Product Description:

The PSI64C0.728-W1 belongs to the PSI Frequency Inverters series manufactured by Bosch Rexroth Indramat. As a medium-frequency inverter, it conditions three-phase power for induction heating, welding, and similar automation tasks that need precise energy delivery at elevated carrier frequencies. Within an installation, the unit bridges the incoming supply and the load coil while the controller monitors current and voltage feedback to maintain stable output.

This inverter accepts a supply of 400 - 480 VAC and removes internally generated heat through a water-cooled circuit that must be connected to the plant chiller line. Both the mains and transformer conductors can be wired with up to 95 mm² cable, allowing low-loss links to upstream switchgear. The inverter uses a sequence standard of 1000 Hz as the nominal intermediate-frequency waveform for process power. The unit is prepared for fieldbus communication, offering 208 serial fieldbus input bits and 144 output bits arranged as 13 input words and 9 output words for deterministic cyclic exchange. Secondary current feedback supports closed-loop regulation, secondary voltage feedback helps protect against overvoltage events, analog pressure input and output channels can synchronize clamps with the heating profile, and initial dressing can precondition the workpiece before the main cycle starts.

A dedicated stop circuit is rated at 24 VDC and can switch up to 3 A, enabling fast quenching of the load when an interlock is triggered. Timing of production phases is handled by an Ethernet-based timer object, allowing the inverter to align with PLC sequences without extra hardware counters. Because serial traffic is separated from the analog pressure loop, motion commands and process data do not interfere with each other, and the prepared fieldbus interface can be activated later without rewiring the power terminals.