CEL-MAR ADA-4044H Руководство пользователя - Страница 10

Просмотреть онлайн или скачать pdf Руководство пользователя для Переключатель CEL-MAR ADA-4044H. CEL-MAR ADA-4044H 16 страниц. Rs-485 / rs-422

ADA-4044H

3.2.3. STAR TYPE CONNECTION FOR DEVICES WITH RS422 INTERFACE – CONFIGURATION

OF 2-PORT RS485-OUT

Using the ADA-4044H, configured for operating with 2-port, 4-wire RS485 (the microswitch RS-485 PORT in position 4W), it's possible

to:

- connect 2 devices with 4-wire RS422 interface to 2-wire and 4-wire RS485 bus,

- separate other segments of RS422 bus from main network – what increases the operational reliability,

- convert RS485 to RS422 interface and inversely.

During the connecting, pay attention to the proper implementation of the connection according to the following drawings

MASTER

Fig 7. Star type connection of devices with RS422 interface to 2-wire RS485 bus. Conversion of 2-wire RS485 network to 4-

wire RS422 network, device separation from main 2-wire network, extending the main bus by a further segments of 1200m,

RS422

connector

Rx+

Rx-

Tx+

signal amplification.

Tx-

GND

SLAVE