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

Handleiding

SOLARCHECK family

28

PHOENIX CONTACT 105608_en_02

4.2 Data acquisition and data transfer

The analog output of the voltage measuring module can be connected directly to the

0 V to 10 V input of the corresponding SCK-M-I-8S-20A SOLARCHECK current measuring

module. The measured values are then available via the SCK-C-MODBUS SOLARCHECK

communication module via RS-485 Modbus/RTU. As an option, the output can also be con-

nected to any analog 0 V to 10 V input of a controller, for example. Observe the installation

instructions in Section “Installing the SCK-M-U-1500V voltage measuring module” on

page 56 for integration and installation of the voltage measuring module. The voltage value

is mapped as a 2 V to 10 V signal. Due to the live zero point of the output, line break detec-

tion is integrated automatically (“live zero”).

4.2.1 Representation of voltage values at the analog output

The following calculation is used as the basis for mapping the system voltage values:

This results in the following value representation:

Figure 4-2 Value representation for voltage measurement

Y1 (left): decimal register value

Y2 (right): analog value (U_OUT)

X: system voltage

Table 4-4 System voltage calculation

Transfer function Resulting system voltage

U

2...10V OUT

=

()

2 V - 10 V

x U + 2 V

+-(HVin)

0 - 1500 V

U

+-(HVin)

=

()

2

x U - 375 V

2...10V OUT

375

6000

7000

8000

9000

10000

0 V

2 V

3 V

4 V

5 V

6 V

7 V

8 V

9 V

10 V

5000

4000

3000

2000

100 V

200 V

300 V

400 V

500 V

600 V

700 V

800 V

900 V

1000 V

1100 V

1200 V

1300 V

1400 V

1500 V

Y

1

Y

2

X

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