SMA Solar Technology AG
4 Electrical Connection
Installation Manual
MFR-NR-IA-en-23
21
Using the Multifunction Relay as a Fault Indicator Contact or Operation Signaling
Contact
You can use the multifunction relay as a fault indicator contact for displaying or reporting inverter
errors. This requires a parallel connection. Alternatively, you can choose to have the undisturbed
operation displayed or reported. This requires a series connection. You can connect several inverters
to one fault indicator or operation indicator. You must connect the multifunction relays of several
inverters in parallel.
Figure 6: Wiring diagram with several inverters for connection of an operation signaling contact and wiring
diagram for connection of a fault indicator contact (example)