PSI63C0.731-W2 Bosch Rexroth Indramat
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The Bosch Rexroth Indramat PSI63C0.731-W2 is a medium frequency inverter from the PSI Frequency Inverters series, featuring a TriCore CPU and EtherNet/IP communication protocol. This water-cooled unit operates at a mains voltage range of 480 to 690 VAC with a maximum primary current of 800 A, and has a degree of protection rated at IP20. It weighs approximately 25 kg and supports operation within a temperature range of +10 to +55 degrees Celsius.
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Product Description:
The PSI63C0.731-W2 is a medium-frequency inverter produced by Bosch Rexroth Indramat as part of the PSI Frequency Inverters series. The device converts high-voltage three-phase mains power into regulated medium-frequency power for induction heating, welding generators, and other automated processes that need tightly controlled energy. By supplying both the main conversion stage and an internal control supply, the unit supports compact cabinet layouts in industrial automation cells.
Incoming utility voltage may span 480–690 VAC, and the control circuit synchronizes automatically with 50 or 60 Hz mains power, allowing use with either frequency without hardware changes. Heat produced by power semiconductors is removed through a water-cooled plate, so enclosure air remains clean and the ambient temperature rise is limited. The housing meets an IP20 protection level, which prevents accidental finger contact with live parts but requires placement inside a switchgear cabinet for protection from dust or liquids. A built-in auxiliary source provides 24 VDC for sensors, relays, and fieldbus electronics, reducing external wiring. Climatic class 3K3, in accordance with EN 60721-3-3, establishes permissible humidity, vibration, and altitude conditions for standard workshop environments.
The integrated supply can deliver up to 2 A, providing sufficient current for multiple digital inputs and the Ethernet timer functions assigned to this model. During continuous duty, the cooling circuit must dissipate a maximum of 420 W, a value used to size the heat exchanger and establish the required coolant flow rate. Reliable operation is maintained within an ambient temperature range of +10 to +55 °C, while storage and transport are permitted from -25 to +70 °C. The steel chassis weighs 25 kg, and vertical mounting promotes stable coolant circulation through the internal channels. Adequate cabinet clearance should be maintained around the chassis to support cable routing and access to the coolant connections without obstructing adjacent equipment.
