DIN-rail Universal Electronic Relay Eltako EUD12NPN-UC (MPN 21100806 EAN )

Eltako EUD12NPN-UC is a DIN-rail mountable universal electronic relay designed for integration into building automation and control panels. It provides a compact interface for switching and signal conversion between sensors, NPN transistor outputs and downstream loads. The device is intended for applications where space is limited and reliable electronic switching with short reaction times is required.

Advantages

The relay offers a slim DIN-rail form factor that saves panel space and simplifies installation. Its universal input compatibility allows connection of common NPN outputs and switching sensors, reducing the need for separate interface modules. Electronic switching eliminates mechanical wear, provides fast response and supports silent operation in control circuits.

Suitable for

When it may not be suitable

The device is not intended as a direct replacement for high-power contactors or for switching significant mains currents without appropriate downstream relays or contactors. It may also be unsuitable where galvanic isolation between circuits is strictly required unless additional isolation measures are provided.

Key specifications

How to use

Install the relay on a standard DIN-rail in the control cabinet and connect the input wiring from sensors or NPN transistor outputs following the wiring guidelines in the manufacturer's documentation. Connect the output side to the downstream control circuit or to a relay/contactor appropriate for the load. Verify supply voltage and correct polarity before energising. After wiring, test the switching function with the control source and confirm correct integration with the automation system.

What to consider before purchase

Recommendations

Integrate the relay into a labelled control panel and document wiring connections to simplify maintenance. Use the module for low-voltage control tasks and pair with appropriate contactors for switching heavy loads. Follow the manufacturer's installation instructions and local electrical codes when wiring and commissioning.