Power One AURORA PVI-3.8-I-OUTD Manuel D'utilisation Et D'installation page 86

Installation and operating manual
(PVI-3.8/4.6-I-OUTD Rev.: 1.5)
In order to ensure optimum communication on the RS485 line, Power-One
recommends connecting the PVI-USB-RS485_232 adaptor between the first unit of
the daisy chain and the computer. See Fig. 25 for details. (RS485-USB Converter)
For this purpose, other equivalent devices found on the market may also be used, however,
since they have never been specifically tested, Power-One does not guarantee the correct
operation of the connection.
Please note that these devices may also require an external termination impedance, which is
not necessary for the AURORA PVI-USB-485_232.
The following diagram shows how to connect units in a daisy chain configuration.
Last Aurora
S2
RTN +T/R -T/R
switch
ON
NOTE: when using an RS-485 connection, there may be up to 62 inverters
connected on the same chain. Choose any address between 2 and 63
NOTE: when using an RS-485 connection, if one or more inverters are
subsequently added to the system, remember to switch back to the OFF
position the system inverter switch that before was the last one in the system.
nd
2 Aurora
S2
RTN +T/R -T/R switch
OFF
RS-485 cable
max. length = 1.000mt
Off
max. inverter nodes = 31
Recommended RS-485 cable type:
On
LiYCY, 2x2x0,5mm (n.2 twisted
pairs) + shield
RS-485 cable (1pair + 1 conductor) +
shield
Fig. 25 - Daisy chain connection
st
1 Aurora
(Sub-D 9 pin female)
RS485 to USB Converter
S2
RTN +T/R -T/R
switch
OFF
Page 85 of 95
PC with RS232 port
(Sub-D 9 pin male)
PVI-USB-RS232_485
RTN +T/R -T/R
(terminal block)
(terminal block)
RTN +T/R -T/R
Data-Logger
RS485 port
Block Diagram: RS-485 cabling
AURORA PVI-3.8/4.6-I-OUTD