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

Handleiding

SOLARCHECK string voltage measurement with SCK-M-U-1500V

105608_en_02 PHOENIX CONTACT 29

Example:

4.2.2 Step response time

Figure 4-3 Step response time

If the module is connected to the SCK-M-I-8S-20A SOLARCHECK current measuring mod-

ule, the measured values are available via the SCK-C-MODBUS SOLARCHECK commu-

nication module. In this case, the shortest possible retrieval interval depends on the refresh

cycle of the SOLARCHECK devices. The fastest possible cycle time between SCK-C-

MODBUS and SCK-M-I-8S-20A is 2 s. For additional details on the internal communication

cycle, refer to Section “SCK-internal communication cycle” on page 33.

4.3 Power supply

The voltage measuring module is usually supplied directly via the supply output of the

SCK-M-I-8S-20A SOLARCHECK current measuring module. Design the power supply for the en-

tire SOLARCHECK device chain as described in Section “Power supply for the SOLARCHECK

devices” on page 60. If the voltage measuring module is connected to the SCK-M-I-8S-20A

SOLARCHECK module, an additional power supply is not required for the device.

Alternatively, the voltage measuring device can also be used outside of the SOLARCHECK

device family. In this case, the power supply must be implemented separately and con-

nected directly to the supply input. To do this, proceed as described in Section “Installing

the SCK-M-U-1500V voltage measuring module” on page 56.

Nominal

voltage

Lower

value

Upper

value

Resolution Example oper-

ating voltage

Register

representa-

tion

1500 V

PV

0 V

PV

=

2 V

ANALOG

1500 V

PV

=

10 V

ANALOG

1 V

PV

=

0.0053 V

ANALOG

850 V

PV

=

6.53 V

ANALOG

6530 [dec]

800 V

1000 V

1200 V

1400 V

1600 V

2 V

3 V

4 V

5 V

6 V

7 V

8 V

9 V

10 V

600 V

400 V

200 V

0 V

U_

IN

U_

OUT

(Delta) t

-200 V

1 V

0 ms 50 ms 100 ms 150 ms 200 ms 250 ms 300 ms 350 ms 400 ms 450 ms 500 ms

15 ms

29 ms

56 ms

287 ms

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