Connection Of The Rs485 Line - ABB UNO-DM-TL-PLUS-US Product Manual

C
onnection of the RS485 line
On the inverter models which equip the UNO-DM-COM KIT board it is
possible to use the RS485 communication port for: Integrating the in-
verter with a third party monitoring and control systems; Carrying out
"daisy-chain" ("in-out") connections of multiple inverters installation; Set-
ting internal inverter paramenters with the dedicated advanced configura-
tion software "Aurora Manager Lite".
The inverter RS458 communication protocol must be properly configured depending on the
device to which it communicates. The RS485 protocol can be changed through the relevant
section of internal webserver (see the specific chapter) or through the display and the key-
board (see the specific chapter).
The connection of the serial communication cable must be made to the
specific RS485 connector
For connection of the RS485 communication line is necessary a three-
wire shielded cable. The cable specifications are described in the fol-
lowing table:
Cable type
Shielded
Shield continuity must be provided along the communication line and must be grounded at a
single point. It is recommended not to exceed a length of 1000m for the communication line.
The cabling of the RS485 line must be winded up to the toroidal provided
in the package (1 winding); this toroidal shall be conveniently placed near
the cable gland which is in the bottom part of the inverter.
1
present on the UNO-DM-COM KIT board.
26
Characteristic
AWG
impedance
22 - 24 120 Ohm
SHIELD
+T/R
-T/R
RTN
SHIELD
+T/R
-T/R
RTN
2
- 67 -
5 - Installation
Operating Operating
voltage temperature
≥300 V -20...+60 °C
3