SMA METER BOX FOR SUNNY BACKUP - Manual (Page 26)

6 Electrical Connection SMA Solar Technology AG
26 METERBOXSBU-IA-en-40 Installation Manual
6.5 Supplying the Meter Box with Voltage
6.5.1 Supplying the Meter Box with Voltage via the Plug-in
Power Supply
1. Connect the country-specific socket-outlet adapter to the plug-in power supply; it snaps into
place when inserted correctly.
2. Connect the plug of the plug-in power supply to the jack for the plug-in power supply on the
Meter Box.
3. Connect the plug-in power supply plug to the socket-outlet.
6.5.2 Supplying the Meter Box with Voltage via 2-pole Plug
If you do not use the supplied plug-in power supply, there is the remaining option of connecting an
AC or DC voltage source to the Meter Box using a 2-pole plug.
Requirements for a DC voltage source:
☐ The output voltage is 9 V … 24 V.
☐ The output power is at least 1.5 W.
☐ The cable between DC voltage source and Meter Box is at maximum 10 m long.
Requirements for an AC voltage source:
☐ The output voltage is 8 V … 20 V.
☐ The output power is at least 1.5 W.
☐ The cable between AC voltage source and Meter Box is at maximum 10 m long.
1. Disconnect the voltage source.
2. Open the spring clamp terminals of the 2-pole plug.
3. Connect the insulated conductors of the voltage source to the terminals of the plug.
For this purpose, the polarity is arbitrary.
4. Close the spring clamp terminals.
5. Connect the 2-pole plug to the jack for the alternative voltage source.
The 2-pole plug will fit into the jack in only one position.
6. Commission the voltage source.
Damage to the Meter Box due to excessive voltages
• Use the plug-in power supply included in the delivery.