SMA Sunny Boy Control - Manual (Page 26)

Sunny Boy Control
SMA Technologie AG
User Manual SUNBC-14:NE0206 22
RS485 Connection Between Sunny Boys and Sunny Boy Control
Sunny Boy
Control
PAC 1273 W Betrieb
Oper ation Erdschluss Earth Fault Störun g Failure Photovoltaik -Strin gwec hselrichter Photovo ltaic string inverter SWR 1100E Betrieb
Operatio n Erdsch luss Earth Fault Störung
Failur e
Photovoltaik -Stri ngw echselrichter Photovolt aic stri ng invert er SWR 1100E Betrieb Operati on Erdschluss
Earth Fault Störung
Failur e
Photovoltaik -Stringwechselrich ter Phot ovolt aic stri ng invert er SWR 1100E
RS485
Fig. 3.4: Sunny Boys connected via RS485
Pin Assignment
The signals shown in the table below are available only when the optional RS485
Piggy-Back has been installed. The standard Sunny Boy Control does not support the
“SUNNY BOY (COM1)” interface. Instead, it uses Powerline communication to
communicate with the Sunny Boy inverters.
Fig. 3.5: “SUNNY BOY (COM1)” connector
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 3.1: Pin assignment of “SUNNY BOY (COM1)” interface
on RS485 Piggy-Back