RD52.2-4B-018-L-A1-FW Bosch Rexroth Indramat
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MPN: R911201024
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The Bosch Rexroth Indramat RD52.2-4B-018-L-A1-FW is a drive controller from the RD 500 Drive Controllers series. It features field oriented vector control, a built-in brake chopper, and supports rated power of 18.5 kW. The unit uses forced air cooling and operates within a voltage range of 380 to 480 V with a ±10% tolerance.
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Product Description:
The RD52.2-4B-018-L-A1-FW drive controller is produced by Bosch Rexroth Indramat as part of the RD 500 Drive Controllers series. This module acts as the central power stage between a three-phase supply and induction or synchronous motors. By modulating voltage and frequency, it enables closed-loop speed and torque control in conveyors, pumps, and material-processing machines used throughout industrial automation. It is intended for variable-speed applications that need stable motor response during changing process demands. It can also reduce mechanical shock on driven equipment by adjusting output gradually instead of applying full power at startup.
During operation, the unit accepts line voltages in the range of 380 to 480 V and delivers up to 18.5 kW of motor power. Motor regulation is achieved through field-oriented vector control, allowing dynamic response to load changes while maintaining a precise speed reference. Thermal management relies on forced air cooling, and the internal fan channels air across the heat sink to keep semiconductor temperatures within limits. For energy returned from rapid deceleration, a built-in brake chopper diverts excess DC-bus voltage to an external resistor to prevent overvoltage trips. Because the controller adjusts output continuously, the motor can follow changing demand without abrupt transitions that disturb the process.
An integrated mains filter suppresses conducted emissions so that the installation meets typical plant EMC limits. The power section uses a three-phase AC supply, and input variations of up to ±10 % are tolerated without derating. The unit is identified as design generation 2. This hardware level supports external standby power and a starting lock-out relay that inhibits unintended motor motion during service or emergency conditions. The standby power arrangement allows control functions to remain available even when the main power stage is not active, and the lock-out function helps keep the motor disabled until the required control conditions are present.
Frequently Asked Questions about RD52.2-4B-018-L-A1-FW:
Q: Does the RD52.2-4B-018-L-A1-FW include a brake chopper?
A: The RD52.2-4B-018-L-A1-FW features a built-in brake chopper for energy management during braking cycles.
Q: What cooling method does the RD52.2-4B-018-L-A1-FW use?
A: This model is designed with forced air cooling for maintaining operating temperatures.
Q: What type of control is implemented in the RD52.2-4B-018-L-A1-FW drive?
A: The control method used is field oriented vector control, optimizing torque and speed performance.
Q: What is the rated power output of the RD52.2-4B-018-L-A1-FW?
A: The RD52.2-4B-018-L-A1-FW operates with a rated power output of 18.5 kW.
Q: What voltage range does the RD52.2-4B-018-L-A1-FW support?
A: It supports a voltage range from 380 to 480 volts, with a tolerance of ±10%.
