SMA External Supply Voltage 230 V - Manual (Page 27)

Procedure:
1. Disconnect the inverter on the DC side (see inverter manual).
2. Disconnect the SMA String-Monitor (see SMA String-Monitor manual).
3. Disassemble the lower protective cover of the SMA String-Monitor (see SMA String-Monitor
manual).
4. Push the connectors of the power supply assembly onto the connectors of the electronic
assembly in the SMA String-Monitor.
5. Screw the spacer bolts supplied in the scope of delivery through the holes of the power supply
assembly onto the mounting pins. As a result, the power supply assembly is fused.
6. Connect the cables for the supply voltage (see Section 4.4.2, page 27).
4.4.2 Connecting the Cables for the Supply Voltage
Requirements:
☐ The SMA String-Monitor must be disconnected (see SMA String-Monitor manual).
☐ The inverter must be disconnected on the DC side (see inverter manual).
☐ The power supply assembly must be installed (see Section 4.4.1, page 26).
Cable requirements:
☐ Conductor cross-section: 1.5 mm 2 to 2.5 mm 2
☐ Recommended cable type: NYY-O
☐ If large distances and small cable cross-sections are involved, take the voltage drop into
account.
Procedure:
1. Remove the sealing plugs from the corresponding enclosure openings (see Section 4.2, page 24
).
2. Lead the cables for the supply voltages through the enclosure openings into the SMA String-
Monitor.
3. Dismantle the cables by 80 mm.
4. Strip off the insulation of each conductor by 12 mm. Make sure that no pieces of cable are
dropped into the SMA String-Monitor.
5. Connect the cable for incoming supply voltage
to terminals X22:2,3. To do this, insert the cable
into the terminal and close the locking lever of
the terminal.
4 Installation SMA Solar Technology AG
Installation Manual 27 SSMU-AUX-PB/OVP-IA-xx-10
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