PSI6100.631-L2 Bosch Rexroth Indramat
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MPN: R911321451
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The Bosch Rexroth Indramat PSI6100.631-L2 is a medium frequency inverter from the PSI Frequency Inverters series. It operates with a mains voltage range of 480 to 690 VAC and a nominal current of 110 Amps, using air cooling as its method. The device features 8 digital inputs and 8 digital outputs, with DeviceNet for the I/O bus interface.
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Product Description:
Bosch Rexroth Indramat produced the PSI6100.631-L2 as part of the PSI Frequency Inverters series. Classified as a medium-frequency inverter, it converts high-voltage three-phase mains power into controlled medium-frequency output for induction heating, melting, or surface-hardening processes used in automated manufacturing lines. The unit is intended for control-cabinet installation, where it can operate continuously within tightly integrated power-conversion assemblies. Its role is to deliver stable process power for equipment that depends on repeatable thermal cycles and controlled heating profiles.
The inverter accepts a three-phase supply range of 480 – 690 VAC and draws a nominal line current of 110 A during rated operation. Internal switching at a primary frequency of 1 kHz produces medium-frequency power while generating baseline cabinet heat of 100 W. When the output is loaded to its maximum rated level, thermal losses rise to 200 W, and forced convection must be sized for a total heat rejection capability of 420 W. Because the power stage is air cooled, the installation requires a minimum clearance of 100 mm around the heat sink channels and a minimum mains conductor cross-section of 35 mm². A 3 mm cabinet door gasket helps maintain airflow paths and keeps conductive dust away from live parts.
Control and protection interfaces are handled through a DeviceNet fieldbus, which also supports the unit’s integrated timer functions. Eight digital inputs and eight digital outputs allow stand-alone permissive, fault, and sequence signaling without extra interface cards, while also giving the controller a direct way to exchange status information during process operation. A built-in power supply delivers 24 VDC at up to 2 A for contactors, relays, or sensor clusters, which helps reduce panel wiring. On the power side, the converter can sustain continuous primary conduction of 400 A, while its matched PSG 3100 transformer secondary can tolerate fault currents up to 20 kA without damaging the commutation path. This current capability suits medium-frequency melting and heating applications that cycle rapidly and require high momentary amperage.
