Kystar S4: DVI sending for a four-port LED system
The Kystar S4 is an LED sending box that receives a DVI video signal and transmits display data to compatible LED receiving cards through four Ethernet outputs. Its stated total load is 2.6 million LED pixels. The unit has an independent power supply and front-panel RUN and PWR indicators for checking operation.
Use S4 as the sending stage between a compatible video source or processor and the LED receiving system. It provides a straightforward DVI-based configuration with EDID management, stored backup data and accessory connections for audio and automatic brightness control.
Verified S4 specifications
| Specification | Details |
|---|---|
| Video input | 1 × DVI-D; standard and supported custom resolutions |
| LED outputs | 4 Ethernet ports |
| Total LED load | Up to 2,600,000 pixels |
| Per-port load | Up to 655,360 pixels, as listed in the model document |
| EDID and configuration | EDID management; storage of backup data for one-click recovery |
| Audio input | 1 × 3.5mm stereo input; audio transmission requires a compatible multifunction card |
| PC configuration | 1 USB control port |
| Serial interfaces | UART (RJ-45), UART IN and UART OUT |
| Brightness sensing | LIGHT SENSOR connection for a matching optical probe |
| Status indication | RUN operating indicator and PWR power indicator |
Practical uses and setup features
- DVI source connection: connect a compatible computer or video processor to the sending box.
- EDID management: configure a supported source resolution for the planned LED canvas.
- Configuration recovery: store backup data for the documented one-click recovery function.
- Brightness control: use a compatible light sensor to provide ambient-light information for automatic adjustment.
- Audio transmission: connect the stereo input with a suitable multifunction-card configuration.
Pixel mapping and revision checks
A 1920 × 1080 LED canvas contains 2,073,600 pixels, below the S4 total load. This is a pixel-budget example: the receiving-card chains, cabinet mapping and individual output loads must also fit. Four ports at their individual maximum do not remove the stated 2.6-million-pixel unit limit.
Check the supplied hardware and firmware revision before using extreme custom dimensions. The retained English specification lists a 4000-pixel width and 2000-pixel height for a port; the official v2.0 manual records a change to the height limit and lists 4000 pixels. These are dimensional ceilings, not fully loaded rectangular resolutions. Confirm the applicable limit and DVI timing for the actual unit before committing a wide or tall screen design.
The USB connection is a configuration port, not a documented USB media player. Confirm compatible receiving cards, source timing, cable mapping and any sensor or multifunction-card accessory before ordering. If your source needs HDMI as well as DVI, compare the Kystar S6 against its own input and total-load specifications.
Frequently asked questions
Does S4 include an HDMI input?
The documented S4 video input is DVI-D. Choose the sending model and source connection accordingly.
Does the audio input work by itself at the screen?
The manufacturer describes audio transmission together with a multifunction card. Confirm the receiving-side audio arrangement and compatible accessory.
Does automatic brightness control need a sensor?
Yes. The light-sensor connection accepts a matching optical probe that supplies ambient-light information.
Conclusion
S4 is a DVI sending option for an LED system within a 2.6-million-pixel budget, with four Ethernet outputs, EDID and configuration-backup functions. Verify the receiving-card layout, source timing and revision-specific dimension limits, then select any required audio or brightness accessories. Consult the official Kystar S4 v2.0 manual and the preserved English specification below.
Download Specification:
Kystar S4 LED Screen Control System Sending Box Specification
