Product Description:

The PSI62C0.772-W1 is a medium-frequency inverter produced by Bosch Rexroth Indramat for the PSI Frequency Inverters series. It converts three-phase mains power into controlled medium-frequency power that drives resistance-welding transformers and similar loads in automated production cells. By controlling current pulses and squeeze intervals, the inverter supplies repeatable energy to each weld point and synchronizes with robot or PLC command structures.

For installation on factory power networks, the inverter accepts an input between 400 and 480 VAC, while its logic and sensing circuits draw from a separate 24 VDC supply. Thermal management relies on a water-cooled baseplate, eliminating dependence on cabinet airflow during continuous operation. Weld current is commanded in increments of 10 A, and because setpoints are referenced in kA, the drive can deliver large pulse amplitudes without sacrificing numerical precision. Communication with higher-level controllers occurs over PROFIBUS, which carries start signals, quality metrics, and fault data. The internal sequencer can generate up to nine impulses per cycle. It also applies a weld time count of three, allowing multi-pulse schedules to operate without external timing relays.

Process parameters reside in buffered RAM that stores up to 256 programs, allowing operators to switch jobs without reentering data during operation. An Ethernet timer block provides a minimum squeeze period of 16 ms before current flow, preventing electrode movement from degrading joint quality. The housing has an IP20 protection rating, so the device should be installed inside an enclosure and protected from water exposure. All control wiring terminates at the X1 interface through a 9-pin D-Sub connector, providing a single connection point for the associated control conductors. This connector arrangement keeps the control wiring organized and reduces the number of separate interfaces required at the inverter.