SMA SB 3800-U - Manual (Page 42)

5-14 SMA America SB3800U-12:SE2006
Table 5-2 RS-232 Pin Assignments
Figure 5-7 Connecting a SB3800U to a PC with an RS-232 Cable
Communication Terminal
Block (SB3800U)
Signal Name
9-Pin Serial-Port
Connector (PC)
25-pin Serial-Port
Connector (PC)
Case Shield Case Case
2 RxD
(Output from
Sunny Boy)
2 3
3 TxD
(Input to Sunny
Boy)
3 2
5 GND 5 7
3
5
2
3
5
2 Stˆrun g Failur e
Betrie b Operat ion Erdsc hluss Earth Fault
+ + - - L1 L2 N
2 3 5 7
C
B
A
PC running
Sunny Data
RS-232 Piggy-Back
communication module
No jumper installed for
RS-232 communication
Terminal block for
RS-232 communication
Ground terminal (PE)
for communication