PSI65C0.777-W1 Bosch Rexroth Indramat
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The Bosch Rexroth Indramat PSI65C0.777-W1 is a medium frequency inverter from the PSI Frequency Inverters series and weighs approximately 25 kilograms. It features a water cooled design and operates at a mains voltage of 400 to 480 VAC with a frequency of 50 or 60 Hz. The unit comes with an integrated power supply providing up to 2 Amps at 24 VDC and has an IP20 degree of protection.
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Product Description:
The PSI65C0.777-W1 is a medium-frequency inverter built by Bosch Rexroth Indramat for the PSI Frequency Inverters series. In production cells, it converts three-phase utility power into a controlled medium-frequency output for induction heating, welding, or similar processes that require precise energy delivery. Integrated supervision circuits and a dedicated control supply allow direct coordination with higher-level PLC hardware, making the unit a compact drive solution for automated equipment that must regulate current and thermal profiles in real time. This combination of power conversion and integrated control supports processes in which output timing and current stability directly affect production quality.
The enclosure has a protection rating of IP20, so the electronics are protected against accidental finger contact but require installation inside a cabinet. Heat is removed through a water-cooled plate, allowing dense component placement while limiting excessive temperature increases. The power section accepts a three-phase input of 400 to 480 VAC at a mains frequency of 50 or 60 Hz; this range supports common European and North American utility supplies without transformer adaptation. An integrated auxiliary supply delivers 24 VDC at up to 2 A, providing power for drive logic, contactors, sensors, or fieldbus transceivers without a separate supply. Cabinet placement must also provide suitable access for the water connections and sufficient clearance around the electrical terminals.
The cooling system must dissipate 420 W of thermal loss under full load, which establishes the required flow rate and radiator capacity for the water circuit. The permitted operating ambient temperature ranges from +10 to +55 °C, while storage and transportation are permitted from -25 to +70 °C without performance degradation. The inverter is classified in climatic category 3K3 according to EN 60721-3-3, indicating suitability for moderate indoor conditions with filtered air. A built-in Ethernet-based timer allows user programs to trigger output stages with deterministic delays. The assembly weighs 25 kg, so the cabinet structure and mounting hardware must be able to support the unit securely during operation.
