Active production, ATEX-rated, multi-protocol fieldbus
The 3RW5545-6HA04: It carries ATEX and IECEx certification for use in explosive atmospheres — that's the headline differentiator versus a standard soft starter. The trip class is field-selectable among 10A, 10E (default), 20E, and 30E per IEC 60947-4-2, giving you the flexibility to match motor starting characteristics from light-duty conveyors to high-inertia loads. Rated supply voltage spans 200…480 V, covering common low-voltage networks worldwide. Screw terminals mean standard panel wiring without crimp tooling changes.
Fieldbus, analog feedback, and application-specific starting profiles
Built-in fieldbus support includes Modbus RTU, Modbus TCP, EtherNet/IP, and PROFIBUS — no separate communication module needed for most networks. The analog output is configurable as 4…20 mA or 0…10 V, feeding motor current or torque feedback to a PLC or DCS. Application-specific features include torque control, a breakaway pulse for high-friction starts, and pump ramp down to eliminate water hammer. Combined braking and DC braking handle rapid stopping without external contactors. The unit also logs events, maintains an error logbook, and supports firmware updates — useful for commissioning diagnostics and future protocol upgrades.
Mounting, ambient derating, and compliance documentation
Physical dimensions are 393 mm high, 210 mm wide, 203 mm deep. Required clearance: 100 mm above, 75 mm below, 10 mm forward, 5 mm to each side, 0 mm backward — plan the enclosure depth and ventilation accordingly. Ambient operating range is -25…+60 °C, with derating required above 40 °C. In a warm panel, that means you need to check the continuous current at the actual ambient — the 40 °C derating point is the thermal design limit for full rating. Approvals include UL, CSA, and CE marking — accepted in North America and the EU. The accuracy class is 5 per IEC 61557-12, and service factor is 1.15.