SMA SC 400HE Installation - Manual (Page 84)

External Connections SMA Solar Technology AG
84 SCxxxHE-IEN104432 Installation Guide
6.7 Analog Inputs
6.7.1 Analog Sensors
In the Sunny Central it is possible to install a temperature sensor PT 100 and two additional sensors
(pre-assembled as ExtSollrr, ExtGlolrr) on the Sunny Central Control panel via the customer’s terminal
strip. See the table below for the respective connection options available for the customer. These
sensors can be configured by the customer.
6.7.2 External Signals
In addition to the analog sensors, three further signals can be connected: ExtAlarm, ExtSolP, ExtSolQ.
These signals have a direct effect on the operation of the Sunny Central.
A voltage supply of 24 V
DC
must be provided if an ExtAlarm sensor is to be connected. The voltage
supply is made available internally within the Sunny Central, but can also be tapped externally.
The other analog inputs (ExtSolP, ExtSolQ) help to regulate the effective and reactive power of the
Sunny Central. These sensors are also connected to the customer’s terminal strip.
Cable routing of analog inputs
The analog cable inputs and the communication unit are fed in through the sliding plate in
the floor of the AC cabinet.
Connecting the sensors
The procedure for connecting the sensors to the terminal strip in the Sunny Central Control
is described in the documentation included in the delivery.
Configuring the sensors
Please refer to the Sunny Central user manual for detailed information.