Soft starter with ATEX and full-voltage flexibility
The 3RW5526-1HA06 is a Siemens soft starter rated for motor starting from 200 V to 690 V, with ATEX and IECEx certification for use in potentially explosive atmospheres. Trip class is selectable between CLASS 10A, 10E (default), 20E, and 30E per IEC 60947-4-2, giving the integrator flexibility to match the starting profile to the load — pump, fan, or conveyor. Torque control, breakaway pulse, and pump ramp down are built in, so the same unit handles high-inertia starts and soft stops without external add-ons.
Fieldbus and diagnostics — what the panel sees
Supports Modbus RTU, Modbus TCP, EtherNet/IP, and PROFIBUS — no gateway needed to talk to a Siemens S7 or third-party controller. Onboard analog output configurable as 4-20 mA or 0-10 V for current or torque feedback to a PLC or drive. Event list, error logbook, and trace function are standard — useful for commissioning and fault analysis without a separate software tool.
Mounting and clearance — panel layout constraints
Dimensions are 306 mm high, 185 mm wide, 203 mm deep — fits a standard 400 mm deep enclosure with room for cabling. Required clearances: 100 mm above, 75 mm below, 5 mm at the sides, 10 mm forward, 0 mm backward — plan the DIN rail and ventilation accordingly.
Compliance and approvals — global install base
Carries CE, UL, and CSA approvals — accepted across Europe, North America, and Canada without additional certification effort. ATEX and IECEx marks mean it can be wired into Zone 1 or Zone 2 motor circuits when paired with the correct upstream protection.
