1. Introducció
The OREI UKM-404 is a versatile USB 3.0 4x4 Matrix Peripheral Sharing Switch designed to allow up to four different computer hosts to share four USB 3.0 devices. This device provides a seamless solution for managing peripherals like keyboards, mice, printers, scanners, and other USB devices across multiple systems, enhancing efficiency in various environments.

Image 1.1: The OREI UKM-404 USB 3.2 Gen 1 4x4 Matrix Peripheral Sharing Switch shown with its included remote control.
2. Característiques clau
- 4x4 USB Matrix: Share up to 4 USB devices between 4 computer hosts.
- Transferència de dades d'alta velocitat: Supports USB 3.2 Gen 1 with data transfer rates up to 5Gbps.
- Compatibilitat enrere: Fully compatible with USB 2.0 and USB 1.1 devices.
- Powered USB-A Ports: Provides 5V/1.5A power output on all USB-A device ports for stable peripheral performance.
- Plug-and-Play: No driver installation required for operation.
- Suport ampli de sistemes operatius: Compatible with Windows, Linux, and macOS.
- Múltiples opcions de control: Switch control via front panel buttons, included IR remote, RS-232, or WebGUI.

Image 2.1: A summary of the key features of the OREI UKM-404, including USB 3.2 Gen 1 compliance, 5Gbps data transfer, 5V/1.5A USB-A output, plug-and-play functionality, and multi-OS compatibility.
3. Contingut del paquet
Si us plau, verifiqueu que tots els elements siguin presents al vostre paquet:
- 1x OREI UKM-404 USB 3.0 4x4 Matrix Peripheral Sharing Switch Unit
- 1x control remot IR
- 1 cable receptor IR
- 4x USB 3.0 Type A to Type B Cables
- 1x 3-pin 3.81mm Phoenix Connector
- 1x Power Adapter (US plug, with adapter/converter for international use)
- 1x Manual d'usuari (aquest document)

Image 3.1: Visual representation of the items included in the OREI UKM-404 package: the main unit, remote control, IR receiver cable, four USB cables, Phoenix connector, power adapter, and user manual.

Image 3.2: The OREI UKM-404 unit shown with its remote control and an example power adapter (UK plug variant).
4. Producte acabatview
4.1 Tauler frontal
- Botó d'encesa: Toggles the device power on/off.
- Receptor IR: Receives signals from the IR remote control.
- Device 1-4 Host Indicators/Buttons: Each set of buttons (H1-H4) corresponds to a shared USB device (DEVICE 1-4). Pressing a button assigns that device to the selected host. LEDs indicate the active host for each device.
4.2 Panell posterior
- Port TCP/IP: Ethernet port for network control via WebGUI.
- Port RS-232: Serial port for control via RS-232 commands.
- IR EXT Port: Connects the external IR receiver cable for extended remote control range.
- HOST 1-4 Ports: USB 3.0 Type B ports for connecting to your computer hosts.
- DEVICE 1-4 Ports: USB 3.0 Type A ports for connecting your USB peripheral devices.
- Entrada d'alimentació DC 24V: Connecta l'adaptador d'alimentació inclòs.

Image 4.1: Rear panel of the OREI UKM-404, detailing the TCP/IP, RS-232, IR EXT, Host (USB Type B), Device (USB Type A), and DC 24V power input ports.
5. Instruccions de configuració
Follow these steps to set up your OREI UKM-404:
- Connect Host Computers: Use the provided USB 3.0 Type A to Type B cables to connect your four computer hosts (PCs, laptops) to the HOST 1-4 ports on the rear panel of the UKM-404.
- Connectar dispositius USB: Connect your USB peripheral devices (keyboard, mouse, printer, scanner, webcam, microphone, etc.) to the DEVICE 1-4 USB 3.0 Type A ports on the rear panel.
- Connectar l'alimentació: Connecteu l'adaptador de corrent continu de 24 V inclòs a la DC 24V power input on the rear panel, then plug the adapter into a power outlet.
- Encès: Press the power button on the front panel to turn on the UKM-404. The device is plug-and-play and does not require any driver installation.
- Optional IR Extension: If desired, connect the IR Receiver Cable to the IR EXT port on the rear panel and place the IR receiver in a convenient location for remote control operation.

Image 5.1: Connection diagram illustrating how to connect four host computers (USB Type B) and four USB peripheral devices (USB Type A) to the OREI UKM-404.
Nota: Els ports USB 3.2 Gen 1 no admeten vídeo DisplayPort™ (mode alternatiu DP) ni subministrament d'energia (PD).
6. Funcionament
The OREI UKM-404 offers multiple methods for switching USB device assignments between hosts:
6.1 Botons del panell frontal
Each of the four DEVICE sections on the front panel has four buttons labeled H1, H2, H3, and H4. To assign a specific USB device to a host, press the corresponding host button (e.g., H1 for Host 1) within that device's section. The LED next to the selected host button will illuminate to indicate the active connection.
6.2 comandament a distància IR
The included IR remote control provides convenient wireless switching. Each row of buttons on the remote corresponds to a DEVICE (1-4), and each column corresponds to a HOST (H1-H4). Press the button that matches the desired device and host combination to switch. Ensure the remote has a clear line of sight to the IR receiver on the front panel or the external IR receiver.

Image 6.1: Demonstrates easy switching of USB devices between computers using the included remote control or the front panel buttons.
6.3 RS-232 Control
For advanced control and integration into automation systems, the UKM-404 can be controlled via RS-232 commands. Refer to the detailed command set in the full user manual for specific instructions on serial communication.
6.4 WebControl GUI
The device features a built-in WebGUI for network-based control. Connect the UKM-404 to your network via the TCP/IP port. Access the WebGUI through a web browser using the device's IP address to manage and switch device assignments remotely. Consult the full user manual for initial setup and access details for the WebGUI.
7. Especificacions
| Característica | Detall |
|---|---|
| Número de model | UKM-404 |
| Estàndard USB | USB 3.2 Gen 1 (USB 3.0) |
| Velocitat de transferència de dades | Fins a 5 Gbps |
| Ports d'amfitrió USB | 4x USB tipus B. |
| Ports de dispositius USB | 4x USB tipus A |
| Sortida d'alimentació del port USB-A | 5V/1.5A per port |
| Mètodes de control | Front Panel Buttons, IR Remote, RS-232, WebGUI |
| Compatibilitat de sistemes operatius | Windows, Linux, macOS |
| Dimensions (L x A x A) | 8 x 6 x 1.5 polzades (270 mm x 166 mm x 30 mm) |
| Pes | 2 lliures (1.16 kg) |
| Material | Heavy Duty Metal Enclosure |
| Font d'alimentació | DC 24V |

Image 7.1: Technical specifications of the OREI UKM-404, highlighting its compact and lightweight design, dimensions, weight, and metal enclosure.
8. Solució De Problemes
If you encounter issues with your OREI UKM-404, please refer to the following common troubleshooting steps:
- Sense energia: Ensure the 24V DC power adapter is securely connected to both the UKM-404 and a working power outlet. Check if the power indicator LED on the front panel is lit.
- Devices Not Detected:
- Verify that all USB cables (Type A to Type B for hosts, Type A for devices) are securely connected.
- Ensure the correct host is selected for the device you are trying to use, either via the front panel buttons or remote control.
- Try connecting the USB device directly to the computer to confirm the device itself is functional.
- Restart the UKM-404 unit and the connected computers.
- Problemes de commutació:
- If using the IR remote, ensure there is a clear line of sight to the IR receiver. Replace remote batteries if necessary.
- Test switching using the front panel buttons to isolate if the issue is with the remote or the unit itself.
- Slow USB Speeds: Ensure all connected cables are USB 3.0 compatible. While the UKM-404 is backward compatible, using older USB 2.0 or 1.1 cables/devices will limit speeds to their respective standards.
9. Garantia i Suport
OREI stands behind the quality of its products. The UKM-404 comes with the following:
- Garantia del fabricant de 12 mesos: Cobreix defectes de materials i fabricació en condicions d'ús normal.
- Lifetime OREI Tech Support: Accés a assistència tècnica durant tota la vida útil del vostre producte.
For warranty claims, technical support, or further assistance, please contact OREI customer service through their official weblloc web o la informació de contacte proporcionada amb la documentació de compra.





