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Identificazione: MD-AL-GI-00
Rev. 4.0 del 31.01.18 - Applicazione: GID
Manual of 07/06/2019 Rev. 1.1 “User Manual for 20K-33KTL”
Connecting the RS485 communication cables
When using the RS485 communication line, the inverter must be connected to the communication
equipment (for example, to a data acquisition device or PC terminal).
For communication via the RS485 line, it is recommended to use AWG 24 shielded outdoor
network cables with an internal resistance of less than or equal to 1.5 ohm/10m and external
diameter between 4.5 mm and 7.5 mm.
The RJ45 waterproof connector is made up of six parts: plug, screw nut, seals, housing, sealing plug
and cable screw nut, as shown in the figure below.
Figure 32 – Connector for communication via 485 port
When passing the communication cables, make sure that they are separated from the power
cables and away from sources of interference, so as to prevent any interruptions in the
communication.
Procedure
1)
Remove an appropriate length of the outer insulation layer of the shielded network cable using a
wire stripper.
2)
Open the front cover located on the bottom of the inverter and insert the network cable into the
cable gland, passing it through the external tightening nut, the seal and internal tightening nut.
3)
Connect the stripped network cable to the respective pins on the plug, as shown below.
Number
Colour
Function
1
White and orange
RS485 B
2
Orange
RS485 A
3
White and green
RS485 A
4
Blue
RS485 A
5
White and blue
RS485 B
6
Green
RS485 B
7
White and brown
NC
8
Brown
NC
