AK-R2-120P1K2 | Allen-Bradley 120-Ohm External Dynamic Brake Kit for PowerFlex 70 Drives

Allen-Bradley · Motors & Motion

Description  The Allen-Bradley AK-R2-120P1K2 external dynamic brake kit provides controlled energy dissipation for PowerFlex 70 AC drives during deceleration. With a resistance value of 120 ohms, it supports stable braking performance in applications requiring rapid motor slowdown. This kit enhances drive functionality by offering external braking capacity for systems operating across a wide voltage range.     Technical Specifications  Condition New/Never Used Surplus Brand Allen-Bradley Category Drive Accessories Part Number AK-R2-120P1K2 Subcategory External Dynamic Brake Kits Series PowerFlex 70 Product Type External dynamic brake / replacement part Resistance 120 Ohms Continuous Power Rating 0.26 kW Maximum Energy Rating 5 kJ Compatible Drive Voltage 400–480 VAC and 600 VAC systems Drive Power Compatibility 2.2 kW, 4 kW, 5.5 kW, 7.5 kW Minimum Separation Requirement 2 inches (50.8 mm) Heat Protection Not included; requires system-level protection Mounting Style External air-cooled installation Application Use Dynamic braking for AC drives Operating Consideration Can exceed 200°C during operation     Information About AK-R2-120P1K2 The AK-R2-120P1K2 is part of the PowerFlex 70 series of external dynamic braking components designed to integrate seamlessly with Allen-Bradley AC drives. Engineered for use with motor systems rated from 2.2 kW to 7.5 kW, it provides consistent braking support for both 400–480 VAC and 600 VAC installations. The brake resistor offers a continuous power rating of 0.26 kW and is capable of absorbing up to 5 kJ of braking energy in standard configurations. Its construction supports high operating temperatures and requires physical separation from the drive for safe, air-cooled performance. Key Features: 120-Ohm Resistance Value: Provides controlled energy dissipation for PowerFlex 70 braking operations. Supports Multiple Drive Ratings: Compatible with drives rated from 2.2 kW to 7.5 kW across 400–480 VAC and 600 VAC systems. 0.26 kW Continuous Power: Ensures stable long-term braking capability under repeated deceleration cycles. High Energy Handling: Rated for up to 5 kJ absorption for demanding motor applications. External Mounting Requirement: Designed for installation outside the drive enclosure to support safe thermal operation. Minimum Separation Distance: Requires at least 2 inches of spacing for proper air cooling and heat dissipation. Suitable for PowerFlex 70 Drives: Integrates directly with Allen-Bradley’s mid-range AC drive platform. The AK-R2-120P1K2 delivers the reliability and precision required for external dynamic braking in AC drive systems.

Brand: Allen-Bradley · Category: Motors & Motion

Key features

• 120-Ohm Resistance Value: Provides controlled energy dissipation for PowerFlex 70 braking operations.
• Supports Multiple Drive Ratings: Compatible with drives rated from 2.2 kW to 7.5 kW across 400–480 VAC and 600 VAC systems.
• 0.26 kW Continuous Power: Ensures stable long-term braking capability under repeated deceleration cycles.
• High Energy Handling: Rated for up to 5 kJ absorption for demanding motor applications.
• External Mounting Requirement: Designed for installation outside the drive enclosure to support safe thermal operation.
• Minimum Separation Distance: Requires at least 2 inches of spacing for proper air cooling and heat dissipation.
• Suitable for PowerFlex 70 Drives: Integrates directly with Allen-Bradley’s mid-range AC drive platform.

Specifications

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