Additional Connections; Battery Temperature Sensor - SMA Sunny Island 5048 Installation Instructions Manual

SMA
Technologie AG Electrical Connection

6.4 Additional Connections

For installing the connections described below, feed the cables through the specified
holes in the rubber terminal block. Plugs for sealing the RJ45 communication cable for
internal and external communication are provided in the rubber terminal block upon
delivery. Combining plugs allows you to establish 0 to 4 feed-throughs (2 plugs without
a feed-through, 1 with 1 feed-through and 2 with 2 feed-throughs). Remove any of these
to connect the communication cable.

6.4.1 Battery temperature sensor

The battery temperature sensor measures the temperature of the connected battery. This
is necessary since the optimum charging voltage for a battery strongly depends on the
temperature. Further information is provided in section 13.4 "Charge Control" (Page
88).
A battery temperature sensor must be connected for operating the Sunny Island
5048 (included in the delivery).
In case of a fault (short circuit, cable break), the Sunny Island 5048 operates in
a safe setting, which over time leads to insufficient battery charging. A warning
indicating that the defective battery temperature sensor should be replaced
immediately is shown on the display.
Only use the battery temperature sensor provided with the delivery.
Never drill any holes in any part of the battery to mount the sensor.
A battery temperature sensor is provided with each Sunny Island 5048.
Only one battery temperature sensor, which is connected to the corresponding
master, is required for a cluster.
Technical Description SI5048-11:EE4206 Page 41