SMA SB 2800i Installation - Manual (Page 28)

Communication Installation Guide
26 SMA Regelsysteme GmbH SB2800i-11:SE0504
7.2 RS232 Communication
RS232 is a communication standard for transmission paths up to
15 m to one single Sunny Boy 2800i. The following conditions
must be fulfilled for RS232 communication.
• The Sunny Boy 2800i has to be equipped with a second cable
gland (included in delivery) between the PV input plugs and
the cable opening for AC output on its underside.
• The Sunny Boy 2800i has to be equipped with an RS232 Pig-
gy-Back. The ordering code for the RS232 is 232PB-NR
• A cable with a minimum of three wires and common shield,
such as LiYCY, 0.25 mm² cross-section and a maximum 15 m
length has to be used.
To provide for an RS232 interface the Sunny Boy 2800i has to be
equipped with the second cable gland included in delivery. The
RS232 cable enters the inverter through this gland and is
connected to the communication terminal within the Sunny Boy
2800i (see chapter 3.1 "Device Description" (p. 7)). Its other end
is usually connected to a serial interface of a PC. The following
table specifies the pin designation for standard PC terminals.
Terminal Signal
D-SUB 9
plug (PC)
D-SUB 25
plug (PC)
Enclosure Shielding Enclosure Enclosure
2
RxD (Sunny Boy
output port)
2 3
3
TxD (Sunny Boy
input port)
3 2
5 GND 5 7