Example 3; Sck-C-Modbus In The Inverter Station, Current Measuring Module In The String Combiner Box, Sck-M-U-1500V At Higher Level - Phoenix Contact SCK-C-MODBUS User Manual

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9.3

Example 3

SCK-C-MODBUS installed centrally in the inverter station. Solarcheck current mea-
suring module(s) installed in the string combiner box in the PV field. Higher-level
voltage measurement for each system segment.
As already indicated under Example 2, the typical parallel connection of strings in large PV
systems means that the voltage in a system segment is usually the same.
This means that voltage data can be acquired very effectively and economically. Voltage
measurement via the SCK-M-U-1500V voltage measuring module can also be used outside
of the Solarcheck device topology.
In this case, the device is used as a simple analog device in the string combiner boxes. In
this scenario, the power supply and data connection for the device must be implemented
separately. This method of use is very inexpensive, as only one voltage measuring module
is required per system segment.
PV field
Figure 9-3 SCK-C-MODBUS in the inverter station, current measuring module in the
string combiner box, SCK-M-U-1500V at higher level
String combiner box
Measuring device
for string current
Installation examples
Inverter station
Compact controller
ILC 150 ETH
Order-No.: 2985330
HW/FW: 00/100
MAC Addr.: 00.A0.48.04.09.C0
AUTOMATIONWORX
MRESET
STOP
RUN/PROG
RESET
PRG
LINK
Communication device
(to connect up to
8 measuring devices)
Measuring
device for voltage
Power Suppley
PHOENIX CONTACT
1.1 2.1 1.1 2.1 1.1 2.1 1.1 2.1
1.2 2.2 1.2 2.2 1.2 2.2 1.2 2.2
1.3 2.3 1.3 2.3 1.3 2.3 1.3 2.3
1.4 2.4 1.4 2.4 1.4 2.4 1.4 2.4
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