Communication connector
SMA Solar Technology AG
32
SSMUS-TUS094511
Technical Description
6.2 Communication Connector Sunny Central String-Monitor
The data cable of the communication bus is attached with
a plug at the top of the Sunny Central String-Monitor. Two
sockets are present in the Sunny Central String-Monitor
for this purpose.
Sunny Central String-Monitor at the end of the communication bus
If the Sunny Central String-Monitor is at the end of the communication bus, you only require one
socket. To ensure sufficient signal quality of the RS485 communication bus, it must be terminated on
both ends. For this, connect the termination resistor plug to the second socket. Follow section
6.2.3 "Terminate the RS485 bus in the Sunny Central String-Monitor" (page 34).
Sunny Central String-Monitor within the communication bus
If the Sunny Central String-Monitor is within the communication bus, two communication cables must
be attached to the the Sunny Central String-Monitor. Two sockets are present in the Sunny Central
String-Monitor for this purpose.
Position
Description
1
NC
2
GND
3
DATA+
4
DATA–
1 2 3
4
