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Xtreme/104 Opto User Manual

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

800-426-8979 | 519-836-1291

Full Duplex Mode

If you wish to run the individual RS-422/485 ports in full duplex mode, do not install

jumpers across positions A and C of jumper blocks JB4, JB5, JB6 and JB7. In this mode,

transmit and receive are active all the time. This mode is typically used in point-to-point

situations much like RS-232.

See Figure 1 and Figure 2 for the locations of jumper blocks on your model.

Figure 9: Full Duplex Mode Jumper Setting Example

Example

The example below shows the settings on JB4, JB5, JB6, and J1, J2 where RS-

422/485 ports 1, 2 and 3 are set for full duplex mode. Port 4 is RS-232 and

therefore is not set for full duplex.

JB4

JB5

JB6

JB7

Jumper is

off J1

Jumper is

off J2

Note: Rev A & B Xtreme/104 Opto adapters do not have

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

Jumper Legend

(Rev. C & later adapters)

A = TxD control

B = RS-232/RS-422/485

select

C = RxD control

D = RTS terminator

E = TxD terminator

F = RxD terminator & bias

G = RxD terminator & bias

H = CTS terminator & bias

I = CTS terminator & bias

Jumper Legend

(Rev. A & B adapters)

A = TxD control

B = RS-232/RS-422/485

select

C = RxD control

D = RTS terminator

E = TxD terminator

F = CTS terminator

G = RxD terminator

NOTE:

J1 controls ports 1 and 2 and J2 controls ports 3 and 4. If both ports 1 and

2 are set for full duplex then J1 should not be jumpered. If both ports 3 and

4 are set for full duplex then J2 should not be jumpered.

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