Connecting The External Setpoint Specification - SMA SUNNY CENTRAL 500CP XT Installation Manual

12 Cable Connection of External Devices and Connections in the Interface Cabinet
4. Press the shield clamping saddle down onto the shield of the
stripped cable until it clicks into place and fasten hand-tight.
5. Attach the cable to the cable support rail using a cable tie. This will ensure that the cable cannot be pulled out
inadvertently.

12.3.4 Connecting the External Setpoint Specification

Signal transmission
External setpoints for reactive and active power are normally specified by the grid operator, e.g. via a ripple control
signal. The Power Reducer Box or the Power Plant Controller receives the setpoints from the ripple control receiver
and sends these to the Sunny Central. The Sunny Central applies the specifications of the grid operator and feeds,
for example, a specified amount of reactive power into the utility grid. Ask your grid operator which type of signal
transmission is used.
If these setpoints are not transmitted via the SC-COM and Power Reducer Box, there are terminals located in the
Sunny Central for connecting the external setpoints. The Sunny Central processes analog standard signals of
4 mA to 20 mA.
You will find further information on how the external setpoint specification works in the Sunny Central operating manual.
Cable requirement:
☐ The cable must be shielded.
Requirement:
☐ The Sunny Central must be disconnected (see Section 14, page 65).
Procedure:
1. Insert the external setpoint cable into the interface cabinet (see Section 12.2, page 55).
2. Connect the cable in accordance with the circuit diagram (see Section 12.3.1, page 55).
3. Remove the shield clamping saddle from the busbar.
58 SCCPXT-IA-D7-en-42
SMA Solar Technology AG
Installation Manual