PSI64C0.789-W1 Bosch Rexroth Indramat
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The Bosch Rexroth Indramat PSI64C0.789-W1 is a medium frequency inverter from the PSI Frequency Inverters series, featuring water cooling and cabinet losses of 210 watts. It supports a mains voltage of 400 to 480 VAC, has a nominal current of 220 amps, and uses a PROFINET network interface. The device's dimensions are 288 by 653 by 280 millimeters, and it offers 26 discrete input bits, 19 discrete output bits, and 128 serial I/O bits.
Internal Product Review
The PSI64C0.789-W1 is a medium frequency inverter with water-cooled thermal management for efficient heat control. PROFINET connectivity and a 400 to 480 VAC mains range support smooth integration into high-capacity automation systems. A 54 kA max secondary current paired with a 1000 Hz sequence rate makes the inverter a strong performer for fast, high-output duty.
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Product Description:
The PSI64C0.789-W1 inverter is produced by Bosch Rexroth Indramat within the PSI Frequency Inverters series. It is a medium-frequency inverter that converts three-phase mains power into controlled high-frequency output for inductive processes and other automation tasks. By placing the power electronics in a separate cabinet, the unit supplies stable current to resonant loads and connects directly to Ethernet-based machine control. This layout supports applications that require repeatable pulse control and dependable coordination with surrounding equipment.
The inverter operates on a mains supply of 400 - 480 VAC, which allows connection to common industrial power systems. Under rated load, it draws 220 A, and the chopper can momentarily pass 1600 A on the primary side to support steep current ramps. The medium-frequency transformer on the secondary side delivers peaks of 54 kA, which suits short welding pulses and other brief high-current demands. Cycle control runs at 1000 Hz, which sets the maximum number of impulses per second. Interface resources include 26 discrete inputs, 19 discrete outputs, 24 point-addressable inputs, and 128 serial bits, all exchanged over PROFINET with an EtherNet timer through module E/A_DISKR2ED.
Thermal management relies on a water-cooled heat sink that can remove up to 700 W of switching losses, while cabinet dissipation stays at 210 W. This helps limit heat buildup inside the enclosure during operation. A minimum coolant flow of 4 l/min must be maintained to keep semiconductor junction temperatures within limits. Installation wiring requires conductors of at least 95 mm² to match the inverter's current demand and the 10-electrode output topology. The enclosure measures 288 × 653 × 280 mm, allowing the unit to fit into standard 600 mm deep panels without overhang.
