PSI6100.332-L2 Bosch Rexroth Indramat
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The Bosch Rexroth Indramat PSI6100.332-L2 is a medium frequency inverter from the PSI Frequency Inverters series. It is air cooled, operates with a mains voltage of 480 to 690 VAC, and allows a maximum output current of 400 Amps with a maximum welding current of 20 kiloamps. The unit weighs 21 kilograms, supports up to 32 electrodes, and features INTERBUS I/O connection.
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Product Description:
The PSI6100.332-L2 is a medium-frequency inverter manufactured by Bosch Rexroth Indramat within the PSI Frequency Inverters series. It functions as the power stage in resistance-welding installations, converting high-voltage mains power into precisely timed DC pulses for a welding transformer. Its I/O and timer functions operate through the INTERBUS interface, allowing the welding controller to synchronize current, force, and electrode movement with robot motion. By delivering stable current waveforms, the inverter promotes consistent weld nugget quality while reducing spatter and thermal distortion in sheet-metal assemblies.
The inverter supports three-phase networks ranging from 480 to 690 VAC. Under continuous duty, it draws a rated mains current of 110 A, while its output stage can deliver up to 400 A to the welding transformer for short, high-energy pulses. When paired with an appropriate transformer turns ratio, the inverter supports a peak secondary welding current of 20 kA, which is suitable for joining thick galvanized sheet stacks. Memory for 256 programs allows a production line to switch between different material combinations and weld sequences without external reprogramming. This schedule capacity also supports installations that process multiple assembly variants on the same welding station.
The force interface scales sensor output at 1 V per 1 kN, allowing the controller to verify electrode clamping pressure in real time. Power terminals accept cables with conductor areas up to 35 mm², providing connections suitable for the inverter’s current demand. The timer and X5 auxiliary circuit can supervise as many as 32 electrodes, and the auxiliary circuit supports a current of 0.5 A. Embedded logic provides a stabilized 24 VDC control supply for external sensors. The air-cooled chassis measures 239 mm wide, 463 mm high, and 280 mm deep, providing the physical dimensions needed for panel layout. A 3 mm gasket seals the front panel after panel mounting, while the complete assembly weighs 21 kg. The cooling arrangement requires sufficient airflow around the installed chassis so heat can leave the enclosure during repeated welding cycles.
