Introduction
The Victron Energy Cyrix-ct Intelligent Battery Combiner is designed to automatically connect two batteries in parallel when one of them has reached a pre-set voltage (indicating it is being charged). It disconnects the batteries when the voltage drops below a float level. This intelligent management ensures that the primary (starter) battery is always fully charged and isolated from the secondary (service) battery, preventing accidental discharge of the starter battery.
Safety Information
Please read all safety instructions before installing or operating the Cyrix-ct unit. Failure to follow these instructions may result in electric shock, fire, or serious injury.
- Always disconnect all power sources from the battery system before performing any installation, maintenance, or wiring work.
- Ensure adequate ventilation around the Cyrix-ct unit to prevent overheating.
- Use appropriately rated fuses for all battery connections as specified in the installation section. Fuses protect against short circuits and overcurrents.
- This device is designed for 12V or 24V DC battery systems. Verify your system voltage before connecting the unit.
- Consult a qualified electrical professional if you are uncertain about any aspect of the installation or wiring.
- Do not expose the unit to water or excessive moisture.
Product Overview
The Cyrix-ct is a robust, microprocessor-controlled battery combiner that intelligently manages the charging of multiple battery banks. It incorporates over-current and over-temperature protection for enhanced safety and reliability.
Key Features
- Microprocessor-controlled for precise and reliable operation.
- Maximum continuous charge current: 230 Amp.
- Supports two independent battery banks.
- Simple and straightforward installation process.
- Includes a 'Start Assist' function for emergency parallel connection of batteries.
Figure 1: Victron Energy Cyrix-ct Intelligent Battery Combiner overview, highlighting microprocessor control, 230A maximum charge current, support for two batteries, and ease of installation.
Components
- Main Unit: Cyrix-ct Intelligent Battery Combiner.
- Status LED: A blue indicator light showing the operational status of the unit.
- Start Assist (Red) Terminal: An input for an optional momentary switch to manually engage parallel connection.
- Battery 1 (+) Terminal: Connects to the positive terminal of the primary battery (e.g., starter battery).
- Battery 2 (+) Terminal: Connects to the positive terminal of the secondary battery (e.g., service battery).
- Battery (-) (Black) Terminal: The common negative/ground connection for the unit.
Figure 2: Front view of the Cyrix-ct unit, showing the status LED, Start Assist terminal, and battery connection terminals.
Dimensions
Figure 3: Physical dimensions of the Cyrix-ct unit, measuring approximately 80mm (3.2 inches) in height, 46mm (1.8 inches) in width, and 46mm (1.8 inches) in depth.
Specifications
| Feature | Detail |
|---|---|
| Model Number | CYR010230010 |
| Voltage Compatibility | 12V / 24V (auto-sensing) |
| Maximum Continuous Current | 230 Amp |
| Peak Current | 500 Amp (for 5 seconds) |
| Connect Voltage (12V) | 13.0V - 13.8V (adjustable) |
| Disconnect Voltage (12V) | 12.8V (fixed) |
| Connect Voltage (24V) | 26.0V - 27.6V (adjustable) |
| Disconnect Voltage (24V) | 25.6V (fixed) |
| Power Consumption (Open) | < 4 mA |
| Power Consumption (Closed) | 12V: 16 mA; 24V: 30 mA |
| Product Dimensions (L x W x H) | 2 x 4 x 2.6 inches (approx. 51 x 102 x 66 mm) |
| Item Weight | 9.5 ounces (approx. 269 grams) |
| Operating Temperature Range | -40°C to +60°C (-40°F to +140°F) |
| Protection Class | IP54 (when mounted with terminals facing downwards) |
| Battery Compatibility | Compatible with Lead-Acid, Gel, AGM, and Lithium Ion batteries. |
Installation
Proper installation is critical for the safe and efficient operation of the Cyrix-ct. Ensure all safety precautions are followed.
Wiring Diagram
The following diagram illustrates a typical installation with a starter battery and a domestic (service) battery, an alternator, and an optional MultiPlus inverter/charger. Always ensure appropriate fusing for all positive battery connections.
Figure 4: Typical wiring diagram for the Cyrix-ct, connecting starter and domestic batteries, an alternator, and an optional MultiPlus inverter/charger. Ensure all connections are fused appropriately.
Installation Steps
- Mounting: Select a dry, well-ventilated location for the Cyrix-ct. Secure the unit firmly using appropriate fasteners.
- Ground Connection: Connect the Battery (-) (Black) terminal of the Cyrix-ct to the common negative busbar or directly to the chassis ground. This connection is essential for the unit's operation.
- Battery 1 Connection: Connect the Battery 1 (+) terminal to the positive terminal of your primary battery (e.g., starter battery). Install an appropriately sized fuse (e.g., 225A for the 230A model) in this positive line, as close to the battery as possible.
- Battery 2 Connection: Connect the Battery 2 (+) terminal to the positive terminal of your secondary battery (e.g., service battery). Install an appropriately sized fuse in this positive line, as close to the battery as possible.
- Start Assist (Optional): For the emergency parallel connection feature, connect the Start Assist (Red) terminal to a momentary push-button switch. The other side of this switch should be connected to a fused positive source (e.g., the positive terminal of either battery). This allows manual engagement of the combiner for 30 seconds.
- Verify Connections: Carefully double-check all wiring for correct polarity, secure connections, and proper fuse installation.
- Power On: Once all connections have been thoroughly verified, reconnect power to the battery system.
Operation
The Cyrix-ct operates automatically to ensure optimal charging of both battery banks without user intervention during normal use.
Automatic Operation
When the voltage on one of the connected batteries rises above a pre-set threshold (indicating that it is being charged by an alternator, shore power charger, or solar charger), the Cyrix-ct will automatically engage, connecting the two batteries in parallel. This allows the charging source to charge both battery banks simultaneously.
Conversely, when the voltage drops below a pre-set threshold (indicating discharge or no active charging), the Cyrix-ct will automatically disengage, isolating the batteries. This prevents the service battery from inadvertently discharging the starter battery.
Figure 5: Illustration of parallel charging. The Cyrix-ct connects batteries when the starter battery voltage indicates charging, allowing both banks to receive charge.
Start Assist Function
In an emergency situation, such as a discharged starter battery, the Start Assist function can be utilized to temporarily connect the batteries in parallel, allowing the service battery to assist in engine starting.
- Press and hold the momentary switch connected to the Start Assist (Red) terminal.
- The Cyrix-ct will engage for a duration of 30 seconds, connecting the batteries.
- Release the switch once the engine starts or after the 30-second period.
Status LED
The blue Status LED on the unit provides visual feedback on its operational state:
- Solid Blue: Indicates that the batteries are currently connected in parallel.
- Off: Indicates that the batteries are disconnected.
- Flashing: May indicate a specific condition or fault. Refer to the troubleshooting section for detailed interpretations.
Maintenance
The Cyrix-ct is designed for minimal maintenance, ensuring long-term reliability. Regular checks can help maintain optimal performance.
- Regular Inspection: Periodically inspect all cable connections to the Cyrix-ct for tightness and signs of corrosion. Loose or corroded connections can lead to poor performance or overheating.
- Cleanliness: Keep the unit clean and free from dust, dirt, and excessive moisture. Use a dry cloth for cleaning.
- Fuse Check: If the unit is not operating as expected, check the fuses in the positive battery lines. Replace any blown fuses with ones of the correct rating.
Troubleshooting
This section provides solutions for common issues encountered with the Cyrix-ct.
| Problem | Possible Cause | Solution |
|---|---|---|
| Cyrix-ct does not engage (LED off) | No voltage on either battery above the connect threshold; Ground wire not connected or loose; Blown fuse in a battery line. | Check battery voltages to ensure at least one battery is being charged; Verify the ground wire is securely connected; Inspect and replace any blown fuses. |
| Cyrix-ct engages but batteries do not charge effectively | Faulty charging source; High resistance in wiring; Blown fuse in a battery line. | Verify the operation of your charging source (alternator, charger); Check all cable connections for corrosion or looseness; Inspect and replace fuses. |
| Start Assist function not working | Faulty momentary switch or wiring to the Start Assist terminal. | Check the momentary switch and its wiring to the Start Assist (Red) terminal for proper connection and functionality. |
| Unit feels excessively hot | Overcurrent condition; Insufficient ventilation; Loose connections. | Reduce electrical load or check for short circuits in the system; Ensure adequate airflow around the unit; Tighten all connections. The Cyrix-ct has built-in over-temperature protection and will disconnect if it overheats. |
Warranty and Support
Victron Energy products are manufactured to high standards and are known for their reliability. For detailed warranty information, please refer to the official Victron Energy website or consult your authorized Victron Energy dealer.
For technical support, product documentation, or further assistance, please visit the official Victron Energy Support page or contact a Victron Energy professional in your region.