Connection to the Multifunction Relay

Qualified person

817878540

Connecting terminal plate for the connection to the multifunction relay

Requirement:

Cable requirements:

  • The cable must be double-insulated.
  • External diameter: 5 mm to 12 mm
  • Conductor cross-section: 0.08 mm² ... 2.5 mm²
  • The cable type and cable-laying method must be appropriate for the application and location.

NOTICE

Destruction of the multifunction relay as a result of excessive contact load

  1. Observe the maximum switching voltage and maximum switching current ( > Technical Data).
  2. When connecting the multifunction relay to the utility grid, fuse the multifunction relay with a separate circuit breaker.

Operating the multifunction relay and 485 Data Module Type B or SMA Power Control Module in parallel

If you want to operate the multifunction relay and the 485 Data Module Type B or the SMA Power Control Module in parallel, a voltage of no more than 30 V DC or 25 V AC may be connected to the multifunction relay.

Procedure:

  1. When connecting to the utility grid, fuse the multifunction relay with a separate circuit breaker.

  2. DANGER

    Danger to life due to high voltages

    1. Ensure that the inverter is disconnected from all voltage sources ( > Disconnecting the Inverter from Voltage Sources).
  3. Prepare the cable:

    • Dismantle the cable by no more than 15 mm.

    • Strip off the conductor insulation by max. 8 mm.

  4. Prepare the cable gland M25 for the connection to the multifunction relay as follows:

    • Remove the swivel nut from the cable gland and remove the filler plug.

    • Remove the one-hole cable support sleeve from the cable gland and insert the cable into the one-hole cable support sleeve.

    • Press the one-hole cable support sleeve with the cable into the cable gland and lead the cable into the inverter.

    • Screw the swivel nut onto the cable gland.

  5. Remove the protective cover of the multifunction relay.
  6. Depending on the operating mode, connect the cable to the connecting terminal plate for the connection to the multifunction relay in accordance with the circuit diagram ( > Connection Options).

  7. WARNING

    Danger to life due to live cables

    If, during inverter operation, an insulated conductor (L1, L2 or L3) becomes detached from the AC terminal, there is a risk of the multifunction relay cables being live. Touching the cables can cause fatal electric shock.

    1. Reattach the protective cover to the multifunction relay. This isolates the AC connection area in the inverter from other terminals.
  8. Tighten the swivel nut of the cable gland.
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    >  DC Connection