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000692CG
5 - Installation
C
onnection of the RS485 line
On the inverter models which equip the UNO-DM-COM KIT board (-X
or -E version only) it is possible to use the RS485 communication port
for: Connecting the inverter to an external supported energy meter (to
manage the energy produced by the PV plant with the Dynamic Feed-in
control functionality); Integrating the inverter with a third party monitoring
and control systems; Carrying out “daisy-chain” (“in-out”) connections of
multiple inverters installation.
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 web user interface (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
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present on the UNO-DM-COM KIT board.
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
AWG Characteristic
impedance
Operating
voltage
Operating
temperature
Shielded
22 - 24
120 Ohm
≥300 V
-20...+60 °C
-T/R
+T/R
RTN
-T/R
+T/R
RTN
SHIELD
SHIELD
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
2
3
