Sonnen sonnenBatterie 10, Installation Instructions Manual, Page: 61 / 100

Using digital inputs/outputs (optional) | 8
KD-557 | 1000241 | EN | 02 61 / 100
8.2.4 Recording constant power of an electrical generator
The use of digital inputs/outputs described here is only permitted for electrical
generators with a constant power output . Generators with fluctuating power
output, such as modulating combined heat and power stations, must not be
connected in this way.
If digital input ( DI ) CHP is used, the controls of the storage system include the power of
the connected electrical generator (e.g. a combined heat and power station) in calcula-
tions for controlling flows of energy.
Function
When digital input CHP is activated, the storage system adds the power output of the elec-
trical generator to current production calculations. The power output of the electrical gen-
erator must be constant for this, as the digital input only detects the statuses of activated
or deactivated.
Configuring settings
The power generated by the electrical generator is specified in the commissioning assist-
ant.
„
Activate the combined heat and power station on page Features.
„
Specify the constant power of the combined heat and power station (Power).
Application example
The type of connection for digital input CHP depends on whether the CHP unit has a po-
tential-free operating contact or not.
Illustration 25: Example: CHP unit with operat-
ing contact
1 Combined heat and power station
2 Potential-free operating contacts
of the CHP unit (open if the station
is not operating, closed if it is)
Combined heat and power station with operating
contact
If the combined heat and power station (1) has a
potential-free operating contact (2), it can be con-
nected as shown in the figure. As soon as the oper-
ating contact (2) closes, digital input CHP will be
activated.