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AX2090-BW50-0600 Beckhoff

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The Beckhoff AX2090-BW50-0600 is part of the AX Digital Servo Drives series and has a power rating of 600 W at 40 degrees Celsius. It features a protection class of IP20, a resistance of 47 ohms, and weighs 3 kilograms. This servo drive uses a switching current of 2 A and requires an adjacent clearance of 200 mm with a top clearance of 300 mm.

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Product Description:

The AX2090-BW50-0600 braking resistor is supplied by Beckhoff for use with the AX Digital Servo Drives series. As a shunt element, it converts excess regenerative energy from decelerating servo axes into heat, preventing overvoltage in the DC link of the drive system. The unit fits cabinet-mounted automation panels and complements the manufacturer’s regenerative drive topology. In normal use, it supports controlled deceleration when the connected motor returns energy faster than the drive can absorb it internally.

At 40 °C ambient, the resistor can absorb up to 600 W of continuous thermal load, allowing medium-power axes to brake repeatedly without tripping. The enclosure carries an IP20 protection class, which indicates finger-safe live parts but no protection against water. Above the stated base temperature, allowable power falls by 4% per 10 K, so warmer cabinets reduce the available braking reserve. A bimetal switch inside the housing can interrupt control circuits rated at 2 A when an overheat event is detected. That same switch activates once the resistor body reaches 180 °C, enabling the drive controller to remove the load or issue a fault before insulation limits are exceeded. This arrangement gives the drive a direct temperature-related signal instead of relying only on software estimation.

Cabinet installation must respect an adjacent clearance of 200 mm to the next component and a top clearance of 300 mm to promote upward convection. The brake circuit connects through a dedicated cable with a cross-section of 1.5 mm², while the temperature switch uses a separate 0.75 mm² pair to keep the low-voltage signal apart from the power path. The switch is a potential-free normally closed contact, which makes it easy to place in an interlock or fault-monitoring circuit. The resistor element has a resistance of 47 Ω, so braking current is limited by the DC-link voltage present at the time of deceleration. Overall assembly weight is 3 kg, which is suitable for typical panel mounting hardware.

Adjacent Clearance
200 mm
Brake Cable Size
1.5 mm²
Power Loss Derating
4% per 10 K
Power Rating At 40 °c
600 W
Protection Class
IP20
Resistance
47 Ω
Switching Current
2 A
Switching Temperature
180 °C
Temp Switch Cable
0.75 mm²
Temp Switch Contact
Potential-Free N/C
Top Clearance
300 mm
Weight
3 kg

Frequently Asked Questions about AX2090-BW50-0600:

Q: What is the power rating of the AX2090-BW50-0600 servo drive at 40°C?

A: The AX2090-BW50-0600 has a power rating of 600 W at 40°C.

Q: What is the required brake cable size for the AX2090-BW50-0600?

A: The AX2090-BW50-0600 brake cable should have a cross-section of 1.5 mm².

Q: What protection class is provided by the AX2090-BW50-0600?

A: This model has a protection class of IP20, offering basic protection against solid objects.

Q: What installation clearances are needed for the AX2090-BW50-0600?

A: The adjacent clearance required for this drive is 200 mm, with a top clearance of 300 mm.

Q: What type of temperature switch contact is used in the AX2090-BW50-0600?

A: It is equipped with a potential-free normally closed temperature switch contact.


Internal Product Review

  • ‘‘The AX2090-BW50-0600 is a Beckhoff braking resistor for AX digital servo drives, well suited for controlled energy dissipation with 47 Ω resistance and a 600 W rating at 40 °C. IP20 protection and a potential-free N/C temperature switch support dependable cabinet integration and straightforward status monitoring. A 180 °C switching temperature stands out as a strong thermal protection feature.’’

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