Connection To The Multifunction Relay - SMA SUNNY BOY 3.0-US Installation Manual

6 Electrical Connection
Reporting the switching status of the grid relay
The multifunction relay can trip a signal to the grid operator as soon as the inverter connects to the
utility grid. To enable this function, the multifunction relays of all inverters must be connected in
parallel.
Inverter 1:
Grid relay closed
Inverter 2:
Grid relay open
Inverter n:
Grid relay open
Figure 11 : Wiring diagram for signaling the switching status of the grid relay (example)
6.4.4

Connection to the Multifunction Relay

Additionally required material (not included in the scope of delivery):
☐ Conduits: 21 mm (0.75 in) or smaller with a proper reducing bush
☐ Rain-tight conduit fittings for wet locations complying with UL 514B: 21 mm (0.75 in) or
smaller with a proper reducing bush
40 SBxx-1SP-US-40-IA-xx-15
B F
1 2 3
B F
2
1 3
B F
2
1 3
SMA Solar Technology AG
max. 30 V
DC
Signal to
1 kΩ
grid operator
=
Installation Manual