RD51.1-4B-018-L-C1-FW Bosch Rexroth Indramat
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MPN: R911200423
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The Bosch Rexroth Indramat RD51.1-4B-018-L-C1-FW is a drive controller from the RD 500 Drive Controllers series. It features a built-in brake chopper, U/f curve control, and forced air cooling. The unit has a rated power of 18.5 kW and operates within a voltage range of 380 to 480 V with an integrated mains filter.
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Product Description:
The RD51.1-4B-018-L-C1-FW is a drive controller produced by Bosch Rexroth Indramat within the RD 500 Drive Controllers series. It is intended to regulate three-phase induction motors in automated production lines, conveyors, and processing machines where adjustable speed is needed during normal operation. By converting fixed mains power into variable-frequency and variable-voltage output, the unit lets the motor respond to changing load conditions without relying on mechanical gear changes. This supports smoother process adjustment when a machine must speed up, slow down, or hold a consistent operating point under varying demand.
The control method uses U/f curve control, so output voltage rises with frequency to maintain motor magnetization during acceleration and load changes. A built-in brake chopper handles regenerative energy during rapid deceleration and helps protect the DC link from overvoltage when rotating loads return energy to the drive. Thermal management uses forced air cooling, supporting continuous operation at a rated output of 18.5 kW. The power section accepts 380 to 480 V input, allowing the same controller to serve common industrial mains systems without requiring a different unit for each standard voltage range.
The supply configuration is a 3 x AC converter, which allows direct connection to a three-phase mains source. The unit is built in design generation 1, which identifies this release and its matching option card arrangement. The input side tolerates voltage variation of ±10 % around the nominal range, helping the controller remain stable during moderate line fluctuations. A separate 24 V standby power feed can keep communication functions active when the main power stage is switched off on converters rated up to 110 kW. This is useful when the control system must remain responsive during standby or a controlled shutdown.
Frequently Asked Questions about RD51.1-4B-018-L-C1-FW:
Q: Does the RD51.1-4B-018-L-C1-FW drive controller include a brake chopper?
A: The RD51.1-4B-018-L-C1-FW features a built-in brake chopper as part of its standard configuration.
Q: What type of control is implemented in the RD51.1-4B-018-L-C1-FW drive controller?
A: This model uses U/f curve control for managing motor speed and performance.
Q: How is the RD51.1-4B-018-L-C1-FW drive controller cooled?
A: The RD51.1-4B-018-L-C1-FW is equipped with forced air cooling for thermal management.
Q: What is the operating voltage range for the RD51.1-4B-018-L-C1-FW drive controller?
A: This drive controller operates within a voltage range of 380 to 480 V AC.
Q: What is the rated power of the RD51.1-4B-018-L-C1-FW drive controller?
A: The rated power output for the RD51.1-4B-018-L-C1-FW is 18.5 kW.
