SMA SUNNY TRIPOWER X 20-US - Connection to the Multifunction Relay; Pin Assignment MFR

6 Electrical Connection
SMA Solar Technology AG
Operating manual STPxx-US-50-BE-en-11 43
☐ Where required: Field-assembly RJ45 connector.
☐ 1 conduit (trade size: 27mm (1in) or smaller with suitable reducer bush)
☐ 1 rain-tight conduit fitting or conduit fitting for wet locations complying with UL514B (trade
size: 27mm (1in) or smaller with suitable reducing bush)
Procedure:
1. Disconnect the inverter from all voltage sources (see Section9, page67).
2. Remove filler plug from the enclosure opening for the network cables.
3. Insert the conduit fitting into the opening and tighten from the inside using the counter nut.
4. Attach the conduit to the conduit fitting.
5. Guide the network cable out of the conduit into the inverter.
6. When using a self-assembly network cable, assemble the RJ45 connectors and connect them
to each network cable (see connector documentation).
7. Insert each network cable into one of the network
ports.
8. Ensure that the network cables are securely in place by pulling slightly on them.
9. If the inverter is installed outdoors, install overvoltage protection for all components in the
network.
10. If you would like to integrate the inverter into a local network, connect the other end of a
network cable to the local network (e.g. via a router).
6.6 Connection to the Multifunction Relay
6.6.1 Pin assignment MFR
Digital input Pin Assignment
1 2
3
1 NO
2 CO
3 NC