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To set-up RS-485 peripherals, such as CT clamps or energy meters, and to correctly set the
SCARAB's power configuration use the "Configuration of external devices" tab:
For CT use only: main fuse setting
should equal the overall
installation ampacity as dictated
by the MCB's current rating
Required: defines the phase
configuration of the device.
Incorrect setting will result in
a fault state!
For RS-485 peripherals: sets the
protocol for communication to the
respective device.
Incorrect setting will result in a
fault state!
Important note: If a CT clamp is used as a peripheral, the charger will continuously monitor the
RS-485 bus. If it loses connection with the clamp, charging will be automatically limited to 6A.
This applies both to single and three-phase configurations. A 3-phase CT clamp can be used with
a single-phase charger, but not vice-versa!
When an energy meter is used as peripheral, the charger uses the meter's voltage, current, and
power measurements to calculate and store energy. If communication between the meter and
the EVSE is lost or a meter is not present, the charger will enter a fault state, which can be cleared
by reconnecting or by disabling the RS-485 peripherals in the web UI.
With an energy meter in use, the charger can no longer monitor the total installation consumption.
Therefore, only a CT clamp peripheral should be used where power limiting may be necessary or
desirable.
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