What this reversing starter delivers for a motor branch
The Siemens 3RA6500-2AB43 is a SIRIUS compact reversing starter — a single device that combines two contactors and a motor protection relay in one 90 mm wide package, saving panel space over a discrete reversing contactor plus overload setup. Rated for continuous operation per IEC 60947-6-2, it handles reversing duty for motors up to 0.09 kW at AC-3 400 V, with a breaking capacity of 53 kA at 400 V — enough to clear high-fault-current branches without cascading upstream. The trip class is adjustable between CLASS 10 and CLASS 20, so the same starter can be set for a faster trip on a pump (CLASS 10) or a slower trip on a high-inertia fan (CLASS 20) without swapping the overload block.
IO-Link integration and control voltage
Built-in IO-Link protocol at COM2 (38.4 kBaud) gives the PLC direct access to the starter's status, current draw, and trip history — no separate digital inputs needed for feedback. The coil is 24 V DC only (24... 24 V), so the control transformer must supply DC; an AC coil variant is not available on this order code. Five on-board LEDs indicate operating state, fault, and IO-Link communication — useful for commissioning without a handheld tool.
Mounting and environmental limits for panel integration
Mounts via screw and snap-on to a standard mounting rail; the manufacturer recommends vertical orientation on a horizontal rail for optimal heat dissipation. Dimensions are 90 mm wide, 191 mm tall, 165 mm deep — fits a standard 200 mm deep enclosure with room for wiring ducts. Operating temperature range is -20 to +60 °C, with storage and transport limits of -55 to +80 °C; pollution degree 3 means it tolerates conductive dust in industrial environments. Main circuit connection uses plug-in terminals without screw clamps — solid wire from 0.25 to 1.5 mm² is accepted, so pre-fabricated ferruled leads are recommended for stranded wire.