Power One AURORA PVI-3.0-OUTD-S-US, Инструкция по установке и эксплуатации

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Installation and Operator’s Manual Page 85 of 108
(PVI-3.0/3.6/4.2-OUTD-x-US Rev: 2.1)
6.1.3 Daisy chain
The RS-485 terminal block or RJ12 connectors can be used to connect a single Aurora
inverter or multiple Aurora inverters connected in a daisy chain. The maximum number of
inverters that can be connected in a daisy chain is 248. The recommended maximum length
of this chain is 1200 meters.
In a case where multiple inverters are connected in a daisy chain, it is necessary to assign an
address to each unit. Refer to paragraph 5.5.7.1 for instructions on how to set addresses.
In addition, the last inverter of the chain must have line termination contact active (S2 switch
-120
Ω TERM set to ON). See Fig. 24.
Any Aurora device is supplied with default address two (2) and with the S1 DIP switch in the
OFF position.
In order to ensure optimum communication on the RS485 line, Power-One recommends
connecting the PVI-RS232485 adapter to a location between the first unit of the daisy chain
and the computer. See Fig. 25 for further details.
Other equivalent devices available on the market can also be used but Power-One does not
assure correct connection operation since their equipment has never been tested with these
equivalent devices.
Please note that these other equivalent commercial devices could require an external
termination impedance, which is not necessary for Aurora PVI-232485.
Figure 25 shows you how to connect multiple units into a daisy chain configuration
.