SMA Sunny Boy Control - Manual (Page 29)

Sunny Boy Control
SMA Technologie AG
User Manual SUNBC-14:NE0206 25
Fig. 3.7: RS485 connection between one Sunny Boy and a Sunny Boy Control
Establishing RS485 connections with several Sunny Boy inverters
The first and the last device on the RS485 bus must be terminated. This
can be achieved by setting jumpers on the device, bridging pins 7 and 9
of the connector, or using a plug with a resistor.
One device on the RS485 bus must have pull-up/pull-down resistances.
The Sunny Boy Control normally comes with internal jumpers set for this
purpose at the factory; in that case, no further steps need to be taken.