The Siemens 3RK1903-3BA00 is a PM-D F PROFISAFE power module designed for failsafe motor starter configurations. It integrates with a failsafe contact multiplexer and provides six tripping groups, making it a central power distribution and isolation point within a SIRIUS safety circuit.
Integration Context
Mounts on a DIN rail within a control panel, typically adjacent to the failsafe motor starters it powers. The six tripping groups allow segmenting a safety zone into independent isolation paths, which simplifies fault finding and reduces downtime during maintenance — a single group can be isolated without dropping power to the entire safety circuit.