SIEMENS 3RK1 903-0BA00 PM-D Power Module for ET 200S Motor Starters

Technical Specifications

Main Features and Advantages

Integrated diagnostic capability: The SIEMENS 3RK1 903-0BA00 features built-in diagnostic functions that continuously monitor the 24V DC supply voltage for the connected motor starters and frequency converters . This diagnostic function allows the ET 200S system to detect undervoltage conditions or supply faults in real time, enabling rapid fault identification and reducing troubleshooting time for maintenance personnel. By providing visibility into the health of the power distribution, the SIEMENS 3RK1 903-0BA00 helps prevent unexpected motor stoppages and supports proactive maintenance strategies.

Modular ET 200S integration: As a native component of the SIMATIC ET 200S distributed I/O system, the SIEMENS 3RK1 903-0BA00 offers seamless integration with the platform’s modular terminal architecture . It plugs directly onto a TM-P terminal module and interfaces with the self-assembling potential bars that distribute power to subsequent motor starters and frequency converter modules. This design simplifies wiring, reduces installation time, and enables flexible system configurations where multiple power modules can be deployed within a single ET 200S station to power different potential groups.

Reliable power distribution architecture: The SIEMENS 3RK1 903-0BA00 is designed to supply both load voltage (for motor operation) and sensor voltage (for feedback and control signals) through the ET 200S power bus . This dual-supply capability ensures that motor control circuits and their associated sensors receive clean, regulated 24V DC power from a single source, simplifying system design and reducing the need for external power supplies. The module’s placement requirement—installed upstream from the first motor starter—ensures proper power sequencing and protection for the entire motor starter group.

Durability for industrial environments: Engineered for demanding industrial applications, the SIEMENS 3RK1 903-0BA00 features an IP20 protection class and robust construction suitable for control cabinet installations . Its lightweight design (0.071 kg) and compact form factor minimize physical stress on the terminal module and allow efficient use of cabinet space . As an active lifecycle product, the SIEMENS 3RK1 903-0BA00 continues to receive full Siemens support, providing customers with long-term availability and compatibility assurance.