Product Description:

The PSI6100.203-L1 is a medium-frequency inverter manufactured by Bosch Rexroth Indramat as part of the PSI Frequency Inverters series. As a converter, it supplies controlled medium-frequency power to industrial machines that need precise energy regulation for heating, welding, or motion applications. This unit accepts three-phase mains, processes the incoming power through internal power electronics, and presents a modulated output that downstream equipment can track in real time.

The inverter relies on an air-cooled thermal design, so ambient airflow removes switching and conduction losses without liquid circuits. Control logic is powered from a dedicated 24 VDC rail, keeping the CPU and I/O stable even when the power stage is de-energized. The input section handles a mains window of 400 – 480 VAC at a nominal draw of 110 A, which accommodates common 50 Hz or 60 Hz factory supplies while staying within feeder ratings. The housing is rated IP20, which protects against finger contact but requires installation inside a switchgear cabinet. Discrete 24 V control terminals simplify start, stop, and fault signaling, and an internal 2 A source can drive external relays. A standard CPU supervises a 1 kHz PWM primary waveform that shapes output voltage, and conductors of at least 35 mm² are required to keep temperature rise within limits.

On the converter side, the power stage can deliver up to 400 A of primary current, while the secondary circuit withstands fault currents as high as 20 kA without catastrophic damage. Surge energy is absorbed by an integrated MOV network, preventing component overstress during line disturbances. The programming port is a Sub-D 9-pole male connector that exchanges parameters at 19200 bit/s, and its PROFIBUS timer function lets the inverter synchronize with higher-level controllers. Electrical clearance supports a maximum phase-to-ground potential of 480 VAC, and the discrete interface matches the internal output profile, allowing consistent coordination between protective electronics and field wiring.