PSI6200.201-W1 Bosch Rexroth Indramat
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The Bosch Rexroth Indramat PSI6200.201-W1 is a medium frequency inverter from the PSI Frequency Inverters series. This unit has a maximum output current of 1200 Amps and uses water cooling with a flow rate of 4 liters per minute. It operates with a mains voltage of 400 to 480 VAC and features a PROFIBUS I/O interface with a local RS232 programming port.
Internal Product Review
The PSI6200.201-W1 is a medium frequency inverter designed for demanding industrial power applications, with a 400 to 480 VAC mains voltage and 220 A nominal system current. Water-cooled construction with 4 l/min cooling water flow supports stable thermal management during continuous duty. PROFIBUS I/O and a 1200 A max output current make this unit an impressive choice for precise, high-power inverter performance.
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Product Description:
The PSI6200.201-W1 is a medium-frequency inverter manufactured by Bosch Rexroth Indramat for the PSI Frequency Inverters series. It serves as the energy converter between a plant’s three-phase supply and the transformer used in automated welding cells, providing regulated medium-frequency power that supports repeatable process quality. The unit mounts inside a machine cabinet and communicates with the controller over a fieldbus connection. This connection allows welding current, timing, and safety interlocks to be coordinated with other machine functions. Its cabinet-mounted design also keeps the power electronics protected within the machine’s electrical enclosure.
During operation, the inverter accepts a line voltage of 400–480 VAC and can deliver a peak output of 1200 A, while its nominal system current is 220 A. Cabinet power loss is limited to 210 W, reducing the amount of heat that the surrounding cabinet ventilation must remove. Internal switching operates at a frequency of 1 kHz, and gating events can be aligned with a resolution of 1 ms. PROFIBUS functions as the real-time I/O connection and also carries timer signals between the inverter and the control system. A V24/RS232 port on the front panel provides local access for configuration and diagnostics. The controller can store 256 command blocks, allowing detailed welding sequences to operate without continuous external sequencing.
The water-cooled inverter uses a 24 V DC control supply that keeps its logic active when the main power supply is isolated. Thermal energy is removed by coolant flowing at 4 l/min through an M16 × 1.5 connection. The inlet water temperature must not exceed 30 °C to keep the power semiconductors within their permitted operating range. The enclosure has an IP20 rating and is intended for protected installation inside a general-purpose electrical cabinet. When connected to a PSG 3100 transformer, the secondary circuit can reach 54 kA for short-pulse resistance welding. The power terminals accept conductors with cross-sectional areas of up to 95 mm². Water cooling removes heat directly from the module without requiring high airflow across the sensitive internal electronics.
