PSI63C0.630-W2 Bosch Rexroth Indramat
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The Bosch Rexroth Indramat PSI63C0.630-W2 is a medium frequency inverter from the PSI Frequency Inverters series with a mains voltage range of 480 to 690 VAC. It is equipped with water cooling, an IP20 protection rating, and supports programming via a 9-pin D-Sub V24/RS232 interface. The inverter features a timing resolution of 1 millisecond and a program capacity of 256 programs.
Internal Product Review
The PSI63C0.630-W2 is a medium frequency inverter engineered for demanding welding applications, with water-cooled operation and IP20 protection. A 480 - 690 VAC mains range paired with 1 ms timing resolution gives the inverter impressive process stability and precise weld control.
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Product Description:
The PSI63C0.630-W2 is a medium-frequency inverter module manufactured by Bosch Rexroth Indramat for the PSI Frequency Inverters series. In resistance-welding and similar process lines, the unit converts three-phase mains power into regulated DC and pulsed AC that a transformer can deliver to welding electrodes. By coordinating current, time, and cooling parameters, the inverter forms a core element of automated joining cells and other industrial stations that demand tightly controlled electrical energy delivery.
The inverter accepts a three-phase input range of 480 – 690 VAC and processes it with medium-frequency switching; this defines its classification as a Medium Frequency Inverter. A Water Cooled heat-exchanger plate removes switching losses so full output can be sustained in confined cabinets, while the enclosure meets IP20 ingress protection for indoor, finger-safe installations. The device stores up to 256 parameterized welding programs, held in buffered RAM so they stay resident during cycle pauses. Each sequence can call three weld time blocks and up to nine impulses, guided by a DeviceNet timer with 1 ms resolution; the 1 ms granularity lets the control synchronize electrode force, current rise, and hold periods. An electrode capacity of five spots per controller segment supports multi-gun fixtures without overloading internal timers or memory.
Program retention for long downtimes depends on an internal battery pack that uses Lithium chemistry in a standard AA format; its 3.6 V rating maintains the buffered RAM when mains power is off. Firmware images reside in flash memory, ensuring that drive code is not lost during battery replacement. Field updates and diagnostic commands reach the inverter through a V24/RS232 serial link that terminates at a 9-Pin D-Sub connector on the front panel, keeping setup separate from network traffic. Combined with the flash firmware store and the DeviceNet timer described earlier, this communication path allows parameter downloads without stopping production.
