PSI63C0.725-L2 Bosch Rexroth Indramat
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The Bosch Rexroth Indramat PSI63C0.725-L2 is a medium frequency inverter from the PSI Frequency Inverters series. It uses a TriCore CPU, operates with a mains voltage of 480 to 690 VAC at 50 or 60 Hz, and features a pulse-width modulated primary output at 1 kHz. This inverter has an IP20 protection rating, an air cooled cooling method, and supports Ethernet I/O connections.
Internal Product Review
The PSI63C0.725-L2 is a medium frequency inverter with pulse-width modulated output for clean control performance. Air-cooled construction and Ethernet I/O support make integration straightforward and position the inverter as an excellent fit for modern industrial systems.
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Product Description:
The PSI63C0.725-L2 is produced by Bosch Rexroth Indramat as part of the PSI Frequency Inverters series. Classified as a medium-frequency inverter, it connects three-phase plant power to equipment such as induction heaters or high-speed spindle drives that require finely regulated AC power at elevated frequencies. In an automation line, the unit provides variable power while maintaining separation between the incoming mains and the sensitive control architecture. Its regulated output supports applications that require rapid and accurate adjustments in response to changing operating conditions.
The mains terminals accept line-to-line potentials from 480 to 690 VAC and accommodate utility frequencies of 50/60 Hz. Compatibility with TN, TT, and IT grounding systems allows the inverter to operate with several common power distribution arrangements. The power stage delivers a pulse-width-modulated output at a factory-tuned carrier frequency of 1 kHz, supporting precise current shaping for medium-frequency loads. An MOV network suppresses overvoltage events that could otherwise affect the power electronics. The integrated 24 VDC auxiliary rail supplies up to 2 A for field sensors or contactors. Control and diagnostic data travel through an Ethernet I/O port, and the same communication bus supports a timer function for synchronized triggering of external devices.
Basic inverter heat dissipation is 100 W and can peak at 200 W under worst-case switching conditions, providing a basis for cabinet airflow planning. The housing has an IP20 rating and uses an air-cooled heat sink, eliminating the need for liquid-cooling circuits. Feed conductors require a minimum cross-sectional area of 35 mm² to keep their temperature rise within the permitted range. A TriCore processor manages pulse-width modulation, MOV monitoring, and Ethernet-based timing for a fast response to load changes. The auxiliary supply limit helps prevent excessive current draw on secondary wiring, while the Ethernet connection provides a direct path for operating data and external timing commands.
