3RK1903-0CE00 SIEMENS

3RK1903-0CE00 Siemens Basis unit

Brand：SIEMENS Model number：3RK1903-0CE00

Country of origin: Germany Product weight：0.55kg

HS code：8517623990

Product Details：

Product Dimensions：

The 3RK1903-0CE00 functions as a dedicated power supply module for the SIRIUS motor starters integrated into the SIMATIC ET 200pro system. It is engineered to facilitate a structured, pluggable power connection directly within or adjacent to the control cabinet or IP65 decentralized environment. By utilizing standardized connector interfaces, it reduces wiring complexity and minimizes potential wiring errors during installation and maintenance. The module provides both the control supply voltage and the necessary power routing required for high-density motor starter configurations.

Product Parameters

Product Brand Name: Siemens SIRIUS
Product Type: Power supply module / connection module for ET 200pro motor starters
Rated Operational Voltage: Standard $24 \text{ VDC}$ control voltage supply
Rated Operational Current: Up to $8 \text{ A}$ continuous current depending on the connected load configuration
Degree of Protection: IP65 / IP67 rated enclosure protection when fully mated with matching components, making it dust-tight and resistant to water jets
Connection Technology: Pluggable power terminal connector / screw-clamp terminals for internal wiring
Ambient Operating Temperature: $-25\text{°C}$ to $55\text{°C}$ ( $-13\text{°F}$ to $131\text{°F}$ )
Mounting Type: Direct mounting onto the ET 200pro rack or backplane module structure
Dimensions: Standard compact ET 200pro module footprint for seamless cabinet-free or decentralized installation

Product Advantages

A major advantage of the 3RK1903-0CE00 is its Plug-and-Play Design, which dramatically speeds up installation and replacement times for motor starters in field applications. Its High Protection Rating allows power distribution to be handled directly on the machine without requiring heavy, expensive control cabinets.

The Modular Scalability ensures that power can be fed efficiently to multiple motor starters in a daisy-chain or bus configuration, lowering total installation and hardware costs. Additionally, the Vibration-Resistant Construction ensures continuous electrical contact even when mounted on heavy machinery or moving conveyor systems.

Important Considerations and Precautions

When installing the 3RK1903-0CE00, it is critical to ensure that Power is Completely Disconnected before inserting or removing the module to prevent electrical arcing and connector pin damage. Technicians must verify that the Current Load Limits are strictly maintained within the rated specs to prevent thermal overload on the internal conductors.

Always check the Sealing Gaskets and ensure that all mounting screws are fully tightened to maintain the IP65/IP67 ingress protection rating; missing or damaged seals will compromise the module against moisture and dust contamination. Finally, adhere to local wiring guidelines regarding Cross-Sectional Cable Area to minimize voltage drop across the $24 \text{ VDC}$ control line over long distances.

Product Applications

The Siemens 3RK1903-0CE00 is used across industrial manufacturing and automated processing environments where decentralized motor control is implemented.

Conveyor Systems: Powering decentralized ET 200pro motor starters along extensive airport baggage, parcel, and material handling lines.
Automotive Assembly: Distributing control power to motor drives and actuators across body shop and final assembly stations.
Packaging Machinery: Providing power connections for high-speed indexing motors and wrapper drives mounted directly on machine frames.
Food and Beverage: Serving as a reliable power distribution node in washdown areas where cabinet-free IP65/IP67 protection is required.
Logistics and Warehousing: Supplying power to automated guided vehicles (AGVs) and high-density sorting equipment.

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