SMA Sunny Boy Control - Manual (Page 31)

Sunny Boy Control
SMA Technologie AG
User Manual SUNBC-14:NE0206 27
3.2 Connection to a PC
Fig. 3.9: “PC (COM2)” connector
The Sunny Boy Control is equipped with a “PC (COM2)” connector of the DB9 type.
This allows for an RS232 or RS485 connection to a PC.
"PC (COM2)" Pin Assignment
Pin RS485 signal
1 PE
2 Data +
3 Data +
4 - 680 Ω
120 Ω termination 5 GND
6 +5V
7 Termination -> Data +
680 Ω
8 Data -
Pull-up /
pull-down
resistors
9 Data -
Table 3.2: “PC (COM2)” pin assignment for RS485 connection