CEL-MAR ADA-4040 Manual do utilizador - Página 5

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ADA-4040

3. INSTALLATION

This chapter will show how to connect ADA-4040 to RS485/422 bus and power supply and how to use it..

To reduce disturbance from environment, it is recommended to:

– use multi-pair type shielded cables, which shield can be connected to the earthing on one end of the cable,

– use the suitable diameter cable for power supply on account of voltage drop,

– use the powering cable with a suitable section because of the voltage drops,

– use the interference eliminators for powering the converter,

– lay signal cables at a distance of not less than 25 cm away from power cables,

– not powering the converters form the power-circuit of devices generate large impulse disturbance like contactors, relays, inverters.

3.1. ASSEMBLING

The ADA-4040 case is adapted to assembly on TS-35 (DIN35) rail. To install converter should mount device on the rail upper part of

the case then press bottom part to hearing characteristic „Click" sound.

3.2. CONNECTION TO RS485/RS422 NETWORK

RS485/RS422 interface at ADA-4040 separator-repeater is available on terminal block described as: Tx+/A, Tx-/B, Rx+, Rx- GND.

ADA-4040 support operating on RS422 bus and RS485 (2-wire and 4-wire). Both buses need proper cabling.

3.2.1. EXTENSION AND SEPARATION OF RS-485 / RS-422 BUS

Using the ADA-4040 it is possible to extend the RS485/422 bus of next segment 1200m and make the galvanic separation of next

segments of the bus. It increases the reliability of the system operation based on RS485/422 bus.

Example connections of the ADA-4040 are shown below.

3.2.1.1. SEPARATION OF RS485 INTERFACE OF DEVICE FROM THE RS485 4-WIRE BUS

Device with RS485(4W)

interface

RS485(4W)

connector

Rx+

Rx-

Tx+

Tx-

GND

V-

V+

power supply

Vss+

Vss-

3.2.1.2. SEPARATION OF RS485 (2-WIRE) INTERFACE OF DEVICE FROM THE RS485

(4-WIRE) BUS

Device with RS485 (2W)

interface

RS485 (2W)

connector

GND

V-

V+

power supply

Vss+

Vss-

ADA-4040

RS1

RS2

RS485 (4W)

Tx+ / A

Tx- / B

Rx+

Rx-

GND

V -

V +

power supply

Vss+

Vss-

Fig 3. Separation of RS485(4W)/422 port of device from RS485 4-WIRE bus

ADA-4040

RS1

RS2

RS485 (2W)

RS485 (4W)

Tx+ / A

Tx- / B

Rx+

Rx-

GND

V -

V +

power supply

Vss+

Vss-

Fig 4. Separation of RS485(2W) port of device from RS485 4 WIRE bus

Devices with RS485(4W) interface