3 Inverter Manager SMA Solar Technology AG
8 IMVIOBOX-IA-xx-16 Installation Manual
3.3.5 Connecting the I/O Box and
Weather Station (Optional)
Pin assignment of the serial interface (RS485) at the Inverter
Manager:
Figure 5: Pin assignment of the serial interface
The I/O Box must be connected to port 2 of the Inverter
Manager. Termination for the RS485 interface is not
necessary.
Interfaces and Data of the Weather Station
Only one weather station can be connected to each Inverter
Manager. The weather station must be connected to port 1
of the Inverter Manager. A maximum of two temperature
sensors are supported.
The following data of the weather station are provided by
the Inverter Manager:
3.3.6 Connecting the
Inverter
Manager to the Voltage
Supply
Procedure:
To connect the Inverter Manager to the voltage supply,
perform the following actions in the specified order.
• Connect the grounding conductor to the
Inverter Manager.
• Connect the power supply unit.
Connecting the Grounding Conductor to the
Inverter Manager
Shielded ground: The shielded ground (also called
"protected ground") is located at the pin connector for the
electrical connection in the displayed view.
Procedure:
• Ground the Inverter Manager. For this purpose,
connect the grounding conductor to the grounding
screw of the Inverter Manager. Proper grounding and
the correct cable route help limit possible interference
emissions due to electromagnetic interferences (EMI).
7--- TRD(3)+
8--- TRD(3)-
Do not connect during operation
Do not connect the I/O Box or the weather station to
the Inverter Manager during operation. Errors might
occur that cannot be detected immediately.
• Disconnect the Inverter Manager from voltage
sources.
Pin Assignment
1 ---
2 ---
3 DataB(+)
4 DataA(-)
5GND
6 ---
7 ---
8 ---
Pin Assignment for
10/100 Mbps
Assignment for
1000 Mbps
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