21.56.B80-4008
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The KEB 21.56.B80-4008 is a controller module from the BR Braking Resistors and needs to be mounted using a screw-in module, with the TB712 terminal block ordered separately. The module operates within an input voltage range of 100-240 VAC, has a power consumption of 14.5 Watts, and offers two CAN interfaces.
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Product Description:
21.56.B80-4008 is an external breaking resistor. It is manufactured by KEB for industrial use. Its resistance is 11 Ohms and its power rating is 7200 Watts. The resistor is designed to deliver reliable performance in heavy-duty electrical systems. With a power rating of 7200 Watts, this resistor is built to efficiently dissipate high amounts of energy, making it ideal for dynamic braking applications in industrial environments. The resistor has an impedance of 11 Ohms and is engineered to handle substantial electrical loads while ensuring operational stability. The 21.56.B80-4008 has a robust electrical mesh housing. This housing prevents accidental contact with the heat-generating resistor components that can get very hot during operation. In this way, the resistor housing prevents accidents caused by accidental contact. By ensuring smooth airflow, the mesh housing also enables effective heat dissipation.
21.56.B80-4008 is designed as an accessory for KEB Combivert drive converters. Operators must ensure that the supply voltage is switched off before any maintenance activity. The drive should be allowed to stop to prevent generation of regenerative energy. Converters fitted with KEB braking resistors are suitable for four-quadrant operation. Depending on the application requirements, the resistor can be mounted below or adjacent to the inverter. Energy refed into the DC link during drive deceleration is dissipated via the resistor as heat to prevent overvoltage errors. To ensure proper application, the relevant load limit must be taken into account during resistor selection. Setting for the braking ramp is done at the inverter. The braking time can be set according to a formula specified in the product manual. The permissible ambient temperature for operation is from -40 to 45 degrees Celsius.
Frequently Asked Questions about 21.56.B80-4008:
Q: Where can you mount the resistor?
A: You can mount the resistor below or besides the drive.
Q: What type of housing does the resistor have?
A: The resistor has a metal mesh housing.
Q: What is the benefit of the metal mesh?
A: The mesh prevent accidental with hot parts and allows airflow for heat dissipation.
Q: What is the operating temperature?
A: The operating temperature is -45 to 45 degrees Celsius.
Q: What is a critical factor is resistor selection?
A: The load limit is a critical factor for resistor selection.
