SIMATIC motor starter for direct-on-line control
The Siemens 3RK1301-1EB00-0AA2 is a SIMATIC-branded motor starter configured as a direct starter — meaning it switches the motor directly across the line without a reversing contactor. It is designed for pluggable mounting on a terminal module, so the field wiring stays in the cabinet while the control module swaps out for service. Rated supply is 24 V DC (20.4 to 28.8 V permissible range), and it carries both PROFINET and PROFIBUS DP protocol support — so it slots into either a Siemens S7 controller network or a mixed-fieldbus architecture without a gateway.
Trip class, fault current, and duty cycle limits
Maximum operating frequency is 750 operations per hour — a hard ceiling for high-cycling applications like conveyor indexing or pump sequencing. Above that the thermal memory in the overload element does not reset between starts.
Fieldbus and I/O mapping
The 3RK1301-1EB00-0AA2 allocates 1 byte each for inputs and outputs on the fieldbus — enough for start/stop, fault feedback, and a few status bits. Digital I/O are not onboard; they are handled through a separate control module (the terminal block on the base unit accepts screw-type terminations for the main power infeed). Mounting position is vertical or horizontal, and the unit is rated for 5 g shock at 11 ms and 2 g vibration — typical for cabinet-mounted gear in a panel near a conveyor line or pump skid.