Should we be concerned about the polarisation of switch coils?
Diagram of the operation of a double coil. Feeding coil A, the core moves to the left. Feeding B, it moves to the right. A, B and COM in black are the three wires coming out of the device and connecting to the decoder.
Esempio di test condotto su un deviatoio Märklin*
DON’T DO THIS! The Fleiscmann* 640000 turnout coil must operate between 14 and 18V. We powered them at 25V separately with a DCC100-E, as in the image. Effectively, we notice a drop in performance and a reduction in service life. By supplying 18V instead, this coil was as reliable and long-lived as all the others.
* Names marked with an asterisk are registered trademarks of third parties and are the property of their respective owners.