Siemens 3RK1903-0BA00 Power Module

Siemens 3RK1903-0BA00 is the PM-D power module for ET 200S motor starters, delivering a 24 V DC supply to the starter assembly and its control circuitry. Designed for use within Siemens ET 200S starter configurations, the PM-D provides the DC power that energizes the motor-starter coil, supports the related control logic, and interfaces with the ET 200S backplane in a compact, modular automation cabinet. The device is identified by the order number 3RK1903-0BA00 and is clearly labeled as a PM-D power module for motor starters within Siemens' SIMATIC 3RK family. In typical ET 200S installations, the PM-D participates in centralized power distribution for 24 V DC coil circuits, enabling straightforward wiring alongside direct starter modules and terminal modules in a shared backplane. This combination supports scalable automation layouts, from small machine modules to larger panel assemblies, where reliable DC power delivery to motor-start components is essential for consistent startup sequencing.