Potential free contact

Potential-free contact

This terminal is found on the interface board. It enables the following features, which are configurable in the app:

Option 1: Emergency stop

This option allows the charging process to be stopped immediately when the input circuit is opened or closed.

If charging is in progress and the input state changes to trigger an emergency stop, the session is put ON HOLD.

If the charger is idle and the input state changes to trigger an emergency stop, a new session can be started but will immediately be put ON HOLD.

The ON HOLD status is visible in the app when the charger is in this state.

When an emergency stop is active, the blue LEDs will light up in sequence from top to bottom.

The charger will immediately stop charging.

Option 2: Block or allow charging

This option allows charging to be blocked or allowed when the input circuit is opened or closed.

If charging is in progress and the input state changes to block charging, the session will be put ON HOLD.

If the charger is idle and the input state changes to block charging, a new session can be started but will immediately be put ON HOLD.

The ON HOLD status is visible in the app when the charger is in this state.

When charging is blocked, the blue LEDs will light up in sequence from top to bottom.

The charger will wait 2 seconds to check for false positive signals before stopping or restarting the charge.

Option 3: Reduce charging rate

This option reduces the charging rate when the input circuit is opened or closed.

If power reduction mode is selected, the user can configure the new, lower charging rate (from 6 A to the maximum allowed by the charger).

The charger will wait 2 seconds to check for false positive signals.

If power is reduced by the potential-free contact, the LED light sequence will not change.

The user can see the cause of the power reduction in the app's diagnostic screen.

If the rotary switch is set to a value lower than the one configured in the app, the charging amperage will decrease to match the switch's setting. If the switch is set to a higher value, the amperage will remain at the app-defined limit. If the rotary switch is in an invalid position, the amperage will default to 6 A.

By default this setting must be set to allow charging when circuit is open (Option 2).

Potential-free contact can work with or without DLM/SOLAR/OCPP integration.

If charging was blocked by potential-free contact and later unblocked, charger will apply randomized delay before starting charging (if it's enabled)

If charging was blocked by either Option 1 or Option 2 and later unblocked, or its charging power was reduced by Option 3 but was allowed to return to normal rate - charger will start charging from lowest possible power and later ramp up gradually (at a rate of 10% of the rated power per minute).

Charger is able to send information to OCPP server informing it why charging is not allowed or why power is decreased.