve

Flow control in

Transmitted data out

Flow control out

Received data in

Figure A-7. DEC LN03 Serial Cable Pinning.

Figure A-8. RS-422 Cable Pinouts.

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Contents Modular Smart Switch Modular Smart Switch Modular Smart Switch Contents Chapter Modular Smart Switch Specifications FeaturesIntroduction Product InformationInstalling Memory and Port Modules Fitting Expansion-Buffer MemoryFitting Port Modules Fitting Port ModulesConfiguring the Modular Smart Switch Setting the Global Timeout PeriodTimeout Period OFFSetting Serial-Port Protocols and Options ProtocolsHardware Handshake Software HandshakeInstalling the Modular Smart Switch Positioning the Modular Smart SwitchConnecting Devices to the Modular Smart Switch Selecting Ports for Your EquipmentSwitching On Mode LPT1=COM1Enabling Computers Computers Connected to Parallel PortsBuffer Status Indicators Using the Modular Smart SwitchPort Indicators 1 to Using the Control Software Installing the Resident SoftwareCommand-Line Options Running the Control Software from the DOS PromptRight Shift Using the Control SoftwareRunning the Control Software from within Microsoft Windows Main Menu Selecting a Destination Printer, Plotter, or ModemDirect Output of Typed Keyboard Characters File Transfer Direct Output Functions Options DestinationUsing the Functions Menu Setting the OptionsSerial Port Control Utility Admode COMn baud, parity, databits, stopbitsExample High-Baud-Rate LimitationsUsing the Control Software with Windows Version EitherUsing the Modular Smart Switch to Transfer Files Transferring Files Between IBM Compatible PCsUsing the Control Software with File-Transfer Software Transferring Data Between PCs Not Compatible with IBMGeneral Hints and Tips HotkeySoftware Commands Connect CommandIntroduction PM ConnectClear Command End-of-File CommandPM Connect 1 Timeoutoff PM ClearSending Default Start-of-Day Destination Ports Troubleshooting Appendix a Serial Ports Merged PrintoutsPrint Data Transmitted but File Transfer Fails RS-232 and RS-422 Pin AssignmentsConnecting to Computers-RS-232 Connections CTSConnecting to Printers Connecting to ModemsConnecting to Plotters Connecting to NEC SpinwriterConnecting to DEC LN03 Laser Printer RS-422 CablesAppendix B Parallel Ports Parallel Pin AssignmentsCable to 36-Pin Amphenol Connector Cable for IBM PC, PC/XT, AT, or Compatible