Overview
The Allen-Bradley 1336-MOD-KB050 Series D is a heavy-duty dynamic braking unit designed for use with 1336 and 1336VT FORCE, PLUS, PLUS II, and IMPACT AC drives. This module automatically manages DC bus overvoltage conditions by engaging internal braking resistors to dissipate excess power, preventing costly drive trips and reducing downtime in industrial automation applications.
Key Features
- Automatic DC Bus Monitoring: Continuously monitors DC bus voltage and activates braking resistors when detecting a sharp voltage rise, then disconnects when voltage returns to configured limits.
- Heavy-Duty Construction: NEMA Type 1 (IP20) enclosure with integrated fans and status indicators for “Brake ON” and “DC Bus” conditions.
- Compatible Drive Ratings: Supports 1336 and 1336VT drive ratings B040–B060 with voltages of 380 VAC, 415 VAC, or 460 VAC.
- High Braking Torque: Delivers 100% torque for 20 seconds during dynamic braking, with 20% duty-cycle torque capability.
- Wide Operating Range: Functions reliably at altitudes up to 1000 meters without derating; operates from –10°C to +50°C at up to 95% non-condensing humidity.
- Internal Protection: Internally fused brake components and built-in thermal management via integrated cooling fans.
Technical Specifications
- Voltage Rating: 380 VAC, 415 VAC, 460 VAC
- Power Rating: 37 kW (50 HP)
- Brake Resistor Value: 10.5 Ω
- Average Power Dissipation: 7000 W
- Braking Torque: 100% for 20 seconds; 20% duty cycle
- Compatible Drive Ratings: B040–B060
- Enclosure Rating: NEMA Type 1 (IP20)
- Operating Temperature: –10°C to +50°C
- Humidity Range: 5% to 95% non-condensing relative humidity
- Maximum Altitude: 1000 meters without derating
- Dimensions: 16 x 24 x 9.75 inches (406 x 610 x 248 mm)
- Weight: 75 lbs (33.8 kg)
- Control Voltage: Customer-supplied 115 VAC, 1-phase, 50/60 Hz
- Fan Input Power: 600 mA
- Brake Enable Signal: 50 mA maximum
Typical Applications
The 1336-MOD-KB050 is used in applications where rapid motor deceleration or load overhauling conditions create excess voltage on the AC drive’s DC bus. Common industries include:
- Material Handling: Conveyor systems, hoists, and crane controls requiring dynamic braking for load holding.
- Packaging Machinery: Horizontal form-fill-seal systems and rotary machinery needing precise speed control and braking.
- Textile & Converting: Unwinders and rewinders where overhauling loads demand active braking.
- Paper Mills & Print: Tension control systems and web-handling applications.
- Metal Processing: Shears, presses, and rolling mills with regenerative load cycles.
Compatibility & Replacements
Compatible With
- Allen-Bradley 1336 FORCE, PLUS, PLUS II AC Drives (B003–B200)
- Allen-Bradley 1336VT FORCE, PLUS, PLUS II, IMPACT AC Drives (B003–B250)
- 1336 and 1336VT drive ratings B040–B060
- 380 VAC, 415 VAC, and 460 VAC three-phase power systems
Replaces / Drop-In Replacement For
The 1336-MOD-KB050 is a Series D original equipment module. Verify compatibility with your system integrator before ordering a replacement to ensure drive model and firmware compatibility.
Works With
- Rockwell Automation 1336 adjustable frequency drive systems
- Studio 5000 / RSLogix programming and configuration (via drive parameters)
- Modular brake configurations (can be operated in parallel with other brake modules for higher power dissipation)
- DC bus overvoltage monitoring and protection via drive firmware integration
