SIMATIC reversing motor starter for PROFINET lines
The Siemens SIMATIC 3RK1301-1GB00-1AA2 is a reversing motor starter in the SIMATIC product brand, designed for motor control applications requiring forward and reverse starting. It is a reversing starter design, meaning it integrates two contactors with mechanical interlock for direction change without external wiring. Rated Trip Class CLASS 10, it provides overcurrent protection that trips within 10 seconds at 7.2× rated current, matching standard IEC 60947-4-1 thermal overload curves for motor starting. The 50 kA rated short-circuit current at 400 V gives fault-clearing capacity for high-fault installations.
Fieldbus and integration constraints
This starter carries both PROFINET protocol and PROFIBUS DP protocol onboard, so it drops into either a PROFINET RT or PROFIBUS DP network without an additional gateway module. The I/O assignment is 1 byte of inputs and 1 byte of outputs, which maps to a compact data block in the controller. Mounting is pluggable on a terminal module, meaning the power and bus connections stay on the backplane while the control module swaps out. Fastening method is pluggable on terminal module, so panel rewiring is not required when replacing the electronics module. The unit fits a 90 mm wide, 265 mm high, 120 mm deep footprint.
Shock resistance is 5 g for 11 ms, vibration resistance is 2 g. Pollution degree is rated 3 at 400 V and 2 at 500 V per IEC 60664 / IEC 61131, so it handles industrial atmospheres with conductive dust or condensation. Supply voltage is 24 V DC nominal, with permissible range 20.4 to 28.8 V DC. Maximum operating frequency is 750 operations per hour. Power dissipation with bypass circuit is 4.1184 W, without bypass circuit is 4.118 W.
The SIMATIC motor starter family is broadly stocked, but this reversing variant with dual-fieldbus support may require a lead-time check for quantity commitments.