Phoenix Contact SCK-M-U-1500V Handleiding (128 Pagina's)

Handleiding

SCK-C-MODBUS SOLARCHECK communication module

105608_en_02 PHOENIX CONTACT 31

5 SCK-C-MODBUS SOLARCHECK communication module

5.1 Function

The communication module collects the data from all connected measuring modules and

transfers it to a higher-level controller via RS-485 Modbus/RTU.

At the same time, the connected measuring modules are supplied with power via the communi-

cation cable (SCK BUS) between the measuring modules and the communication module.

This distributed structure means that a power supply is not required in the string combiner

box in the field.

Figure 5-1 Block diagram of the SCK-C-MODBUS SOLARCHECK communication

module

5.2 Data acquisition and data transfer

The SOLARCHECK communication module acquires the data in parallel from all connected

SOLARCHECK measuring modules. Each measuring module is connected to a separate

data input (T1 to T8). This therefore creates a star wiring configuration. A maximum of eight

measuring modules can be connected to a communication module. A proprietary protocol

is used for data transfer between the measuring modules and the communication module.

At the same time, the communication cable is also used to supply power to the measuring

modules in the field. The data is made available to the higher-level control unit via an

RS-485 interface using Modbus/RTU.

It is imperative that the data from the measuring modules is retrieved via the communication

module. Operation without a communication module is only supported for the SCK-M-U-1500V.

A

+24 V

B

GND1

GND2

GND1

+24 V

DC

RS-485

C

INPUT

SCK-MODBUS

T1

T2

T3

T4

T5

T6

T7

T8

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