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Xtreme/104 Opto User Manual

CTIM-00007 (0.10) 3/21/2012 www.connecttech.com 24

800-426-8979 | 519-836-1291

Line Termination

Use jumper blocks JB4, JB5, JB6 and JB7 to terminate and bias TxD ±, RxD ±, RTS ±, and

CTS ± on the individual RS-

resistors. Please note that revisions A and B of the Xtreme/104 Opto adapter do not have

bias resistors (refer to KDB-284 in the Connect Tech Knowledge Database found in the

Support section of our website www.connecttech.com).

See below for a partial schematic of the RS-422/485 circuit for the Xtreme/104 Opto and

Figure 1 and Figure 2 for jumper locations for your model.

Figure 12: RS-422/485 Partial Schematic Xtreme/104 Opto

TxD

TxD +

RxD -

TxD -

RxD +

Xtreme/104 Opto

RS-422/485 Line Bias/Termination

RxD

RTS

RTS +

CTS -

RTS -

CTS +

CTS

16C2850

UART

150 

1.8K 

+5 V

150 

1.8K 

+5 V

Optical

Isolator

Optical

Isolator

Optical

Isolator

Optical

Isolator

150 

JB4E, JB5E, JB6E, JB7E

150 

JB4D, JB5D, JB6D, JB7D

JB4F, JB5F, JB6F, JB7F

JB4H, JB5H, JB6H, JB7H

JB4I, JB5I, JB6I, JB7I

JB4G, JB5G, JB6G, JB7G

Note:

1. Line bias/termination is jumper selectable.

2. Rev A & B Xtreme/104 Opto adapters do not have positions

H & I on jumper blocks JB4, JB5, JB6, and JB7

3. Rev A & B Xtreme/104 Opto adapters do not have bias

resistors (please refer to KDB-284 in the Connect Tech

Knowledge Database found in the Support section of our

website www.connecttech.com).

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