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S
erial Communication connection - Slave (RS485-1, RS485-2)
Be advise that automatic settings of network parameters at the turning on, embedded logging
capability, automatic logger free transferring of data to Aurora Vision Cloud and remote
firmware update are provided over TCP/IP (Ethernet and/or Wi-fi) bus only.
The use of the inverters over the RS485 line is recommended in case of monitoring and
controlling by using third party RS485 control systems.
The connection of the inverters over this RS485 line is recommended for replacement of
already installed old model of inverters or service purpose only.
When connecting the ABB monitoring devices, the RS485-1 line must be used
R S
4 8
R S
4 8
5 - 2
53
SH
+T/R
-T/R
RTN
SH
+T/R
-T/R
RTN
57
56
RS485-2
RS485-1
OUT
IN
Shield continuity must be provided along the communication line using the SH terminal and
OUT
must be grounded at a single point.
IN
- RS485-1 serial communication line.
The communication protocol can be set as "Aurora" (proprietary
communication protocol) or Modbus RTU (ABB protocol).
This port must be used for firmware upgrading (locally or
remotely through the ABB monitoring devices)
- RS485-2 serial communication line.
The communication protocol can be set as "Aurora" (proprietary
communication protocol), Modbus RTU (ABB protocol) or Modbus
RTU (Sunspec protocol).
Cables connecting the RS485 line may use two different types of
connection:
• Connection of the conductors using the terminal connectors
5 - 1
For long distance connections, the connection on terminal connector
is preferable using a shielded twisted pair cable with characteristic
impedance of Z0=120 Ohm like the one shown on the following table:
- 83 -
Signal
Positive data
RS485 (-1 or -2) +T/R
Negative data
RS485 (-1 or -2) -T/R
Reference
Screen
5 - Installation
53
Symbol
RTN
SH
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