Quatech SSP-300, SSP-200 user manual Termination Resistors, Recommended Termination Resistor Values

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6.3 Termination Resistors

No termination resistors are provided on the SSP-200/300 ports. Both output and input signals are connected only to the external connector. Any termination which is required must be added externally.

RS-422/485 Receiver

+	RXD+
	Rt
-	RXD-

RS-422/485 Receiver

+

-

AUXIN+

Rt

AUXIN-

Recommended Termination Resistor Values

RS-422	RS-485
100 ohm 1/2W resistor	60 ohms total resistance
	(120 ohms at each end)

Figure 0. RS-422/485 Termination

Hardware Information

6-5

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Contents SSP-200/300 SSP-200/300 Warranty InformationStandards to which Declaration of ConformityTable of Contents Introduction This page intentionally left blank DOS/Windows SSP-200/300 Client Driver for DOS Client Driver InstallationBaddress Command Line OptionsDevice = C\SSP-200\ SSP231CL.SYS Page Generic Client Drivers Common ProblemsAvailable Resources SSP-200/300 Enabler for DOSMultiple Configuration Attempts Older Versions of Card and Socket ServicesR option is not used Page Page Socket Numbers Card and Socket Services SoftwareMemory Range Exclusion Page Windows 95/98/Millennium ME Installing a SSP-200/300 Under Windows 95/98/MESSP-200/300 Resource Settings in Windows 95/98/ME PC Card 1Viewing Resource Settings with Device Manager2Changing Resource Settings with Device Manager Start the Windows 95/98/ME Device ManagerISR Auxout Base I/O Address Resource Modification Not Allowed Frequently Asked QuestionsBasic Configuration List Not Available This page intentionally left blank Windows Installing a SSP-200/300 Under WindowsDouble click ‘Serial Port Adapters’ Double click ‘Drivers’ Page Manager SSP-200/300 Resource Settings in WindowsLPT Viewing Resource Settings with Device Manager Changing Resource Settings with Device Manager Page Data Rate Multiplier Page Page Basic Auxiliary Range RS-422/485 Clock Scratch 0012 Loopback Any RTS Controlled Auxout Windows NT Installing SSP-200/300Page Page Page Auxiliary Channel RTS-CTS Handshaking Auxiliary Channel ConfigurationHardware Information Auxiliary Channel Handshaking Disabled Options Half Duplex OperationPage Recommended Termination Resistor Values Termination ResistorsThis page intentionally left blank SSP-200/300 Adapter Cable External ConnectionsThis page intentionally left blank Specifications SSP-200/300