victron energy Cyrix-Li-ct Intelligent Li-ion Battery Combiners Instructions

June 28, 2024
victron energy

victron energy Cyrix-Li-ct Intelligent Li-ion Battery Combiners

victron-energy-Cyrix-Li-ct-Intelligent-Li-ion-Battery-Combiners-
PRODCUT

Specifications

  • Model: Cyrix-ct 12/24V-230A intelligent battery combiner
  • Protection: Overheating protection
  • Prioritization: Starter battery prioritization
  • Voltage Sensing : Bidirectional voltage sensing
  • Battery Monitoring: Intelligent battery monitoring
  • System Compatibility: 12/24 Volt auto-ranging
  • Continuous Current: 230A
  • Cranking Rating (5 seconds): 500A
  • Voltage Range: 12.8V to >16V
  • Current Consumption:
    • When open: 0 sec
    • When closed : 1 sec
  • Start Assist: 10 sec
  • Protection Category: Yes
  • Weight: Not specified
  • Dimensions (h x w x d): Not specified

No voltage loss
The Cyrix-ct 230 battery combiner is a microprocessor controlled heavy duty relay that automatically connects batteries in parallel when one battery has reached a preset voltage (indicating that the battery is being charged), and disconnects when the voltage decreases below float level (indicating that one or both batteries are being discharged).

Cyrix-ct battery combiners are an excellent replacement for diode isolators. The main feature is that there is virtually no voltage loss so the output voltage of alternators or battery chargers does not need to be increased.
Protection against overheating (due to a long-duration overload e.g.)

The Cyrix will disengage in case of excessive contact temperature, and engage again after it has cooled down.
Prioritizing the starter battery

In a typical setup, the alternator is directly connected to the starter battery. The accessory battery, and possibly also a bow thruster and other batteries are each connected to the starter battery by Cyrix-ct battery combiners. When a Cyrix-ct senses that the starter battery has reached its connect voltage, it will engage to allow for parallel charging of the other batteries.
Bidirectional voltage sensing

The Cyrix-ct senses the voltage of both connected batteries. It will therefore also engage if for example the accessory battery is being charged by a battery charger.
Intelligent battery monitoring to prevent repeated switching.

The software of the Cyrix-ct does more than simply connect and disconnect based on battery voltage and with a fixed time delay. The Cyrix-ct looks at the general trend (voltage increasing or decreasing) and reverses a previous action only if the trend has reversed during a certain period. The time delay depends on the voltage deviation from the trend.

12/24 Volt auto-ranging
The Cyrix-ct will automatically adjust to a 12V or 24V system.

Installation

Installation (see figure below)

  1. The Cyrix-ct can only be used in 12V or 24V installations with a negative common.
  2. Disconnect the minus of both batteries.
  3. Place the Cyrix-ct closest to the smallest battery (in general the starter battery).
  4. Connect the plus of the batteries to the brass bolts of the Cyrix-ct. Install a fuse in series (see fig). The fuse should be sized under the wire cross section used, but not exceed 230A.
  5. Connect the minus of the Cyrix-ct “battery –“ and reconnect the minus of both batteries.
  6. An emergency start push button can be wired to the “start assist” connection if required. The relay will engage for 30 seconds after  “start assist” has been momentarily connected to the battery plus. Alternatively, a parallel connect switch can be used to engage the relay as long as the switch remains closed.victron-energy-Cyrix-Li-ct-Intelligent-Li-ion-Battery-Combiners-fig-3

Specification

victron-energy-Cyrix-Li-ct-Intelligent-Li-ion-Battery-Combiners-
fig-2

Approximate connect and disconnect delay (multiply by two for a 24 V system) victron-energy-Cyrix-Li-ct-Intelligent-Li-ion-Battery-Combiners-
fig-1

  • LED status indication
  • LED on: engaged
  • LED 2 s flash: connecting
  • LED 0,25 s blink: alarm
  • LED 10 s flash: disengaged
  • LED 2 s blink: disconnecting

Victron Energy bv / De Paal 35 / 1351 JG ALMERE / The Netherlands www.victronenergy.com / e-mail: sales@victronenergy.com

Frequently Asked Questions

  • Q: How does the LED status indication work?
    • A: The LED status indication on the Cyrix-ct provides visual feedback on its operation. When the LED is on, it indicates that the device is engaged. A 2-second flashing LED signifies connection, while a 0.25-second blinking LED indicates an alarm situation. A 10-second flashing LED means disengagement and a 2-second blinking LED indicates disconnection.

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