SMA SC 500HE-US Installation - Manual (Page 46)

7 Connecting Optional Communication Devices SMA America, LLC
46 SC500HEUS-IA-US_en-14 Installation Manual
7.3.4 Termination
To ensure sufficient signal quality of the RS485 data bus,
it must be terminated on both ends.
The Sunny WebBox is located at one of the end points of
the RS485 data bus.
• Mount jumper to J1A.
The jumper is mounted upon delivery.
Signal biasing (jumper J1B and jumper J1C)
To ensure sufficient signal quality of the RS485 communication bus, a bias must be connected to the
WebBox.
• Connect jumper to J1B and J1C.
Both jumpers are mounted upon delivery.
A