PSI65C0.761-W1 Bosch Rexroth Indramat
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The Bosch Rexroth Indramat PSI65C0.761-W1 is a medium frequency inverter from the PSI Frequency Inverters series. It features water cooling, a protection rating of IP20, and operates at a mains voltage of 400 to 480 VAC with a frequency of either 50 or 60 Hz. The integrated power supply unit provides a maximum output current of 2 amps at 24 VDC, and the product weighs approximately 25 kilograms.
Internal Product Review
The PSI65C0.761-W1 is a medium frequency inverter with water-cooled operation suited to consistent thermal performance. An integrated 24 VDC power supply rated to 2 A supports clean auxiliary power distribution. EtherNet timer capability and IP20 protection make the unit a strong fit for controlled industrial installations.
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Product Description:
The PSI65C0.761-W1 is a water-cooled medium-frequency inverter produced by Bosch Rexroth Indramat within the PSI Frequency Inverters series. Designed for machine tools, induction heating sources, and other equipment that needs adjustable medium-frequency power, the unit converts three-phase mains power into a regulated output that can be modulated by a higher-level controller. Its integrated Ethernet timer interface permits synchronized triggering with PLC cycle times, allowing the inverter to fit directly into distributed automation sequences.
Mains-side compatibility is broad: the inverter accepts 400–480 VAC from industrial power systems and operates at line frequencies of 50/60 Hz. An internal auxiliary supply delivers 24 VDC at up to 2 A, so contactors, sensors, or fieldbus gateways can be powered without an external supply. The electronics are protected by an IP20 housing, making cabinet installation mandatory while allowing convenient access to wiring. Liquid channels in the baseplate extract heat from the power electronics. This water-cooling system keeps semiconductor junctions within safe limits during continuous full-current switching, while the Ethernet timer maintains cycle accuracy.
The inverter operates between +10 to +55 °C and can be stored from -25 to +70 °C. Under nominal loading, the cooling circuit must remove 420 W of thermal loss, which provides a basis for chiller sizing and flow-rate calculations. The 3K3 climatic category under EN 60721-3-3 sets the allowable humidity and dust levels for the operating temperature range. Total mass is approximately 25 kg, allowing the unit to be shelf-mounted or attached to slide rails. The mounting structure must support the inverter securely and leave sufficient clearance for coolant lines, electrical connections, and cabinet ventilation. Proper coolant flow is required to carry heat away from the baseplate during sustained operation.
