PSI6100.421-W1 Bosch Rexroth Indramat
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The Bosch Rexroth Indramat PSI6100.421-W1 is a medium frequency inverter from the PSI Frequency Inverters series. It operates with a mains voltage of 400 to 480 VAC and a nominal current of 110 Amps, featuring a water cooled method and IP20 protection rating. The inverter supports a minimum water flow of 4 liters per minute and is equipped with an RS232 I/O board.
Internal Product Review
The PSI6100.421-W1 is a medium frequency inverter with water-cooled construction and a 400 to 480 VAC mains rating. A 1000 Hz sequence frequency and 256-program capacity give the unit excellent control flexibility for repetitive industrial processes. IP20 protection completes a well-executed design focused on stable industrial performance.
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Product Description:
The PSI6100.421-W1 is a medium-frequency inverter engineered by Bosch Rexroth Indramat for the PSI Frequency Inverters series. Within automated heat-treatment lines, it converts the facility’s three-phase utility power into a regulated medium-frequency output that drives induction transformers and coils. By doing so, the unit supplies precisely timed current pulses to workpieces, allowing process controllers to reach target temperatures quickly while keeping energy input within the narrow limits demanded by modern industrial automation sequences.
Nominal operation requires a three-phase input of 400 – 480 VAC, and the converter draws up to 110 A from that line. Internally, the control electronics are powered from a 24 VDC auxiliary bus limited to 2 A, while an isolated stop channel can interrupt a 24 VDC / 3 A safety loop. The inverter sequences its bridge at 1000 Hz, giving fine resolution when matching power to different coil impedances. Heat generated by the switching devices is removed through a water-cooled plate; under worst-case load, the coolant must extract 360 W and maintain at least 4 l/min. Field wiring enters through clamp blocks sized for 35 mm² conductors, and a 50 mm² terminal pair connects the DC link. Parameter entry and fault logging are handled through an RS-232 I/O board.
The inverter’s primary stage can carry 400 A, translating to a secondary pulse capability of 20 kA when matched with suitable transformers. Up to 256 stored programs let operators switch recipes without reloading parameters. Cabinet dissipation is limited to 110 W, so once the liquid cooler removes the switching losses, only modest airflow is needed inside the panel. With the specified coolant rate, the pressure drop remains below 0.1 bar, keeping pump demand low. Installed behind protective covers, the housing provides an IP20 rating for finger-safe operation.
