1. Introduction
This manual provides detailed instructions for the installation, operation, and maintenance of the Fermax LOFT BUS2 Color 3.5-inch Monitor. The LOFT monitor is designed for use within the Fermax BUS2 digital intercom system, offering a simplified installation process and high-quality audio/video communication.
The Fermax LOFT monitor features an integrated design, a 3.5-inch color display, and is constructed from high-impact ABS plastic with a textured, easy-to-clean finish and UV protection for enhanced durability.
2. Safety Information
- Installation should only be performed by qualified personnel in accordance with local electrical codes and regulations.
- Disconnect power to the system before performing any installation, maintenance, or repair work.
- Do not expose the monitor to water, excessive moisture, or extreme temperatures.
- Use only Fermax-approved accessories and replacement parts.
- Keep the device away from strong electromagnetic fields to prevent interference.
3. Product Overview
The Fermax LOFT BUS2 Color 3.5-inch Monitor serves as the indoor unit for your video intercom system. It allows you to see and communicate with visitors at the entrance panel and to open the door.

Figure 1: Fermax LOFT BUS2 Color 3.5-inch Monitor. The image displays the white monitor with a 3.5-inch screen, a handset on the left, and control buttons on the right, including door release and function buttons.
Key Components:
- 3.5-inch Color Screen: Displays video from the outdoor entrance panel.
- Handset: For audio communication with visitors.
- Door Release Button: Activates the electric door lock.
- Function Buttons (F1, F2): Programmable for additional system functions (e.g., secondary door release, lighting control).
- Call Button: To initiate communication or activate the screen.
- Volume/Brightness Controls: Adjust audio volume and screen brightness (location may vary, refer to specific model diagram).
4. Setup and Installation
The Fermax LOFT monitor utilizes the BUS2 system, which simplifies installation with minimal wiring requirements while ensuring robust performance and high-quality audio/video signals throughout the installation. The system offers maximum immunity to external interference.
4.1 System Capabilities:
- Supports buildings with up to 199 dwellings.
- Accommodates up to 2 entry access points.
- Maximum distance from the first access point to the last dwelling: 250 meters.
- The BUS2 amplifier includes a voice synthesizer as standard.
4.2 Installation Steps (General):
- Mounting: Securely mount the monitor to a wall at an appropriate height using the provided mounting bracket and hardware.
- Wiring: Connect the BUS2 system wiring to the designated terminals on the monitor. Ensure all connections are secure and correctly polarized. Refer to the detailed wiring diagram provided with your specific installation kit.
- Power Connection: Connect the system to the main power supply. Verify that the power supply meets the system's requirements.
- System Configuration: After physical installation, the system may require configuration (e.g., addressing the monitor within the BUS2 network). Consult the main system controller manual for detailed programming instructions.
5. Operating Instructions
5.1 Receiving a Call:
When a visitor presses the call button at the entrance panel, the monitor will ring, and the screen will automatically activate, displaying the visitor's image.
5.2 Answering a Call:
Lift the handset to establish two-way audio communication with the visitor. If the screen is off, pressing the call button on the monitor may also activate it and establish communication.
5.3 Door Release:
During a call, press the Door Release Button (often marked with a key symbol) to unlock the entrance door. The BUS2 amplifier's voice synthesizer will announce: "door open, closing after entry."
5.4 Using Function Buttons (F1, F2):
The F1 and F2 buttons can be programmed for various auxiliary functions, such as activating a second door lock, turning on an external light, or calling another monitor within the system. Refer to your system's programming guide for specific functionalities.
5.5 Adjusting Volume and Brightness:
Use the dedicated controls (typically small dials or buttons on the side or bottom of the monitor) to adjust the audio volume of the call and the brightness of the screen display to your preference.
6. Maintenance
6.1 Cleaning:
The monitor is made from high-impact ABS plastic with a textured finish that is easy to clean. Use a soft, damp cloth to wipe the surface. Avoid abrasive cleaners, solvents, or harsh chemicals, as these can damage the finish and UV protection.
6.2 General Care:
- Ensure the monitor is not exposed to direct sunlight for prolonged periods, despite its UV protection.
- Do not attempt to open the monitor casing; this will void the warranty and may expose you to electrical hazards.
- If the handset cord becomes damaged, contact a qualified technician for replacement.
7. Troubleshooting
- No Image/Sound: Check that the monitor is properly powered and all BUS2 wiring connections are secure. Verify the entrance panel is functioning correctly.
- Door Not Opening: Ensure the door release button is pressed firmly during a call. Check the wiring to the electric lock and the status of the BUS2 system's door release module.
- Poor Audio/Video Quality: While the BUS2 system offers maximum immunity to interference, ensure there are no strong external electromagnetic sources near the wiring or monitor. Check for loose connections.
- Monitor Not Responding: Try cycling the power to the entire BUS2 system (turn off, wait 30 seconds, turn on). If the issue persists, contact technical support.
8. Specifications
| Feature | Specification |
|---|---|
| Brand | FERMAX |
| Model Number | 8424299032351 |
| Screen Size | 3.5 Inches |
| Display Type | LCD |
| Max Display Resolution | 800 x 600 |
| Refresh Rate | 60 Hz |
| Image Contrast Ratio | 2000:1 |
| Aspect Ratio | 16:9 |
| Screen Surface Description | Glossy |
| Special Features | BUS2 simplified installation system, Voice synthesizer |
| Material | High-impact ABS plastic with UV protection |
| Color | Multicolored (typically white/grey) |
9. Warranty and Support
For warranty information, please refer to the documentation provided at the time of purchase or contact your authorized Fermax dealer or installer. Technical support can be obtained through your local distributor or by visiting the official Fermax website.





