Circutor CDP-0, Приложения к руководству пользователя, Страница: 7 / 18

7
Application notes
CDP
2�- KOSTAL PIKO INVERTER
The CDP and the inverter communicate via an RS-485 bus. This RS-485 bus can connect up
to 32 inverters, although the number of inverters in the vast majority of domestic installations
ranges from 1 to 3.
2.1.- COMMUNICATION CABLE
To communicate with a KOSTAL PIKO inverter using a CDP , the inverter must be equipped
with a communications card with an RS-485 interface (
Figure 1
).
Figure 1:Communication card.
Table 3:Communication card.
No Description
1
Connection terminal S0/AL-Out (2-pole)
2 2 Ethernet connections (RJ45)
3 Analog interface connection terminal
4 Connection terminal for RS-485 interface
5 Extension module connection terminal
The connector is a terminal for a 0.25mm
2
cable
Functions of the communication cable terminals between the
CDP
and the inverter:
Table 4:
Functions of the communication cable terminals .
CDP
R2 channel communications
connector
Communication card
RS-485 Terminal (No. 4)
Terminal Description Terminal Description
1 A+ A+ RS-485 A +
3 B- B- RS-485 B -
5 GND GND GND
It is not necessary to wire the GND terminal, although it is advisable to do so for long distances.