Connect signal source to MFR

If there are several inverters in the system, the multifunction relay should be connected to the inverter that is configured as the System Manager.

Additionally required material (not included in the scope of delivery):

  • 1 conduit (trade size: 19.05 mm (0.75 in) or smaller with suitable reducer bush)

  • Sealing compound for sealing the join between the conduit and inverter if a weep hole has been added to the conduit

  • 1 rain-tight conduit fitting or conduit fitting for wet locations complying with UL 514B (trade size: 19.05 mm (0.75 in) or smaller with suitable reducing bush)

Requirements:

  • The technical requirements of the multifunction relay must be met Technical Data for Inverter.

DANGER

Danger to life due to electric shock

When connecting signals with voltages above 30 V to the switch connection, there is a risk of life-threatening electric shock.

  1. Only connect signals with protective extra-low voltage (< 30 V).

Procedure:

  1. Disconnect the inverter from all voltage sources ( > Disconnecting the Inverter from Voltage Sources).
  2. Remove the filler plug from the enclosure opening for the connection of an energy meter via RS485 and the connection to the multifunction relay.
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  3. Guide the communication cable through the conduit into the inverter.
  4. Attach the conduit to the conduit fitting.
  5. Dismantle 20 mm (0.79 in) of the cable.
  6. Strip the insulation off the conductor 6 mm (0.24 in).
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  7. Unlock the conductor inserts on the provided 3-pole connector.
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  8. Connect the conductors to the supplied 3-pole connector. To do so, plug the conductors into the conductor entries and close the conductor entries. Observe the connector assignment.
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  9. Plug the 3-pole connector into the socket MFR on the communication assembly. Observe the pin assignment.
  10. Ensure that the connector is securely in place.
  11. Ensure that all conductors are correctly connected.
  12. Ensure that the conductors sit securely in the terminal points.
  13. If a weep hole has been added to the conduit, seal the conduit with sealing compound.

    Also see:

    Pin assignment MFR
    Connecting a Rapid Shutdown Initiator