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6 Electrical Connection SMA Solar Technology AG <br />Installation ManualSBxx-1SP-US-41-IA-xx-12 40 <br />Reporting the switching status of the grid relay <br />The multifunction relay can trip a signal to the grid operator as soon as the inverter connects to the <br />utility grid. To enable this function, the multifunction relays of all inverters must be connected in <br />parallel. <br />1 kΩ <br />B F <br />1 2 3 <br />B F <br />1 2 3 <br />B F <br />1 2 3 <br />= <br />Signal to <br />grid operator <br />Inverter 1: <br />Grid relay closed <br />Inverter 2: <br />Grid relay open <br />Inverter n: <br />Grid relay open <br />max. 30 VDC <br />Figure 11 : Wiring diagram for signaling the switching status of the grid relay (example) <br />6.4.4 Connection to the Multifunction Relay <br />Additionally required material (not included in the scope of delivery): <br />☐ Conduits: 21 mm (0.75 in) or smaller with a proper reducing bush <br />☐ Rain-tight conduit fittings for wet locations complying with UL 514B: 21 mm (0.75 in) or <br />smaller with a proper reducing bush <br />EN <br />G <br />L <br />I <br />S <br />H <br />534 S Sycamore St <br />- 10110979707/01/22