The PureFize Velon X4 Evaluation kit
This evaluation kit comprises the Velon model X4, featuring four PureFize broad-spectrum UV light sources and the PureFize Ocean driver 2.2 unit with an integrated control interface. The UV light sources are designed for efficient operation without heat sinks or active cooling, simplifying integration and enhancing reliability.
| Product overview | |
|---|---|
| Product name: | PureFize Velon |
| Model: | X4 |
| Article no. | 42000 |
| Input: | 5 V DC 2A |
| Size: | 160x160x20 mm |
| Weight: | 300 g |
| UV source: | 4 pcs PureFize broad-spectrum UV light sources |
| UV wavelength: | 250-350 nm |
| Environmental conditions during operation: | +5°C to +40°C; 5% to 85% RH |
Recycling
This product complies with WEEE regulations and should not be disposed of with regular household waste. To recycle your Velon X4 module, please take it to an official collection point that can remove and recycle the electrical parts safely and professionally. Follow your country’s rules for collecting electrical products.
Good to know before use
- The light sources emit light with a viewing angle of at least 100°.
- The light sources cannot be activated without manual control of the I/O signal.
- The light sources do not have a safety limit for running time. When UV light is enabled through the digital signal, it will run indefinitely. PureFize can adjust this safety parameter if desired.
Ocean driver — overview
Built into the Velon X4 system, the Ocean 2.2 driver board is designed to run as a standalone driver or be connected via the Ocean 2.2 control interface to an additional control board for further user or system interaction with your application.
Since the UV light sources deliver UV output power directly proportional to the electrical input power, the driver is designed to deliver and maintain constant power (i.e., not constant voltage or constant current) to ensure precise UV dose control. This is done independently for each channel to allow for minor differences between the UV light sources.
| Item | Min | Norm | Max | Unit | Comments |
|---|---|---|---|---|---|
| Input voltage | 3.1 | 6 | VDC | ||
| No. of channels | 2 | 4 | |||
| Total output power | 1 | 3 | W | One common HV connection | |
| Output power configuration | 500 | 750 | mW | Per channel | |
| DC output voltage | 5.0 | 8.5 | kV |
An external control board can communicate with the Ocean 2.2 driver board via the digital Ocean control board interface and, among other things, turn on and off the UV chips via software.
PureFize preconfigures the default configurations, such as the number of UV chips, power (500 mw/750 mW), ON/OFF time, etc., using a desktop application that can be purchased from PureFize. The desktop application uses the Tx/Rx connection via an FTDI cable to the Tx/Rx pins on the Ocean 2.2 Driver Board.
UART settings: Baud rate: 9600, Parity: No parity, Data width: 8 bits, Stop bits: 1 bit, Flow control: No flow control
| Signal levels | Low | High | Unit | Comments |
|---|---|---|---|---|
| UV enable | 0 – 0.3 V | 1.8 – 9.5 | VDC | |
| Power enable | 0 – 0.3 V | 1.8 – Uin | VDC | |
| UV status | 0 | 2.5 | VDC | |
| Notice | 0 | 2.5 | VDC | |
| *Uart Tx (signal from driver) | 0 | 2.1 – 2.7 | VDC | * Requires PureFize developer software |
| *Uart Rx (signal to driver) | 0 | 2.5 | * Requires PureFize developer software |
Ocean driver — Functional description
- Input voltage: 3.1 – 6 V DC
- Total output power range: 1 – 3 W
- Output power per channel: 500 – 750 mW
- Number of output channels: 2 – 4 channels
- Delivers constant power independently for each UV chip. The power outputs are kept constant within ±10% regardless of time, operating point, and specific UV chip. The power output channels use a common positive HV connection and a separate negative connection for each UV chip.
- Designed and optimized for a minimum of 10,000 hours of operational lifetime, RoHS compliant, and designed to pre-comply with EMC & EMI regulations.
- Failsafe mechanisms are implemented.
- Designed to support up to 0.5-meter cable connections between the UV chips and the driver. Integrating a 750 kΩ series resistor for each channel on the UV chip side is recommended to minimize disturbance to the precise power control feedback loop.
Ocean control board interface
Via the digital Ocean control board interface, an external control board can communicate with the Ocean 2.2 driver board and, among other things, turn on and off the UV light sources by software.
The Ocean control board interface uses four signals:
- The UV enable signal controls the on/off without breaking the power supply connection. It can, for example, ensure that UV light is not on when there is a risk of exposure to humans. When UV enable is on, the UV light is turned on unless disabled by the software control interface.
- The power enable signal can turn on and off the driver board's power supply. The battery lifetime will be extended by turning off the power during periods when the UV light is not needed.
- UV status signal informs about the status of the UV chips and/or the Ocean 2.2 board driver itself. The signal can be configured to indicate an error (Error Mode) or when the UV light is turned on (Output Status Mode). Default Output Status Mode.
- The notice signal indicates that either runtime or high voltage output has exceeded a pre-configured value, e.g., 1,000 hours or 8300 V.