AS-Interface reversing starter for distributed motor control
The Siemens 3RK1322-1GS02-1AA4 is a SIRIUS AS-Interface compact reversing starter designed for distributed motor control in IP65-rated enclosures. It integrates an electromechanical reversing contactor, a bimetal overload relay with a setting range of 4.5 to 6.3 A, and short-circuit protection via circuit-breakers into a single 190 mm deep, 120 mm wide, 270 mm high package. Rated at 2.2 kW at 400 V AC-3, this starter handles reversing motor loads such as conveyors, pumps, and small hoists where space is tight and wiring needs to be minimized. The IP65 rating means the entire assembly is protected against dust ingress and low-pressure water jets — suitable for washdown areas in food-and-bev or packaging lines where a panel-mounted solution would be impractical. Communication runs over AS-Interface (AS-i protocol), not PROFIBUS DP, so this starter is a direct fit for AS-i networks common in material handling and automotive body shops. It includes a motor brake output rated at 500 V DC / 1 A, allowing a holding brake to be controlled directly from the starter without an external relay.
What the ratings mean for fit
The 4.5 to 6.3 A bimetal setting range covers motors drawing roughly 4.5 to 6.3 A full-load at 400 V — typically 1.5 to 2.2 kW four-pole induction motors. The 2.2 kW AC-3 rating at 400 V is the maximum motor power the starter can switch under the inductive load of a squirrel-cage motor during starting and plugging. AC-3 duty is the standard for reversing starters because it accounts for the higher inrush and breaking current of motor starting. Short-circuit breaking capacity is 50,000 A at 400 V (Icu), meaning the starter can safely interrupt a fault current up to that level without catastrophic failure. This SCCR figure is critical for panel builders coordinating with upstream protective devices — it determines whether the starter can be used on a high-fault-capacity supply without additional current-limiting fuses. The operating temperature range of -25 to +55 °C covers most indoor industrial environments and many outdoor installations in temperate climates. The IP65 enclosure means the starter can be mounted directly on a machine frame or conveyor structure without a separate control panel, as long as the cable glands are properly sealed.
Sourcing and lifecycle
The main current circuit connects via tab terminals, which are common for IP65-rated distributed starters — they accept standard quick-connect receptacles or can be crimped to motor cables. The 9-pole motor outgoing feeder and 9-pole power connection are pre-wired from the factory, reducing field wiring time.
Integration notes
At 190 mm deep, 120 mm wide, and 270 mm high, this starter occupies roughly the footprint of a small junction box. It mounts directly to a machine frame or bracket via its IP65 housing — no DIN rail required inside a panel. The two integrated inputs (part of the 9-pole connection) allow limit switches or pushbuttons to be wired directly to the AS-i node, reducing I/O module count. The brake output is rated 500 V DC / 1 A — sized for the solenoid coil of a typical disc brake on a small motor. Verify the brake coil current and voltage against this rating before specifying; the output is not intended for large electromagnetic brakes drawing several amps.