
Electrical Installation
6
6.6 Using digital inputs/outputs
Electrical work on the storage system
Danger to life due to electrocution!
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Switch off the storage system (see 8.2 – p. 62).
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Disconnect the relevant electrical circuits.
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Secure against anyone switching on the device again.
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Wait five minutes so the capacitors can discharge.
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Check that the device is disconnected from the power supply.
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Only licensed electricians are permitted to carry out electrical work.
Overvoltage when switching off electromagnetic relays
Damage to components!
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Only use electromagnetic relays with a protective circuit (e. g. with a free-
wheeling diode) or semiconductor relays.
The wiring configurations described in this section are examples only and serve as
a guide for electricians working on the system.
The wiring configurations are not universal. The electricians working on the system
are responsible for the correct wiring of the system.
In some cases, the permission of the distribution grid operator or power supply
company may be required.
External components (terminals, contactors, relays, etc.) needed to wire up the
digital inputs/outputs are not supplied.
6.6.1 Connecting the signal line
The signal line for using the digital inputs/outputs can be obtained from sonnen
GmbH
4
. Only this original signal line may be used.
The digital inputs and outputs (XDIO) are on the top side of the storage system.
These can be used to control external devices. The digital signals are transmitted via
the signal cable (4). We recommend connecting the signal cable to a terminal strip
(6). The individual cores of the signal cable from the terminal strip can then be
distributed to the corresponding downstream external components. The white wire
of the signal cable (4) represents the earth (GND). If more than one digital output
is used, then several wires must be connected to earth. For this reason we
recommend installing multiple terminals which are connected via a bridge (5) to
earth (GND).
4
Additional accessories ‘Digital input/output D-SUB’
KD-421 | Part no. 22136 | EN | X03
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CAUTION
DANGER
WARNING
Notice
CAUTION
DANGER
WARNING
Notice