SMA Sensorbox - Manual (Page 62)

Maintenance and Care SMA Solar Technology AG
62 Sensorbox-IEN100914 Installation Guide
9 Maintenance and Care
9.1 Maintenance
Inspect the Sunny SensorBox and the RS485 Power Injector or SMA Power Injector with Bluetooth
for signs of external damage or dirt on a regular basis.
If the integrated PV cell of the Sunny SensorBox or the sensors are dirty (e.g., from leaves or bird
droppings), the data they provide will be incorrect. Clean the Sunny SensorBox and sensors at regular
intervals. Information on how to clean the Sunny SensorBox is provided in section 9.5 ”Care”
(page 64).
If a component becomes defective or no longer complies with safety standards, then replace the
device, the sensors or the cable.
9.2 Terminating the RS485 Bus on the Sunny SensorBox
Termination is carried out by means of a termination resistor. The termination resistor is already
installed upon delivery.
1. Connect the termination resistor on the
"RS485 F2: OUT" terminal to the "D+" and "D–"
terminals.
☑ The Sunny SensorBox is terminated.
Termination of the RS485 communication bus
Refer to the RS485 cabling plan poster for the termination of an RS485 communication
bus.