PSI63C0.739-W1 Bosch Rexroth Indramat
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The Bosch Rexroth Indramat PSI63C0.739-W1 is a medium frequency inverter from the PSI Frequency Inverters series and weighs 25 kilograms. It uses a water cooled system with a minimum water flow of 4 liters per minute and can handle a maximum water pressure of 10 bar. The inverter operates at a mains voltage of 400 to 480 VAC and features an Ethernet PROFINET I/O connection.
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Product Description:
The PSI63C0.739-W1 is a water-cooled frequency inverter produced by Bosch Rexroth Indramat for the PSI Frequency Inverters series. Intended for medium-frequency induction duties in automated lines, it converts factory mains into regulated high-current outputs for coils and transformers. The unit mounts inside IP20 enclosures and links to plant controllers through an Ethernet (PROFINET) interface, allowing cycle-synchronized commands and status reporting while simplifying panel layout for heat-treat furnaces, welding stations, and similar installations. This arrangement supports coordinated operation where power delivery must track machine sequences closely and where stable communication with the control system is required during repeated production cycles.
At nominal conditions, the inverter draws 110 A from a three-phase 400-480 VAC supply and dissipates only 69 W of basic cabinet loss, rising to 110 W when it runs at maximum duty. A liquid heat sink removes that load, so forced-air ducts are unnecessary. Control tasks are handled by a TriCore CPU, and timing functions follow the EtherNet timer channel to stay aligned with the factory network. A 24 VDC auxiliary bus supplies 2 A to the DSP, display, and I/O boards. On the power side, the primary circuit can reach 800 A, while the secondary output is rated for 36 kA to satisfy the high current peaks demanded by inductive loads. All electronics remain isolated behind a finger-safe barrier, which helps protect internal sections while the unit is installed in compact industrial cabinets.
Liquid parameters govern continuous service. The exchanger admits coolant up to 10 bar and must see a minimum flow of 4 l/min to keep semiconductor junctions below threshold. Under that flow, the differential is only 0.1 bar, so return lines can stay low pressure. Total mass is 25 kg, which keeps handling manageable during cabinet integration. Because water carries heat directly out of the chassis, hot spots inside the enclosure are reduced and nearby automation components are less affected by thermal buildup during extended operation.
