CEL-MAR ADA-4044H, Руководство пользователя

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2.1. ISOLATION
HUB ADA-4044H has 2-way or 3-way and 1kV= or 3kV= galvanic isolation (depend on version, described in section VERSIONS ).
Fig 2. Insulation structure
3. INSTALLATION
This chapter will show how to connect ADA-4044H to RS485/422 bus and power supply and how to use it.
To reduce disturbance from environment, it is recommended to:
–
use multipair 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
ADA-4044H converter 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 BUS
RS485/RS422 interface at ADA-4044H is available on terminal block described as: Tx+/A, Tx-/B, Rx+, Rx- (IN) and T1+/A1, T1-/B1,
R1+/A2, R1-/B2, T2+/A3, T2-/B3, R2+/A4, R2-/B4 (OUT). Both buses need proper cabling.
Connection the GND terminal of RS485/422 interfaces, connected devices to RS485/422 bus, should be done in case of potential
difference, which makes data transmission is improper .
3.2.1. STAR TYPE CONNECTION FOR 4-WIRE RS485 BUS – 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 up to 64 devices with 4-wire RS485 interface in 'star',
- extend the main bus by a further segments of 1200m,
- separate other segments of bus from main network – what increases the operational reliability,
- amplify the RS485 signal.
During the connecting, pay attention to the proper implementation of the connection according to the following drawings.
5
ADA-4044H
Power supply
10 - 30VDC
IN
RS485/RS422
OUT
RS485/RS422
3-WAY ISOLATION
Power supply
10 - 30VDC
OUT
RS485/RS422
IN
RS485/RS422
2-WAY ISOLATION