Product Description:

The SM 15/30-TC1 inverter is produced by Bosch Rexroth Indramat for vector and V/Hz control within the SM AC Inverters series. It converts the fixed energy of a common DC bus into a variable AC output so automated cells can regulate motor speed, torque, and direction with analog references and internal diagnostics. Installed in a control cabinet, the unit connects to motion controllers through differential voltage commands and presents operating status on its front panel. This arrangement suits machinery that requires adjustable motor speed and consistent response during normal process changes.

The power stage has a rated current of 15 A, allowing it to supply steady mechanical load without overheating during continuous operation. For acceleration spikes, the drive tolerates a peak current of 30 A, giving extra torque for a brief interval before returning to nominal operation. The internal bridge is energized from a DC bus of 520 VDC, which supports modulation for 400 V-class induction or synchronous machines. Control electronics are maintained by a separate 24 V supply, so status monitoring and fault handling can remain available even when the main link is down. Thermal management includes a heat-sink alarm that triggers at 80 °C, providing time for the supervisory PLC to reduce load or increase airflow before shutdown.

Low-power sensors receive excitation from the auxiliary rails at ±15 V, and real-time messages appear on a seven-segment display that shows coded faults during operation. Motor winding integrity is protected by a trip level of 145 °C. After the condition clears, the control logic imposes a mandatory 2 s reset delay to prevent rapid thermal cycling and repeated restart attempts. An 8 V level corresponds to Imax on both the actual and command current channels, while a 10 V reference corresponds to maximum speed. Cable shields terminate on a dedicated Faston lug, which helps keep high-frequency noise away from signal ground and supports stable analog signaling.