Rexnord-Stephan S4 Catalogue

04-2007 3P0200-XX7. Technical Appendix7.3.20 Brake rectifierThe brake rectifiers being used generate the necessary direct voltage (DC) for operating the brake from the ACsupply voltage (AC).Dependent upon the voltage applied, one-way or bridge rectifiers are used.The brakes are usually switched on the AC side. However, the brakes can also be switched on the DC side forshort brake application times. For this purpose, the built-in switching bridge must be removed.77.3.21 Tachometer generatorIf speed control or synchronous control is required, the motors can be equipped with tachometer generators orpulse generators.T33