1. Introduction
This manual provides comprehensive instructions for the Ritto RGE1786770 Color Video Home Station, a TwinBus video door intercom system. It covers installation, operation, maintenance, and troubleshooting for its 89mm TFT color display, 10 selectable functions, adjustable volume, optical call indicator, night function, and light switching capabilities. Please read this manual thoroughly before operating the device to ensure proper function and safety.
2. Safety Instructions
- Electrical Safety: Installation and wiring must be performed by a qualified electrician in accordance with local electrical codes and regulations. Disconnect power before performing any installation or maintenance.
- Environmental Conditions: Do not expose the device to extreme temperatures, humidity, or direct sunlight. Avoid placing it near heat sources or in areas with excessive dust.
- Cleaning: Use a soft, dry cloth for cleaning. Do not use liquid or aerosol cleaners, as they may damage the device.
- Modifications: Do not attempt to open or modify the device. Unauthorized modifications can lead to electric shock, fire, or damage to the product, and will void the warranty.
- Children: Keep the device out of reach of children to prevent accidental damage or injury.
3. Product Overview
The Ritto RGE1786770 is a color video home station designed for use with TwinBus intercom systems. It features a high-quality display and intuitive controls for communication and door access.
Key Features:
- 89 mm (3.5 inch) TFT color display with LED backlight (320 x 240 RGB resolution).
- 10 selectable functions.
- Adjustable call volume (8 levels).
- Call mute function with optical feedback.
- Optical call indicator.
- Night function.
- Light switching capability.
- Door opening button, compatible with camera module 18787 or camera switch 14915.
- Distinction between door calls and floor calls.
- Adjustable screen brightness, color, and contrast.
- Scratch-protected screen.
- User guidance and commissioning via On-Screen Display (OSD) in 13 languages.
Components:

Figure 1: Ritto RGE1786770 Color Video Home Station. This image shows the complete unit, featuring a white casing. On the left is the handset, connected by a coiled cord. On the right, the upper section contains the color video display, currently showing a person's face. Below the screen is a circular navigation button cluster. Further down, there are two pairs of buttons: two on the left (one with a pause/play icon, one plain white) and two on the right (one with a gear icon, one plain yellow). A speaker grille is visible on the left side of the main unit, below the handset cradle, and the Ritto logo is printed below it.
- Handset: For audio communication.
- Color TFT Display: Shows video feed from the door station and OSD menu.
- Navigation Buttons: Used for menu navigation and function selection.
- Door Open Button: Activates the door release mechanism.
- Function Buttons: For various operations such as call mute, light switching, and settings access.
- Speaker/Microphone: Integrated for hands-free communication when the handset is cradled.
4. Setup
The Ritto RGE1786770 Color Video Home Station is designed for integration into a TwinBus system. Professional installation is highly recommended to ensure correct wiring and optimal performance.
4.1. Installation Location
Choose a suitable indoor location, away from direct sunlight, heat sources, and areas prone to moisture. Ensure the mounting height allows for comfortable viewing of the display and access to the handset and buttons.
4.2. Wiring
- Power Disconnection: Before beginning any wiring, ensure the main power supply to the intercom system is completely disconnected.
- TwinBus Connection: Connect the TwinBus lines from the main intercom system to the designated terminals on the back of the home station. Refer to the detailed wiring diagram provided with the product packaging for specific terminal assignments.
- Auxiliary Connections: If connecting to external camera modules (e.g., 18787) or camera switches (e.g., 14915), follow their respective wiring instructions and connect them to the appropriate terminals on the home station.
- Mounting: Securely mount the home station to the wall using the provided mounting hardware.
- Power Restoration: Once all connections are secure and the unit is mounted, restore power to the system.
Note: Incorrect wiring can damage the device and the entire intercom system. If you are unsure, consult a professional installer.
5. Operating Instructions
The Ritto RGE1786770 offers various functions accessible via its display and control buttons.
5.1. Receiving a Call
- When a visitor presses the call button at the door station, the home station will ring, and the display will show the video feed from the door camera.
- To answer the call, lift the handset or press the designated answer button (refer to button layout in Section 3).
- To end the call, replace the handset or press the end call button.
5.2. Opening the Door
During an active call or when viewing the door camera, press the door open button to activate the door release mechanism. The door open button is typically marked with a key symbol.
5.3. Screen and Menu Navigation
The 89mm TFT color display provides a clear view of visitors and access to the On-Screen Display (OSD) menu for settings adjustments.
- Use the circular navigation buttons to move through menu options. The central button typically confirms selections.
- The OSD menu supports 13 languages for user guidance.
5.4. Adjusting Settings
- Call Volume: Access the settings menu to adjust the call volume across 8 available levels.
- Call Mute: Activate the call mute function via a dedicated button or menu option. An optical indicator will confirm that calls are muted.
- Night Function: Enable the night function through the menu for specific operational modes during nighttime hours.
- Screen Settings: Adjust brightness, color, and contrast of the display via the OSD menu to suit your preferences.
- Light Switching: If connected to a compatible lighting system, use the designated button or menu option to control external lights.
6. Maintenance
Regular maintenance ensures the longevity and optimal performance of your Ritto RGE1786770 Color Video Home Station.
- Cleaning the Unit: Wipe the exterior of the unit and the screen with a soft, dry, lint-free cloth. Do not use abrasive cleaners, solvents, or chemical sprays, as these can damage the surface and the scratch-protected screen.
- Handset and Cord: Periodically check the handset and coiled cord for any signs of wear or damage.
- Ventilation: Ensure that any ventilation openings on the unit are not obstructed by dust or debris.
7. Troubleshooting
This section addresses common issues you might encounter with your Ritto RGE1786770. For problems not listed here, contact customer support.
| Problem | Possible Cause | Solution |
|---|---|---|
| No image on display. |
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| No sound during a call. |
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| Door does not open. |
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| Unit is unresponsive. |
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8. Specifications
| Feature | Detail |
|---|---|
| Brand | Ritto |
| Model Number | RGE1786770 |
| Manufacturer | RITTO |
| Product Dimensions (L x W x H) | 1 x 1 x 1 cm |
| Item Weight | 9.07 grams |
| Quantity of Items | 1 |
| Batteries Included | No |
| Batteries Required | No |
| Country of Origin | Germany |
9. Warranty and Support
For warranty information and technical support, please refer to the documentation provided with your purchase or contact your authorized Ritto dealer. Keep your proof of purchase for warranty claims.



