Maintenance teams planning replacements for KNX-20E-640 frequently review Weidmuller Power Supply, Meanwell Drdn20 24 and SMPS Bihar to prevent downtime, checking availability and compatibility with existing systems.
Meanwell KNX-20E-640 DIN Rail Power Supply
The Meanwell KNX-20E-640 Power Supply offers 20W, 30 output voltage, 0.64A, DIN rail Power Supplies. Manufactured by Meanwell under the Meanwell MDR-100-48 Power Supply category, this model belongs to the KNX series.
| Brand | Meanwell |
| Product Type | Power Supply |
| Model Number | KNX-20E-640 |
Meanwell KNX-20E-640 DIN Rail Power Supply – Technical Specifications
| Specification | Value |
|---|---|
| Series | KNX |
| Description | AC-DC KNX EIB DIN rail power supply with integrated choke; Output 30Vdc at 640mA; plastic case |
| Technology | AC/DC |
| Power Format | DIN rail |
| Output Power (W) | 20 |
| Output Voltage (V) | 30 |
| Output Current (A) | 0.64 |
| Input Voltage (V) | 180 - 264 |
| IP Rating | No IP assigned |
| Width (mm) | 52.5 |
| Height (mm) | 90 |
| Depth (mm) | 54.5 |
| Dimming Technology | KNXNo Dimming |
| Control Signals | KNX |
The KNX-20E-640 SMPS from Meanwell features robust AC/DC technology with a compact DIN rail mount format, optimized for smart building power distribution. It provides a regulated output voltage of 30V DC and a maximum output current of 0.64A, delivering up to 20W of stable power for KNX-based automation systems. Built with an integrated choke and compliant with KNX standards, it supports control signals over KNX and offers seamless integration into existing electrical networks. The input voltage range of 180–264V AC ensures global compatibility across a wide range of power sources.
This model is housed in a space-saving plastic casing with dimensions of just 52.5mm width, 90mm height, and 54.5mm depth, making it ideal for tight control cabinets or building automation panels. Although it carries no specific IP rating, it is engineered for protected indoor environments. Its KNXNo Dimming technology ensures reliable non-dimming operation, ideal for mission-critical lighting and automation controls. For engineers and system integrators seeking dependable performance and global support, Meanwell KNX-20E-640 SMPS stands out as a reliable choice backed by industry reputation and precision engineering.
The Meanwell KNX-20E-640 SMPS is specifically engineered for building automation and energy management systems that follow the KNX standard. It powers KNX bus devices such as actuators, sensors, timers, and interface modules across homes, offices, and industrial facilities. Because it offers 30V output with a built-in choke, it eliminates the need for external bus couplers and enhances stability across long-distance installations.
Maintenance engineers often prefer this model in scenarios where reliable, 24/7 KNX power is essential—such as lighting control panels, HVAC systems, and access control units. Its compact DIN rail mounting allows fast installation in cramped panels. With no requirement for dimming, the KNX-20E-640 is ideally suited for fixed-power automation needs.
For engineering students and junior technicians learning KNX infrastructure, this model serves as a textbook example of how DIN rail SMPS solutions integrate into intelligent control systems. Its clear design, efficient voltage handling, and Meanwell’s global support make the Meanwell KNX-20E-640 SMPS an ideal reference point for modern automation power supply applications.
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