VMB8PBU - Smart Home Velbus - Free user manual and instructions
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| Product Type | Push Button Interface (8 buttons) |
| Dimensions (H x W x D) | 80 x 80 x 30 mm (wall-mount) |
| Weight | Approx. 150 g |
| Power Supply | 24 V DC (via Velbus bus) |
| Bus Current Consumption | Typical 30 mA at 24 V |
| Number of Inputs | 8 (push buttons, configurable) |
| LED Indicators | Red/Green status per button, programmable |
| Communication Protocol | Velbus (proprietary 2-wire bus) |
| Main Functions | Control of lights, blinds, scenes, dimmers, etc. |
| Configuration | Via VelbusLink software (PC) or manual programming |
| Operating Temperature | 0 °C to 40 °C |
| Ingress Protection | IP20 (indoor use only) |
| Mounting | Flush mounting in standard 60 mm junction box |
| Maintenance & Cleaning | Wipe with a soft, dry cloth; no liquids |
| Safety | Low voltage SELV; no electrical hazard |
| Spare Parts & Repairability | No user-serviceable parts; replace entire unit |
| Compliance | CE, RoHS |
| Warranty | 2 years (manufacturer) |
Frequently Asked Questions - VMB8PBU Velbus
What is the VMB8PBU used for?
The VMB8PBU is a push button interface for the Velbus home automation system. It provides 8 programmable buttons to control lights, blinds, scenes, or other devices connected to the Velbus bus.
How do I install the VMB8PBU?
Mount the device in a standard 60mm junction box. Connect the bus wires (V1, GND, V2) to the Velbus backbone. Ensure the bus is powered (24V DC). No additional power supply is needed.
Can I program the buttons without a PC?
Yes, basic programming can be done via the onboard programming button (tactile switch) and LED feedback. For advanced configuration, use the VelbusLink software on a PC.
How many devices can be connected to the same bus?
The Velbus bus supports up to 32 modules per bus segment, including the VMB8PBU. Use repeaters to extend the system.
What is the maximum cable length for the bus?
The maximum total bus length is 1000 meters at 24V using 0.6mm² wire. Keep branches short to avoid voltage drop.
Why are my buttons not responding?
Check the bus connections and ensure the bus power supply is working. Verify that the module's address is unique and not conflicting with other devices. Try resetting the module by disconnecting and reconnecting power.
Can I customize the LED behavior?
Yes, each button's LED can be configured to show status (on/off, dim, blink) using VelbusLink software. You can set different colors (red/green) for up to 9 levels.
Is the VMB8PBU compatible with other smart home systems?
No, the VMB8PBU is designed exclusively for the Velbus ecosystem. However, Velbus can integrate with third-party systems via gateways (e.g., KNX, HTTP API).
How do I reset the VMB8PBU to factory settings?
Press and hold the programming button (located on the back) for 10 seconds until all LEDs flash rapidly. Release. The device will restart with default parameters.
Where can I find the full user manual?
The full manual is available as a free PDF download on notice-facile.com or on the official Velbus website in multiple languages.
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USER MANUAL VMB8PBU Velbus
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Product information
Brand : Velbus
Model : VMB8PBU
Category : Smart Home