Product Description:

The PSI6100.420-L1 is a medium-frequency inverter produced by Bosch Rexroth Indramat for the PSI Frequency Inverters series. As a power conversion stage, it drives induction heating and other process loads by translating mains energy into controlled medium-frequency output for coils or transformers within an automation cell. The unit links the plant supply to the connected tools under a higher-level controller, allowing the system to regulate energy delivery while the inverter maintains current, temperature, and protection limits. Its role is to provide stable power conversion where repeatable heating performance and coordinated machine control are required.

Electrically, the inverter accepts a three-phase supply of 400 – 480 VAC, delivers 400 A at full load, and provides 110 A continuously. A surge path protected by MOV devices clamps line spikes, and a 24 VDC / 3 A stop circuit forms the emergency interlock. The PSG 3100 path supports a peak secondary current of 20 kA for rapid magnetic buildup. Cooling is air based, and the enclosure meets IP20, which provides finger-safe openings without dust sealing. The converter remains in service until the heat sink reaches 55 °C. No discrete I/O points are fitted, so commands and diagnostic data travel through an RS-232 board together with digital pressure feedback and an analog pressure output channel.

During operation, loss figures affect the amount of ventilation needed in the control cabinet. Under nominal service, the electronics dissipate 69 W of basic loss, and forced airflow must also remove up to 360 W when the system cycles at maximum rating. Switching devices operate at 1 kHz, which balances output control with power-stage heating during continuous use. Power terminals accept conductors up to 50 mm², allowing short bus runs to carry high current with reduced voltage drop. This arrangement suits compact cabinet layouts where the inverter, supply connections, and load cabling share limited space.