Technical Specifications
| Parameter Name | Parameter Value |
|---|---|
| Product Model | 3RK1 903-0AA00 (TM-P15S27-01) |
| Manufacturer | SIEMENS |
| Product Type | Terminal Module / Power Module Mounting Base |
| Target System | ET 200S Distributed I/O System, SIRIUS Motor Starters |
| Number of Contacts | 10 contacts |
| Current Rating | 16A |
| Voltage Rating | 250V AC |
| Supply Voltage | 24V DC (typical) |
| Power Consumption | Max 10 W |
| Operating Temperature | -25°C to +70°C |
| Storage Temperature | -40°C to +85°C |
| Protection Rating | IP20 |
| Connection Type | Spring-Cage / Pluggable terminals |
| Mounting Type | DIN-rail mount |
| Material | Dielectric Polymer / High-grade aluminum alloy |
| Dimensions (approx.) | 100 x 100 x 40 mm |
| Weight | Approx. 0.23 kg |
| Compliance Standards | CE, UL, IEC 61131-2, EN 61131-3 |
| Communication Interface | RS-485 (select configurations) |
Main Features and Advantages
Terminal module for power modules:
The SIEMENS 3RK1 903-0AA00 is specifically designed as a terminal module for power modules (TM-P) within the ET 200S system . The SIEMENS 3RK1-903-0AA00 provides the physical mounting platform and electrical connections for PM-D power modules, which perform voltage monitoring and protection functions for downstream motor starters and frequency converters . In combination with the power module, the SIEMENS 3RK1 903-0AA00 enables comprehensive motor protection with adjustable current ranges (0.30A to 16.0A) for motors up to 7.5kW . This modular architecture allows the SIEMENS 3RK1-903-0AA00 to be used any number of times within an ET 200S station, providing flexible scalability .
Built-in power distribution bus:
The SIEMENS 3RK1 903-0AA00 incorporates a robust three-phase power distribution busbar with a 50A load capacity . This internal busbar enables the SIEMENS 3RK1 903-0AA00 to distribute power efficiently to multiple motor starters or frequency converters mounted within the same station. The terminal module supports screw-type terminals for connecting external circuits, accommodating conductor cross-sections up to 10mm² . Additional optional terminal blocks can be mounted on the SIEMENS 3RK1-903-0AA00 to form neutral (N) or protective earth (PE) busbars, enhancing system grounding and safety .
Tool-free spring-cage connection:
The SIEMENS 3RK1 903-0AA00 features a spring-cage connection system that enables quick, secure, and tool-free wiring . This connection technology significantly reduces installation time compared to traditional screw terminals, improving commissioning efficiency and reducing maintenance costs . The spring-cage design also ensures reliable electrical contact even under vibration, making the SIEMENS 3RK1-903-0AA00 suitable for demanding industrial applications .
