Switching has never been this easy

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    Switching has never been so easy. A relay board specially designed for making reliable circuits on your model railroad.

    It consists of 4 relays, each with two changeover contacts with status LED and extinguishing diode. It can be used for:


    Point polarization of turnouts
    Switching of various applications
    Choice of switching between programming or driving voltage
    Switching block voltage across alternating streets (Dinamo)
    Switching of the shadow station via 1 block output (Dinamo application)

    The printed circuit board can be supplied in both a 12 V DC variant and a 5 V DC variant. With your order you can make a choice. In addition to the voltage, you can also choose between a kit or assembled print.

    A manual and application examples for the HPP4 are available on our website www.domburgtrainsupport.com

    Read more

    Switching has never been so easy. A relay board specially designed for making reliable circuits on your model railroad.

    It consists of 4 relays, each with two changeover contacts with status LED and extinguishing diode. It can be used for:


    Point polarization of turnouts
    Switching of various applications
    Choice of switching between programming or driving voltage
    Switching block voltage across alternating streets (Dinamo)
    Switching of the shadow station via 1 block output (Dinamo application)

    The printed circuit board can be supplied in both a 12 V DC variant and a 5 V DC variant. With your order you can make a choice. In addition to the voltage, you can also choose between a kit or assembled print.

    A manual and application examples for the HPP4 are available on our website www.domburgtrainsupport.com

    Read more