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000328BG
5 - Installation
S
erial Connection Communication (RS485 PC)
On the inverter there is a RS485 communication line, dedicated to con-
necting the inverter to monitoring devices or to carrying out "daisy-chain"
("in-out") connections of multiple inverters. The line may also be used to
store settings with the dedicated advanced configuration software.
Cables connecting the RS485 line (PC) may use two different types of
connection:
• Connection of the conductors using the
terminal connectors
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(PC +T/R, PC -T/R, SH and RTN)
The SH connection must be used for connecting the
shielding boot(s) of the cable(s).
• Connection of conductors with RJ45 connectors
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The two RJ45 connectors (A) and (B) available for the RS485 (PC) com-
munication, are equivalent to each other and can be used interchange-
ably for the arrival or for the output of the line in realising the daisy chain
connection of the inverters.
The same is true for connections made using the terminal connectors
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.
Table: crimping diagram for RJ45 connectors
Pin No.
Function
1 8
3
+T/R
5
-T/R
7
RTN
1, 2, 4, 6, 8
not used
Use a connector with metal body to provide cable shield continuity!
For long distance connections, the connection on terminal connector is
preferable using a shielded twisted pair cable with characteristic impe-
dance of Z0=120 Ohm like the one shown on the following table:
Signal
Symbol
-T/R
+T/R
SH
RTN
-T/R
+T/R
SH
RTN
Positive data
+T/R
Negative datum
-T/R
Reference
RTN
Shield
SH
Shield continuity must be provided along the communication line using the SH terminal and
must be grounded at a single point.
1
IN
OUT
IN
OUT
(A)
(B)
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