SIRIUS reversing starter for AS-Interface
The Siemens 3RK4320-3BQ54-1BA2 is a SIRIUS reversing motor starter with integrated AS-Interface communication — a compact electromechanical unit that handles forward/reverse motor control and bimetal overload protection in one package. Control supply is 20.4-26.4 V DC, and the main circuit voltage range is 340-440 V AC — the DC control rail is typical for AS-Interface bus-powered stations, keeping the field wiring to a single bus cable plus motor leads.
Dimensions are 205 mm deep, 245 mm wide, 215 mm high — the footprint is sized for a standard enclosure backplate with room for the AS-Interface bus tap and motor cable gland plate. IP54 enclosure rating means it's protected against dust ingress and splashing water — suitable for dry indoor industrial environments like conveyor lines or packaging cells, but not for direct washdown.
RoHS compliance date is 05/01/2012 — the part meets the EU substance restrictions for current industrial installations.