Product Description:

The PSI63C0.710-L2 is manufactured by Bosch Rexroth Indramat and belongs to the PSI Frequency Inverters series. It is a medium-frequency inverter designed to supply controlled welding current to resistance-welding guns and similar automated stations. By converting high-voltage three-phase mains power into a regulated medium-frequency output, the unit allows production cells to maintain consistent heat profiles and cycle times while fitting inside standard control enclosures.

This inverter accepts a mains voltage range of 480–690 VAC and converts it to a primary voltage that operates at 1 kHz. An internal air path provides an air-cooled design that removes heat generated during operation. The housing has an IP20 protection rating, making it suitable for cabinet mounting in clean electrical rooms, and the power terminals accommodate conductors with a minimum cross-section of 35 mm². For weld control, the device drives up to 32 electrodes and requires a minimum preweld or squeeze time of 16 ms. MOV-based overvoltage protection limits transient spikes, while cabinet power loss is 100 W during idle operation. Logic outputs deliver 24 VDC at a continuous current of 2 A, and three auxiliary outputs supplement five digital inputs for process sequencing.

Because the inverter itself is rated IP20, the surrounding installation area must provide IP54 protection where splash or dust exposure may occur. Spot selection is handled over a 24-bit field that identifies each weld contour individually. At full duty, the cabinet must dissipate up to 200 W while maintaining conductor temperatures within acceptable limits. A stop circuit rated for 24 VDC at 3 A removes power from the welding-gun solenoids when activated. Timing coordination with robots or PLCs is handled through an EtherNet timer interface, allowing weld sequences to remain synchronized with automated machine movements and process commands.