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Victron Energy Cyrix-Li-load 24/48V-120A – Intelligent Load Disconnect Relay for Lithium Systems (CYR020120450)
The Cyrix-Li-load 24/48V-120A is a specialized relay designed to manage high-current DC loads in lithium-based energy systems. Working alongside a Victron VE.Bus BMS, the relay provides automated load disconnection during undervoltage conditions to protect battery integrity. Once the battery recovers, the relay attempts reconnection in a controlled manner, ensuring stability and preventing oscillations. With low idle consumption and IP54 protection, it’s a smart, robust alternative to mechanical relays.
Main Features
- Engineered for 24V and 48V Victron lithium battery systems
- Rated for 120 A continuous current at 24V; 40 A breaking capacity at 48V
- Compatible with VE.Bus BMS for automated load disconnect control
- Reconnect logic based on voltage thresholds and delays
- Ultra-low standby current draw (<4 mA)
- Compact and weather-resistant housing (IP54)
Electrical Specifications
Parameter Value Nominal System Voltage 24V / 48V Continuous Current Rating 120 A Breaking Capacity @ 48V 40 A Control Input High (≈ battery voltage): Engage
Low or Floating: DisengageIdle Power Consumption <4 mA
Voltage Threshold Logic
Condition Thresholds Delay Reconnect 26.8V < V < 27.4V
27.4V < V < 27.8V
V > 27.8V120s
30s
4sDisconnect 26.6V > V > 26.4V
V < 26.4V10s
Immediate
Reconnection Behavior
- If voltage recovers, Cyrix attempts reconnection after 30 seconds
- Allows three re-engagement attempts
- Stays disconnected until battery reaches 26V+ for 30s (indicating recharge)
Mechanical & Environmental
Parameter Value Dimensions (HxWxD) 46 × 46 × 80 mm Weight 0.11 kg (0.24 lbs) Protection Rating IP54 Operating Temperature -20°C to +50°C Humidity Max. 95% (non-condensing)
Certifications
- Protection: Built-in transient voltage suppression
- Designed for Victron LiFePO₄ battery systems with integrated cell balancing
Application Scenarios
Perfect for 24V and 48V Victron lithium systems in campervans, boats, or off-grid setups, the Cyrix-Li-load 24/48V-120A ensures safe, efficient power management by protecting batteries from excessive discharge. It enables reliable load automation without the bulk or consumption of mechanical relays.
Documents
Victron Energy Cyrix Li-ion 120 A Size: 908,2 Kb -