SMA Sunny Boy 6000, Installation Manual

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Wiring the SB6000U Communication Wiring
SB6000U-13:SE2506 SMA America 5-17
RS-485 Communication
RS-485 is a communication standard for bidirectional transmission of data between one
or more Sunny Boy inverters and a PC.
Note: All Sunny Boy inverters are capable of RS-485
communication. You can mix different Sunny Boy models on the
RS-485 communication bus.
Requirements for RS-485 Communication:
• The Sunny Boy 6000U must be equipped with an RS-485 Piggy-Back communica-
tion module.
• The cable should be no longer than 1200 meters (4000 feet) with a common shield,
and a wire size no smaller than 24 AWG. Use the cable type specified in the RS-
232 Tech Note on www.sma-america.com.
• RS-485 cables are available from SMA America.
• Conduit may be required for communication wiring, per local electrical code re-
quirements.
Connecting an RS-485 Cable
Use the following procedure to install an RS-485 data-communication network:
Note: The following steps describe how to connect one or
more Sunny Boy inverters to an RS-485 bus. For more
information on connecting more than one inverter to an RS-
485 bus, please see “Technical Note: RS-485
Communication” in the Tech Updates section of our web site
at www.sma-america.com
1. Connect the three wires of the RS-485 cable to terminals 2, 5, and 7 of the
communication terminal block as shown in Figure 5-10. Record the wire color used
for each of the terminals.
2. Connect the shield of the cable to the SB6000U ’s case. Do NOT connect the cable
shield to the PC’s DB-9 connector. The shield must remain floating at the PC.
3. Install a jumper in position A, the bottom set of pins on the communication jumper
block, to set it for termination.
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