Hazardous-area soft starter — ATEX and IECEx certified
The Siemens 3RW5513-1HF04 is a soft starter with explicit ATEX (Yes) and IECEx (Yes) certification, making it suitable for installation in explosive atmospheres where motor starting must not become an ignition source. Rated operating voltage is 200 to 480 V, covering common low-voltage motor supplies in process plants and refineries. Trip classes per IEC 60947-4-2 are selectable: CLASS 10A, 10E (default), 20E, or 30E — the 10A/10E setting matches standard motor acceleration profiles, while 20E/30E accommodate high-inertia loads where extended ramp time is required.
Motor control and protection features
DC braking (Yes) enables rapid stopping of motors with high residual flux, useful on conveyors or centrifuges where coast-down time must be minimized. Voltage ramp (Yes) and pump ramp down (Yes) allow controlled acceleration and deceleration — the pump ramp down reduces water hammer in pipeline applications. Breakaway pulse (Yes) delivers a momentary torque boost to break stalled loads free before the soft-start ramp engages. Torque control (Yes) provides closed-loop regulation of motor torque during start and stop, improving repeatability for process-critical drives. Motor heating (Yes) and service factor of 1.15 allow the starter to account for motor thermal capacity during overload conditions.
Fieldbus connectivity and diagnostics
Supports PROFIBUS (Yes), Modbus RTU (Yes), Modbus TCP (Yes), and EtherNet/IP (Yes) — the fieldbus selection is made via the optional communication module, not hardwired, so the same base unit adapts to different plant networks. PROFIenergy (Yes) enables coordinated energy management when paired with a PROFINET high-feature communication module, allowing the starter to pause during production breaks. Diagnostic tools include an event list (Yes), error logbook (Yes), and trace function (Yes) — the trace captures start/stop current profiles for commissioning or fault analysis without an external data logger. Analog output (Yes) provides a 4-20 mA (default) or 0-10 V signal proportional to motor current, feeding directly into a PLC analog input or panel meter for local indication.
Installation and clearance requirements
Dimensions: 170 mm width, 275 mm height, 152 mm depth — the unit occupies a standard panel footprint with screw terminal connections (Yes) for power and control wiring. Minimum clearance around the device: 100 mm upwards, 10 mm forwards, 0 mm backwards, 75 mm downwards, and 5 mm at the sides — these ensure adequate airflow for the internal heatsink and prevent thermal derating.
UL approval (Yes), CSA approval (Yes), and CE marking (Yes) cover North American and European regulatory acceptance — the ATEX and IECEx certifications add hazardous-location compliance per IEC 60079 series. Accuracy class 5 per IEC 61557-12 applies to the integrated current measurement — suitable for motor protection and energy monitoring without an external CT. B10d value of 1,588,000 cycles indicates the expected number of operations until 10% of a population fails — relevant for safety-related applications where the starter's reliability data supports SIL calculations. Fail-safe state (Yes) is open load circuit — on loss of control power or internal fault, the output contacts open, de-energizing the motor by default.