7 Electrical Connection
SMA Solar Technology AG
Operating Manual STPx0-3SE-40-BE-en-10 53
7.5.5 Connecting the Multifunction Relay
7.5.5.1 Procedure for connecting the multifunction relay
Procedure See
1. Select for which operating mode you would like to use the
multifunction relay.
Section9.13, page79
2. Connect to the multifunction relay according to the operat-
ing mode.
Section7.5.5.2, page53
3. After commissioning the inverter, change the operating
mode of the multifunction relay, if necessary.
Section9.14, page80
7.5.5.2 Connection to the Multifunction Relay
Additionally required material (not included in the scope of delivery):
• Connection cable
• Bootlace ferrules (only for multi-core stranded wire, usable length of the ferrule at least
12mm)
Requirements for connection cable:
• Conductor cross-section: 0.2mm² to 1.5mm²
• External diameter: 5.3mm to 7mm
• UV-resistant for outdoor use.
Procedure:
1. Remove 1 sealing plug from the cable support sleeve.
2. Lead the connection cable into the threaded sleeve.
3. Dismantle the connection cable 40mm to 50mm.
4. Strip the insulation on the insulated conductors each by 12mm.
5. When using a multi-core stranded wire, provide the conductors with bootlace ferrules.
6. Connect the connection cable to the digital output of the inverter according to the assignment
of the terminal block of the COM connector (see Section7.5.1, page47).