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18
21
17
OUT
IN
OUT
IN
Shield continuity must be provided along the communication line and must be grounded at a
single point using terminal 19 or 20 ( ).
Use a connector with metal body to provide cable shield continuity!
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Cables connecting the RS485 PC line may use two different types of
connection:
• Connection of the conductors using the terminals of the
communication and control signal terminal block
and RTN)
Connect the signals respecting the following positions:
Terminal
Terminal
Description
name
number
13
-T/R of the RS485 PC communication line
RS485
15
+T/R of the RS485 PC communication line
PC
Reference
17
communication line
For long distance connections, it is preferable to use a shielded twisted
pair cable with characteristic impedance of Z0=120 Ohm like the one
shown in the following table:
SH
+T/R
-T/R
RTN
SH
+T/R
-T/R
RTN
• Connection of conductors with RJ45 connectors
The two RJ45 connectors (A) and (B) available for RS485 PC communication,
are equivalent to each other and can be used interchangeably for the
arrival or for the output of the line when creating the daisy chain connection
of the inverters.
Table: crimping diagram for RJ45 connectors
Pin N°
3
5
7
1, 2, 4, 6, 8
- 96 -
5 - Installation
21
(RTN)
of
the
RS485
Signal
Positive data
Negative data
Reference
Shield
17
Function
+T/R
-T/R
RTN
not used
(+T/R, -T/R,
PC
Symbol
+T/R
-T/R
RTN
SH ( )
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