# Power supply MDT STV-0640.02 REG bus voltage supply 640 mA for KNX/Bus systems

**URL:** https://aio.lv/en/product--mdt-stv-064002--11285571
**Data updated:** 2026-04-02 14:26 (EEST)
**Category:** Home Automation
**Manufacturer:** MDT
**Manufacturer code:** STV-0640.02
**EAN:** 4251916100070
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 214.99 €
**Prices and availability valid until:** 2026-07-20 23:59
**Price without VAT (21%):** 177.68 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--mdt-stv-064002--11285571

## Delivery options

| Delivery method | Delivery time | Cost |
|---|---|---|
| Office pickup (2b. Kengaraga str., Riga, Latvia, LV-1063) | 23.07.2026 | free |
| Pickup points | 28.07.2026 | 1.89 EUR |
| Courier delivery to door | 28.07.2026 | 4.99 EUR |

## Summary description

MDT STV-0640.02 is a bus voltage supply (REG) delivering 640 mA for KNX/fieldbus installations. Designed to provide stable bus voltage to sensors, actuators and controllers, it mounts in standard distribution panels and ensures continuous power for bus devices. Use it where a dedicated 640 mA supply for bus systems is required.

## Long description

MDT STV-0640.02 is a REG bus voltage supply that delivers 640 mA for KNX and other bus/fieldbus systems. It is designed for installation in standard DIN distribution panels and provides a stable, continuous supply voltage to sensors, actuators and controllers on the bus. The compact module supplies devices that require a regulated bus voltage and supports environments where a dedicated 640 mA power source for bus devices is required.
Advantages
The unit supplies a consistent regulated output current of 640 mA suitable for typical KNX bus loads, reducing the risk of undervoltage at connected devices. Its form factor is compatible with standard distribution panels for easy mounting and integration. Built for continuous operation, the device helps maintain stable communication and reliable performance of fieldbus components.
Suitable for
 Supplying KNX bus devices such as sensors, actuators and interface modules
 Small to medium-sized bus installations requiring a 640 mA regulated supply
 Mounting in residential or commercial distribution panels
Key specifications
 Output current: 640 mA regulated
 Intended use: Bus/fieldbus voltage supply for KNX systems
 Mounting: DIN rail / distribution panel compatible module
 Continuous operation suitable for powering sensors, actuators and controllers
 Compact width: fits 4 TE (module space) in distribution panels
How to use
Install the MDT STV-0640.02 on the DIN rail inside the distribution panel and connect the input to the mains supply according to local electrical regulations. Connect the regulated bus output to the KNX or fieldbus line, ensuring correct polarity and secure terminations. Verify that the total bus load does not exceed the 640 mA rating and, if needed, combine with additional supplies or power boosters per system design. Perform commissioning checks to confirm stable bus voltage and device communication.
Usage recommendations
Ensure installation and wiring are performed by a qualified electrician and observe relevant national standards. Regularly check total device current draw on the bus to avoid overloads and allow for future device additions when planning capacity.

## FAQ

### How much does the MDT STV-0640.02 REG 640 mA bus power supply cost, and is it available for purchase?

The price is 214.99 € (valid at the time of publication and already includes all taxes). The item is available for order — 11 pcs. are in stock, and you can place your purchase right now with delivery across Latvia and Europe or choose pickup at the Riga collection point. We offer favorable purchase terms, including the option to split the payment into convenient monthly installments. Availability and price are updated in real time, so we recommend placing your order in advance.

### If I order this product today, when will I receive my order?

If you place your order today, delivery will be as fast and convenient as possible. You will be able to pick up your order on 23.07.2026 at the Riga pickup point or choose delivery across Latvia and Europe. We carefully inspect every purchase and pack it securely for safe transportation.

### What payment options are available?

AiO.lv offers several payment methods: Bank transfer. All transactions are 100% secure and encrypted.

### Can this product be purchased for a company (with VAT)?

Yes. AiO.lv works with legal entities in Latvia and across Europe. The product price already includes VAT. For certain product categories, as well as for companies from other EU countries with a valid VAT number, a 0% VAT rate may apply. We issue the invoice immediately after the order is placed, support electronic BIS invoices, and automatically generate all necessary accounting documents. You can complete the purchase for a company online — simply select the company profile and choose bank transfer as the payment method during checkout.

### What is the warranty period?

All MDT products come with an official 2 Years warranty. It covers all manufacturing defects and malfunctions that may occur during use. The warranty is valid at all authorized MDT service centers and through AiO.lv

### Can the product be returned after purchase?

Yes, you can return the product within 14 days of purchase if you bought it as a consumer (not a legal entity). Returns are possible without giving any reason — the main condition is that the product retains its original appearance and full set of accessories. We will make the process as simple and convenient as possible: just contact our customer support team, and we will help you arrange the return.

### Where should I contact for warranty service?

For warranty-related questions you can contact the AiO.lv (SIA VSPRO) customer support team. More information about warranty service: https://aio.lv/en/warranty

## Image

https://aio.lv/img/cache/product/11285571/68659357_large.webp