PSI6100.331-L2 Bosch Rexroth Indramat
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The Bosch Rexroth Indramat PSI6100.331-L2 is a medium frequency inverter from the PSI Frequency Inverters series. It is air cooled, has a weight of approximately 21 kilograms, and offers a degree of protection rated at IP20. The unit supports a mains voltage of 480 to 690 VAC, a frequency of 50 or 60 Hz, and includes an integrated power supply with a 24 VDC output voltage and maximum 2 A output current.
Internal Product Review
The PSI6100.331-L2 is a Bosch Rexroth Indramat medium frequency inverter designed for 480 to 690 VAC mains input. Air-cooled construction and IP20 protection make the unit a strong fit for controlled industrial cabinet installations. A well-executed inverter choice for medium-frequency applications requiring stable power conversion.
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Product Description:
The PSI6100.331-L2 medium-frequency inverter is manufactured by Bosch Rexroth Indramat and supplied within the PSI Frequency Inverters series. It converts three-phase high-voltage mains power into a controlled medium-frequency output for induction heating, welding, or other processes that require adjustable power at higher carrier frequencies. In an automation cell, the unit functions as the power stage between the plant controller and the resonant load, enabling rapid energy modulation without mechanical switching components.
Designed for heavy-duty plant networks, the inverter accepts a three-phase supply from 480–690 VAC grids operating at 50 or 60 Hz. This wide input range allows it to connect directly to European or North American high-voltage distribution systems without an autotransformer. The electronic assemblies are housed inside an IP20 enclosure, so the device must be mounted in a ventilated cabinet while remaining protected against finger contact and medium-sized debris. Heat is removed through an air-cooled channel, and the fully loaded power section dissipates up to 360 W that must be removed by cabinet airflow. An INTERBUS timer interface allows cycle-synchronous triggering from the master controller, supporting precise coordination with automated process sequences.
The converter integrates a 24 V auxiliary rail that supplies drives, relays, or fieldbus nodes with a stabilized output of 24 VDC at up to 2 A, eliminating the need for a separate control power module. The unit meets the 3K3 climatic category and supports continuous operation at ambient temperatures from +10 to +55 °C in production areas with moderate relative humidity. During long-term storage or shipment, the electronics can withstand temperatures from −25 to +70 °C without performance drift. The unit weighs 21 kg, allowing it to be repositioned with suitable handling methods while retaining a rigid mechanical frame. Its cabinet installation must provide enough ventilation and clearance to maintain effective airflow around the power electronics during sustained operation.
