Titan/cPCI User’s Manual, Connect Tech Inc.

Titan/cPCI Rear I/O Opto

RS-422/485 Line Bias/Termination

 

 

 

TxD +

 

TxD

150 Ω

JA4, JB4, JC4, JD4

 

 

 

 

 

TxD -

 

DTR

 

10K Ω

 

JA3, JB3, JC3, JD3

 

 

 

+5 V

 

 

 

1.8K Ω

PCI 954

 

 

RxD +

RxD

JA8, JB8, JC8, JD8

UART

 

150 Ω

 

 

 

 

JA7, JB7, JC7, JD7

 

 

 

RxD -

 

 

 

1.8K Ω

 

 

 

RTS +

 

RTS

150 Ω

JA3, JB3, JC3, JD3

 

 

 

 

 

RTS -

 

 

 

1.8K Ω

 

 

 

CTS +

 

CTS

JA6, JB6, JC6, JD6

 

 

150 Ω

 

 

 

 

 

JA5, JB5, JC5, JD5

 

 

 

CTS -

 

 

 

1.8K Ω

 

 

 

+5 V

Figure 8: RS-422/485 partial schematic for Rear I/O Opto

Note

Line bias/termination is jumper selectable

Revision 1.01

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