KSM02.1B-061C-35N-M3-HP2-ET-L3-D7-NN-FW by Bosch Rexroth Indramat

The KSM02.1B-061C-35N-M3-HP2-ET-L3-D7-NN-FW is a motor-integrated servo drive manufactured by Bosch Rexroth Indramat for the KSM Motor Integrated Servo Drives series. This Series 2 unit combines a synchronous motor, inverter electronics, and a fieldbus interface, allowing decentralized installation on machines. Classified at the Basic performance level, the device uses motor size 061 with length code C to fit narrow axes while supplying the required torque. It is intended for distributed motion applications such as conveyors, pick-and-place heads, and compact handling modules where cabinet space and wiring complexity must be reduced.

The power section operates from a nominal bus voltage of DC 750 V, so only a high-voltage supply line is needed. Electrical power, feedback, brake, and network signals are combined in a single hybrid connector, reducing the number of separate connections. Thermal losses are removed through natural convection, and no fan is required in the sealed housing. The unit has the standard design option and design version 1, while its internal winding code 35 matches the integrated inverter to the motor's electrical characteristics. Position feedback is provided by a Hiperface encoder that outputs 16 signal periods per mechanical revolution and provides multi-turn absolute position data. Torque is transmitted through a shaft with a keyway, and a shaft seal prevents coolant or dust from reaching the front bearing. The electrically released holding brake clamps the shaft when its power supply is removed.

Control connectivity is handled by Multi-Ethernet, enabling real-time communication with SERCOS III, EtherNet/IP, PROFINET, and other Ethernet-based control systems through the same port. The brake coil requires DC 24 V, allowing compatible control circuitry to energize it directly. Functional safety is provided through Safe Torque Off (STO), which interrupts torque-producing drive output without resetting the stored encoder position. Rotor position is measured using a capacitive sensing principle that tolerates oil mist and vibration better than an optical disc. Absolute position information remains available after a power cycle, reducing the need for a new reference movement before operation resumes. This capability supports distributed robotic axes that require controlled load holding and rapid recovery after an interruption.