Introduction
This manual provides comprehensive instructions for the FERMAX Monitor Duox Plus Veo-Xs 4.3", a state-of-the-art video intercom monitor designed for residential communication. It offers clear video, an easy-to-use interface, and integration capabilities within the Duox Plus system. Please read this manual thoroughly before installation and operation to ensure proper use and longevity of your device.
Safety Information
- Read all instructions carefully before installation and operation.
- Ensure power is disconnected before any installation or maintenance procedures.
- Do not expose the device to moisture, direct sunlight, or extreme temperatures.
- Only use original accessories and components supplied or approved by FERMAX.
- Refer to qualified personnel for complex installations, wiring, or repairs.
- Keep the device away from strong magnetic fields.
Package Contents
The FERMAX Monitor Duox Plus Veo-Xs 4.3" package typically includes:
- FERMAX Monitor Duox Plus Veo-Xs 4.3" unit
- Installation guide (this manual)
- Note: A wall mounting plate (Fermax Ref. 9447) may be required for initial installation and is often sold separately. Please check your specific product packaging.
Product Overview
The FERMAX Monitor Duox Plus Veo-Xs 4.3" features a compact design with a 4.3-inch LCD screen and intuitive controls for seamless operation.
Front View
This image shows the front of the FERMAX Monitor Duox Plus Veo-Xs 4.3" with its 4.3-inch display and control buttons. The display is capable of showing a live video feed from the outdoor panel, and the buttons below provide access to various functions.

Side View
This image displays the side profile of the FERMAX Monitor Duox Plus Veo-Xs 4.3", highlighting its slim and modern design, suitable for various interior aesthetics.

Back View and Connections
The rear view of the monitor shows the mounting points and connection terminals for power and communication lines. Essential product information, including model and serial numbers, is also visible on the label.

Control Buttons
A close-up of the control buttons located on the front panel of the monitor, providing quick access to key functions.

Button Functions:
- F1 Button: A programmable function button, its specific action depends on system configuration.
- Call Answer/Hang-up Button: Used to establish or terminate communication with a visitor at the outdoor panel.
- Camera View Button: Activates the camera to view the outdoor panel without an incoming call.
- Door Release Button: Unlocks the main entrance door.
Setup
Installation Requirements
- Ensure a stable and appropriate wall surface for mounting.
- Verify compatibility with your existing FERMAX Duox Plus system.
- As noted in customer feedback, a wall mounting plate (Fermax Ref. 9447) may be necessary for initial installation and is often sold separately.
Wiring Diagram
Refer to the detailed wiring diagram provided with your specific system installation guide for precise connections. The monitor connects to the Duox Plus bus system using two wires for both power and data.

Mounting the Monitor
- Secure the wall mounting plate (if applicable and purchased separately) to the desired location on the wall using appropriate screws and anchors.
- Connect the Duox Plus bus wires to the designated terminals on the monitor as indicated in the wiring diagram. Ensure correct polarity.
- Carefully attach the monitor to the wall mounting plate, ensuring it clicks securely into place.
- Restore power to the system and test the monitor's functionality.
Operating the Monitor
Answering a Call
When a visitor calls from the outdoor panel, the monitor will ring and display the visitor's image on the screen. Press the Call Answer/Hang-up button to establish two-way audio and video communication.
Viewing the Outdoor Panel
To view the outdoor panel without an incoming call (e.g., to check who is at the door), press the Camera View button. The monitor will display the live feed from the outdoor camera.
Opening the Door
During an active call or while viewing the outdoor panel, press the Door Release button to unlock the main entrance door.
Adjusting Settings
The monitor may offer on-screen menu options for adjusting various settings such as volume, brightness, and call tones. Navigate these menus using the physical buttons or touchscreen if available. Refer to the on-screen prompts for specific navigation instructions.
Maintenance
Cleaning
Clean the monitor's screen and casing with a soft, dry, lint-free cloth. For stubborn marks, a slightly damp cloth with mild, non-abrasive cleaner can be used, but ensure no liquid enters the device. Do not use harsh chemicals, solvents, or abrasive materials.
Software Updates
Periodically check the official FERMAX website (www.fermax.com) for any available firmware updates for your specific model. Keeping your device's software up-to-date ensures optimal performance, security, and access to new features.
Troubleshooting
| Problem | Possible Cause | Solution |
|---|---|---|
| No image on screen | No power to the monitor; loose connection; issue with the outdoor panel camera. | Check power supply to the system; verify all wiring connections are secure; test the outdoor panel camera functionality. |
| No audio during call | Monitor volume too low; faulty audio connection; issue with outdoor panel microphone/speaker. | Adjust monitor volume settings; check audio wiring; test outdoor panel audio. |
| Door release not working | Incorrect wiring for door release; faulty lock mechanism; system configuration issue. | Verify door release wiring according to diagram; test the electric lock mechanism independently; consult system installer for configuration check. |
| Monitor not responding to button presses | Power interruption; system malfunction; software issue. | Disconnect and reconnect power to the entire system (power cycle); if issue persists, contact technical support. |
Specifications
| Feature | Detail |
|---|---|
| Brand | FERMAX |
| Model Number | 8424299094489 |
| Screen Size | 4.3 Inches |
| Display Resolution | SD VGA 480p (Maximum 854 x 480) |
| Aspect Ratio | 16:9 |
| Screen Surface Description | Glossy |
| Contrast Ratio | 2000:1 |
| Response Time | 1 Millisecond |
| Refresh Rate | 50 Hz |
| Power Consumption | Input: 18-24 Vdc; Standby: 0.8 W; Max: 6.5 W (Product specification lists 128 Watt, which may be a general system rating) |
| Material | Metal, Plastic, Polycarbonate |
| Color | Multicolor |
| Special Features | Touchscreen (as per specification, though primary interaction is via buttons) |
| Mounting Type | Wall Mount |
| First Available Date | February 29, 2020 |
Warranty and Support
For detailed warranty information, technical support, and service inquiries, please refer to the official FERMAX website or contact your local authorized distributor. It is recommended to keep your purchase receipt as proof of purchase for warranty claims.
FERMAX Official Website: www.fermax.com
FERMAX Store on Amazon: Visit FERMAX Store







