PSI65C0.630-W1 Bosch Rexroth Indramat
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MPN: R911174744
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The Bosch Rexroth Indramat PSI65C0.630-W1 is a medium frequency inverter from the PSI Frequency Inverters series. It has a nominal system current of 660 amps and supports a maximum output current of 2400 amps. The unit is water cooled with a cooling water flow rate of 10 liters per minute and features IP20 protection.
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Product Description:
The PSI65C0.630-W1 belongs to the PSI Frequency Inverters series manufactured by Bosch Rexroth Indramat. As a medium-frequency inverter, it converts three-phase supply power into controlled current pulses for resistance welding and other automation tasks that require tightly regulated heat input. Its internal controller manages current profiles and pulse timing to maintain stable energy delivery across changing load conditions. The unit can drive up to five welding electrodes, allowing it to coordinate multiple welding points within an automated production system.
The power section accepts a mains voltage range of 400–480 VAC, while a separate 24 V DC supply powers the control electronics and isolates the logic circuits from line disturbances. Output capability peaks at 2400 A, representing the maximum primary current that the inverter can deliver to the welding transformer. Thermal management relies on a water-cooled heat sink that requires a coolant flow rate of 10 L/min. The enclosure has an IP20 protection rating, so the inverter must be installed inside a suitable cabinet. Internal control processing operates at 1 kHz, coordinating current regulation with MOV-based overvoltage protection that absorbs transient voltage spikes. The controller also provides 256 program slots for parameter storage and uses a V24/RS-232 port for setup data communication.
Secondary circuit performance reaches 120 kA, allowing the inverter to deliver short welding pulses at the electrodes while the nominal system current remains at 660 A during continuous operation. Coolant inlet temperature must not exceed 30 °C, helping the water-cooled heat sink maintain an acceptable operating temperature. The plumbing interfaces use an M16 × 1.5 thread for connection to recirculation manifolds. A backup battery rated at 3.6 V preserves real-time parameters when mains power is removed. A DeviceNet timer synchronizes welding sequences with plant control equipment, allowing coordinated operation with the surrounding automation system.
