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PSI65C0.120-W1 Bosch Rexroth Indramat

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The Bosch Rexroth Indramat PSI65C0.120-W1 is a medium frequency inverter from the PSI Frequency Inverters series. It is water cooled, has a protection rating of IP20, and weighs approximately 25 kg. The inverter operates with a mains voltage of 400 to 480 VAC and a maximum primary current of 2400 A.

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Product Description:

The PSI65C0.120-W1 is a medium-frequency inverter manufactured by Bosch Rexroth Indramat within the PSI Frequency Inverters series. The unit interfaces with welding transformers to deliver controlled high-current pulses, enabling repeatable energy input during resistance welding and other metal-joining processes on automated lines. Its internal electronics also provide 24 V logic power and field I/O, allowing the inverter to be installed directly in the machine cabinet without separate auxiliary power supplies.

Mains power enters through three phases at 400 to 480 VAC and 50 or 60 Hz, so the inverter can be wired directly to standard plant distribution systems. Under nominal conditions, the supply draws 330 A without additional cabinet cooling, while the internal bus and IGBT stage can handle a primary peak current of 2400 A. The unit can deliver up to 120 kA of secondary current to welding transformers when paired with the PSG 3100 rectifier. The modulation sequence operates at 1000 Hz, allowing tight heat control with reduced spatter. Discrete I/O operates at 24 V DC, and the stop circuit supports 24 V DC at 3 A for emergency shutoff. An integrated 24 V DC supply provides up to 2 A for external sensors or valve coils, reducing the need for auxiliary hardware.

Thermal management relies on a water-cooled plate that removes up to 4,400 W of inverter heat, while basic cabinet losses range from 100 W to 850 W depending on the duty cycle. The separate electronics section generates 420 W of heat, which must be considered when sizing the heat exchanger. The enclosure has an IP20 degree of protection and is approved for the 3K3 climatic category. Operation is permitted from +10 to +55 °C, while storage is permitted from -25 to +70 °C. Communication with the cell controller is handled through a serial interface with 128 inputs and 128 outputs. Timer functions and discrete chains share a single 24 V DC rail. The unit weighs 25 kg, allowing it to be mounted on a suitably rated slide-out cabinet shelf.

Cabinet Basic Losses
100 W
Cabinet Losses Max
850 W
Climatic category
3K3 according to EN 60721-3-3
Cooling Method
Water Cooled
Degree of protection
IP 20
Discrete I/o Voltage
24 VDC
Integrated power supply unit Output current
max. 2 A
Integrated power supply unit Output voltage
24 VDC
Mains frequency
50 or 60 Hz
Mains Nominal Current
330 A (No Cab. Cooling)
Mains Voltage
400 - 480 VAC
Max Cooling Losses
4400 W
Max Primary Current
2400 A
Max Weld Current
120 kA (PSG 3100)
Max. cooling losses
420 W
Product Type
Medium Frequency Inverter
Protection Rating
IP20
Sequence Standard
1000 Hz
Serial I/o
128 In / 128 Out
Stop Circuit Load
24 VDC / 3 A
Temperature range Operation
+10 -+55 ºC
Temperature range Storage / transport
-25 - +70 ºC
Timer Type
24 V
Weight
approx. 25 kg

Frequently Asked Questions about PSI65C0.120-W1:

Q: What is the required mains voltage for the PSI65C0.120-W1 frequency inverter?

A: The PSI65C0.120-W1 operates on a mains voltage ranging from 400 to 480 VAC, allowing integration into various industrial power systems.

Q: What cooling method is used for the PSI65C0.120-W1 inverter?

A: This model uses water cooling, ensuring efficient heat dissipation during operation.

Q: What is the protection rating of the PSI65C0.120-W1?

A: The PSI65C0.120-W1 frequency inverter has a protection rating of IP20.

Q: How many serial inputs and outputs does the PSI65C0.120-W1 provide?

A: This device features a serial I/O with 128 inputs and 128 outputs.

Q: What is the output rating of the integrated power supply unit in the PSI65C0.120-W1?

A: The integrated power supply unit delivers a 24 VDC output voltage with a maximum output current of 2 A.


Internal Product Review

  • ‘‘The PSI65C0.120-W1 is a medium frequency inverter with water-cooled thermal management, making it a strong fit for high-duty welding systems. IP20 protection and a 400 to 480 VAC mains range support dependable cabinet integration across standard industrial power platforms. A maximum weld current of 120 kA stands out as a major performance advantage.’’

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