PSI61C0.739-L1 Bosch Rexroth Indramat
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The Bosch Rexroth Indramat PSI61C0.739-L1 is a medium frequency inverter from the PSI Frequency Inverters series with an IP20 degree of protection. It operates at a mains voltage of 400 to 480 VAC and a mains frequency of 50 or 60 Hz, and is air cooled with a maximum cooling loss of 360 W. This inverter has an integrated power supply unit that delivers 24 VDC at up to 2 A and weighs approximately 20 kilograms.
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Product Description:
The PSI61C0.739-L1 inverter is manufactured by Bosch Rexroth Indramat within the PSI Frequency Inverters series. It is a medium-frequency power converter that modulates the AC supplied to machine spindles, induction heaters, or other loads requiring variable electrical output in automated production cells. By converting fixed utility power into a programmatically adjustable waveform, the unit allows speed, power, and thermal profiles to be controlled from a central motion controller. This functionality supports processes that require coordinated electrical output rather than a fixed supply waveform.
The inverter connects to three-phase utility lines rated at 400–480 VAC and accepts mains frequencies of 50 or 60 Hz, allowing installation in European or North American facilities without additional transformers. The enclosure provides IP20 protection for use in touch-safe control cabinets, while an air-cooled channel removes heat generated by semiconductor switching. An integrated auxiliary supply delivers 24 VDC control power with a maximum current of 2 A. This output can power contactors, sensors, and relay coils on the same panel without requiring a separate control-power source. Network-based timing tasks are managed by an internal timer configured over an Ethernet connection, eliminating the need for dedicated hardware clocks.
The inverter meets the 3K3 classification of EN 60721-3-3 and tolerates moderate humidity and nonconductive dust commonly found in control rooms. During continuous service, the inverter releases up to 360 W of cooling losses that must be removed by cabinet airflow. Reliable operation is maintained within an ambient temperature range of +10 to +55 °C, while unpowered storage is permitted from -25 to +70 °C under noncondensing conditions. The permitted storage range helps protect internal electronic components when the unit is held in an unconditioned facility. Despite its 16 kVA-class capability, the assembly weighs 20 kg, which reduces the structural load placed on the cabinet mounting surface.
