PSI64C0.781-W1 Bosch Rexroth Indramat
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The Bosch Rexroth Indramat PSI64C0.781-W1 is a medium frequency inverter from the PSI Frequency Inverters series. It features water cooling, operates at a mains voltage of 400 to 480 VAC with 50 or 60 Hz frequency, and has IP20 protection. The unit provides a 24 VDC integrated power supply with a maximum output current of 2 Amps and weighs approximately 25 kilograms.
Internal Product Review
The PSI64C0.781-W1 is a Bosch Rexroth Indramat medium frequency inverter with water-cooled thermal management and a 400 to 480 VAC input range. IP20 protection and a 3K3 climatic classification make this unit a dependable choice for controlled industrial installations. Water-cooled operation stands out as a strong advantage for sustained performance in demanding drive applications.
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Product Description:
The PSI64C0.781-W1 is a medium-frequency inverter supplied by Bosch Rexroth Indramat within the PSI Frequency Inverters series. It generates adjustable medium-frequency power from a three-phase supply, allowing heating coils, resonant converters, or specialized tooling to operate at the precise energy level requested by an automation controller. An integrated 24 VDC auxiliary output powers sensors and control boards. Water-cooling channels remove heat from the IGBT stack, enabling compact cabinet layouts in production environments.
The inverter accepts a three-phase mains input of 400–480 VAC, so it interfaces directly with standard industrial distribution panels without an external transformer. A line frequency of 50 or 60 Hz is supported, permitting operation with either common industrial frequency. Thermal regulation relies on a water-cooled plate, and up to 420 W of cooling losses are carried away by the coolant stream to prevent semiconductor derating. For control logic and field devices, the integrated supply delivers 24 VDC, isolating low-voltage electronics from the power stage. The 3K3 classification under EN 60721-3-3 permits operation in clean, lightly heated production halls with limited moisture and dust.
The auxiliary rail can supply up to 2 A, providing power for encoders, contactors, or small PLC modules installed near the drive. Its housing has an IP20 protection rating, so the inverter must be mounted inside a control enclosure to prevent direct contact with internal components. Continuous operation is permitted from +10 to +55 °C, while storage temperatures can range from −25 to +70 °C during warehousing or transportation. An EtherNet timer supports synchronization with higher-level motion controllers and diagnostic stations. Despite its liquid-cooling components, the unit weighs 25 kg, which helps limit the load placed on a backplane or slide-in rack during installation. The mounting surface must provide adequate structural support and sufficient clearance for coolant connections, power wiring, and control cables.
