Product Description:

The SM 17/35-T is an AC inverter module manufactured by Bosch Rexroth Indramat as part of the SM AC Inverters series. Designed for closed-loop speed control of induction or synchronous motors, the unit converts fixed-frequency mains power into a variable output that automation equipment can match to process demands. Integrated tacho feedback and a built-in blower allow the inverter to maintain motor speed stability during continuous duty, making it suitable for material handling lines, packaging cells, and similar industrial motion tasks. Its open-frame design simplifies integration into ventilated control cabinets.

The power stage delivers a continuous output of 17 A and tolerates surges up to 35 A during acceleration events. Speed demand is introduced through a differential command channel that accepts ±10 V, and the internal amplifier is fixed at a 1:1 ratio so the reference voltage maps directly to output frequency. The drive becomes active when a +24 V enable line is present, and its ready relay can switch 24 V DC at 1 A to inform higher-level controls. A tacho feedback signal of ±2.7 V per 1000 rpm provides actual speed data. All electronics are air cooled and carry a protection rating of IP00, so installation inside a cabinet is mandatory. Thermal operation remains stable up to +55 °C ambient.

The inverter uses one axial blower mounted on the heatsink, and the fan is supplied with 24 V DC from the control supply. Internal control logic requires only 22 W, while dissipation from switching devices can reach 150 W under worst-case load, so unobstructed airflow is required. The regulation loop achieves a speed span greater than 1:10,000, supporting both low-speed torque and high-speed throughput without parameter changes. Operation is permitted up to 1000 m AMSL, and storage is allowed up to 70 °C when the plant is idle.