Connection Of Several Inverters - Circutor CDP Application Notes

CDP

2.1.2. CONNECTION OF SEVERAL INVERTERS

shows the connection between the CDP and several inverters.
Figure 5
Figure 5: Connection between a CDP and several Fronius inverters.
The master / slave selector must be in the Master position (Figure 4).
If there are several inverters, the communication cable connecting them must go
from the "OUT" terminal of the first inverter to the "IN" terminal of the next inverter.
The same holds for the remaining inverters until the last one is reached, which
must always have the bus end terminal on the "OUT" connector.
The communication cable between the inverters is a pin-to-pin cable with RJ45
connectors on both ends. This type of cable can be purchased at any computer
supply store as it is a common connector used for PCs and other devices with an
Ethernet port.
The bus end terminal must always be connected to the last inverter of the bus.
This terminal is an RJ45 connector that must always be connected to the 'OUT'
terminal of the inverter.
Application notes
Table 3: Bus end terminal
Connector PIN Description
RJ45 of the signal
1 Power supply
2 GND
3 and 4 RxD+ / TxD+
5 and 6 TxD- / RxD-
7 GND
8 Power supply
Description of the
connection
Cross cables 3 and 4
Cross cables 5 and 6
9