Connect Tech JB3, JB0, JB1, JB2 user manual RS-485/422 partial schematic

Page 31

Chapter 4: Appendices – RS-485/422 Interface

4-11

Line Termination

You can use jumper blocks JC, JD, JE and JF to terminate and bias TxD ±, RxD ±, RTS ±, and CTS ± on the individual RS- 485/422 ports through jumper selectable 150 Ω fixed resistors.

Please refer to Figure 4 for a partial schematic of the RS-485/422 circuit for the Titan/cPCI and to Figure 1 for the locations of JC, JD, JE and JF.

Figure 4: RS-485/422 partial schematic

Titan/cPCI

RS-485/422 Line Bias/Termination

PCI 954

UART

 

 

 

TxD +

TxD

150

JC5, JD5, JE5, JF5

 

 

 

 

TxD -

DTR

 

 

10K

JA0, JA1, JA2, JA3

 

 

 

+5 V

 

 

 

1.8K

 

 

 

RxD +

RxD

JC3, JD3, JE3, JF3

 

 

150

 

 

 

 

JC4, JD4, JE4, JF4

 

 

 

RxD -

 

 

 

1.8K

 

 

 

RTS +

RTS

150

JC6, JD6, JE6, JF6

 

 

 

RTS -

 

1.8K

 

JC1, JD1, JE1, JF1

CTS +

CTS

 

150

 

JC2, JD2, JE2, JF2

CTS -

1.8K

+5 V

Note: Line bias/termination is jumper selectable

Titan/cPCI User’s Manual, ver. 0.00

Image 31
Contents Multi-port Serial Communications Adapters Connect Tech IncThis page is intentionally blank Limited Warranty Trademark Acknowledgment Copyright NoticeTable of Contents List of Figures List of TablesAppendices Manual Overview IntroductionConventions & Symbols Product Overview FeaturesTitan/cPCI Adapters Titan/cPCI adapters Titan/cPCI Software Customer Service OverviewSystem Description Problem Description Connect Tech Product DescriptionEmail/Internet Mail/CourierTelephone/Facsimile RMA Overview Configuration Hardware InstallationBaud Rate Selection RS-485/422 Line Interface Full Duplex ModeHalf Duplex Mode Multi-drop Slave ModeInstalling the Titan/cPCI Adapter in your System This page is intentionally blank Software Installation This page is intentionally blank Appendix a Specifications Connectors/Interface DimensionsTitan/cPCI Part Numbers Titan/cPCI-2 Titan/cPCI-4 CertificationGeneral This page is intentionally blank Connector Pinouts Appendix B Connectors/PinoutsDB-37 cable connector pinouts Function Factory Setting Appendix C Factory SettingsThis page is intentionally blank Electrical Interface Selection Appendix D RS-485/422 Line InterfaceHalf Duplex RS-485 RS-485/422 partial schematic Technical Notes RS-485/422 wiring diagram 4 wire RS-485/422 Cable WiringRS-485/422 wiring diagram 2 wire Titan/cPCI User’s Manual, ver Titan/cPCI User’s Manual, ver

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