85Installation
EN
NOTE – D Shield continuity must be provided along the communication line and must be
grounded in a single point.
RTN
SHIELD
TO MONITORING
SYSTEM
485+
485-
NOTE – D It is the installer’s responsibility to evaluate the use of an additional overvoltage
protective devices on the communication line.
NOTE – D For information on installation, compatibility and use of monitoring system, please
refer to the specific documentation on the accessory components.
•
Connect all the units of the RS485 chain in accordance with the daisy-chain model observing the
correspondence between the signals, and activate the termination resistance of the communication line
of the final element of the chain by switching the (40) switch to the ON position.
J9 J10
X2
J2
S2
J4
J1
S1 S3
J3
J6
J9 J10
X2
J2
S2
J4
J1
S1 S3
J3
J6
Monitoring
system
ON
OFF
120.0
TERM.
RS485
ON
OFF
S3
ON
OFF
S3
ON
OFF
S3
40 40 40
NOTE – D The communication line must also be terminated on the first element of the chain
which normally corresponds to the monitoring device.
NOTE – D It is recommended not to exceed a length of 1000m for the communication line.
NOTE – D The maximum number of inverters that can be connected to the same RS485 line is 62.
NOTE – D In case of longer communication line and/or in case of a large number of connected
inverters to the same line it could be necessary to add a RS485 amplifier to guarantee the
performance of the communication line.
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