Victron Cyrix-Li-ct 12/24V 120A battery coupler isolation relay

Intelligent battery coupler Cyrix-Li-ct

The Cyrix-Li-ct connects a lead-acid starter battery and a LiFePO4 battery:

- when the VE.Bus BMS Charge Disconnect output is high and - when it measures 13.4 V (or 26.8 V) or more at its power terminals.

The Cyrix switches off immediately:

- when its control output reaches the "free floating" state (open circuit), indicates a cell overvoltage or a cell overtemperature and/or - when the battery voltage drops below 13.2 V.

Start Assist function: a short positive pulse closes the relay for 30 seconds (see figure on page 2). A built-in TVS diode limits the voltage spike that can occur if the Cyrix suddenly shuts down due to cell overvoltage or overtemperature.