Connect Tech JB2 Manual do Utilizador descarregar pdf (Página 23)

Xtreme/104 Opto User Manual

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

800-426-8979 | 519-836-1291

Half Duplex RS-422/485 Industry Compatible Model (XTG054)

Jumper blocks JB4B, JB5B, JB6B and JB7B can be used to simplify your RS485 wiring.

Install both the A and B jumper blocks to make the TX+ to RX+ and TX- to RX-

connections.

Multi-drop 4-wire Mode

Place a jumper on position A of jumper blocks JB4, JB5, JB6, JB7 and on J1 (ports 1 and 2)

or J2 (ports 3 and 4) to run the individual RS-422/485 ports in multi-drop slave mode. In

this mode the TxD line driver is enabled only when data is transmitted and RxD is enabled

all the time. This mode is typically used in multi-drop 4 wire connections.

See Figure 1 and Figure 2 for jumper block locations.

Figure 11: Multi-drop 4-wire Mode Jumper Setting

In the following example, Ports 1 and 2 are set for RS-422/485 multi-drop slave mode.

Ports 3 and 4 are RS-232 and therefore should not be set for multi-drop slave mode.

JB4

JB5

JB6

JB7

Jumper is

on 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 you should not jumper J1. If both ports 3 and 4 are set for full duplex

then you should not jumper J2.

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