PSI65C0.637-W1 Bosch Rexroth Indramat
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The Bosch Rexroth Indramat PSI65C0.637-W1 is a medium frequency inverter from the PSI Frequency Inverters series. It features water cooling with a minimum flow rate of 10 liters per minute and supports a mains voltage of 400 to 480 VAC. The unit is equipped with 8 discrete inputs and 8 discrete outputs, operating at 24 VDC.
Internal Product Review
The PSI65C0.637-W1 is a Bosch Rexroth Indramat medium frequency inverter built for demanding process control with water-cooled thermal management. Operation on 400 - 480 VAC mains and a 1000 Hz sequence frequency supports stable high-speed inverter performance in heavy-duty installations. Eight discrete inputs with eight discrete outputs simplify machine integration, making this unit a strong choice for coordinated industrial systems.
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Product Description:
The PSI65C0.637-W1 is a medium-frequency inverter produced by Bosch Rexroth Indramat in the PSI Frequency Inverters series. Intended for industrial automation, it converts stable three-phase plant power into a regulated high-frequency output that feeds induction heaters, resonant converters, or other equipment requiring kilohertz-range energy transfer. The unit mounts inside a switch cabinet and interfaces with machine controllers through low-voltage I/O lines.
In operation, the inverter accepts a three-phase supply between 400–480 VAC, and its primary circuit can draw up to 2400 A during peak power cycles. Internally, a modulation rate of 1000 Hz establishes the medium-frequency sequence delivered to the connected resonant network. It provides 8 discrete inputs and 8 discrete outputs, each referenced to a 24 VDC control rail, so standard PLC cards can command start, stop, and diagnostic lines without level shifting. Field wiring is clamped with M10 terminal screws, and power conductors terminate on cable lugs for low-resistance joints. A floating contact stop circuit is sized for 24 VDC at 3 A, allowing direct insertion into emergency chains. Process supervision is assisted by digital pressure feedback, an analog pressure output, and a DeviceNet timer that coordinates sequence events with higher-level controllers.
Thermal stability is secured by a water-cooled heat sink that must receive at least 10 l/min of coolant. That flow limits the pressure drop to 0.65 bar and removes up to 4400 W of semiconductor loss. Beyond the liquid loop, the switch cabinet dissipates 100 W when idle and 850 W at maximum current, figures that guide enclosure ventilation design. Continuous operation is possible without derating when coolant flow is maintained and the required pressure differential is available.
