PSI63C0.789-L2 Bosch Rexroth Indramat
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The Bosch Rexroth Indramat PSI63C0.789-L2 is a medium frequency inverter from the PSI Frequency Inverters series and weighs approximately 21 kilograms. It is air cooled, operates within a temperature range of +10 to +55 degrees Celsius, and is protected to the IP20 standard. The unit supports mains voltages from 480 to 690 VAC with a frequency of 50 or 60 Hz, and has an integrated power supply providing up to 2 Amps at 24 VDC.
Internal Product Review
The PSI63C0.789-L2 is a medium frequency inverter with air-cooled operation for dependable thermal management. Support for 480 to 690 VAC mains voltage and 50 or 60 Hz input gives the inverter strong application flexibility in industrial power systems. IP20 protection and an integrated 24 VDC power supply make the inverter a well-rounded choice for controlled cabinet installations.
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Product Description:
The PSI63C0.789-L2 is a medium-frequency inverter produced by Bosch Rexroth Indramat and included in the PSI Frequency Inverters series. It converts high-voltage mains power into a controlled medium-frequency output that heats, welds, or hardens metallic workpieces, allowing precise energy delivery inside automated manufacturing cells. The device functions as a stand-alone power stage that interfaces with upstream PLCs and downstream resonant circuits through standard field wiring.
The inverter relies on an air-cooled heat exchange path, so the cabinet must provide unobstructed airflow instead of external water circuits. Its housing carries a protection rating of IP20, permitting installation inside an electrical cabinet while still requiring a dust-controlled environment. An integrated auxiliary supply can furnish up to 2 A, and its regulated rail is fixed at 24 VDC for contactors, sensors, or small logic controllers. The power section accepts three-phase feeds from 480–690 VAC, providing compatibility with high-voltage networks in forging or melting facilities. The unit meets climatic category 3K3 requirements for vibration, humidity, and altitude in industrial workshops. A dedicated Ethernet timer channel coordinates firing sequences with external control hardware.
Line synchronization is maintained at 50/60 Hz, so no additional frequency conversion is needed when systems operate in different regions. Internal switching produces up to 360 W of cooling losses that must be removed by control-cabinet fans sized for the recommended airflow. Continuous operation is supported from +10 to +55 °C, while storage is permitted from -25 to +70 °C. These operating and storage limits allow the inverter to remain in controlled industrial facilities or unpowered storage areas within the stated temperature ranges. With a total mass of 21 kg, the inverter requires a mounting structure that can support its weight securely. Adequate clearance around the air path helps the cooling system remove heat without obstructing adjacent cabinet equipment.
