RD51.1-5B-003-L-V1-FW Bosch Rexroth Indramat
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MPN: R911200711
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The Bosch Rexroth Indramat RD51.1-5B-003-L-V1-FW is a drive controller from the RD 500 Drive Controllers series. It features a built-in brake chopper, U/f curve control, and is rated for 3.0 kW of power. This controller uses forced air cooling and operates with a voltage range of 500 V on a 3-phase AC supply.
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Product Description:
The RD51.1-5B-003-L-V1-FW is a drive controller manufactured by Bosch Rexroth Indramat within the RD 500 Drive Controllers series. Designed for cabinet installation, the unit converts fixed three-phase mains into a variable output that follows a voltage-to-frequency curve. This allows precise speed control of asynchronous motors used on conveyors, pumps, and general factory equipment. It is suited to applications that need dependable motor-speed adjustment without closed-loop servo operation. Because it varies voltage and frequency together, the controller can support smooth acceleration and deceleration in equipment that does not require encoder-based position feedback.
It employs U/f curve control, so output voltage rises proportionally with frequency and maintains the magnetizing flux of the connected machine without relying on closed-loop feedback. The power stage is rated at 3.0 kW, giving suitable capacity for small and medium-duty motor applications. Line connection is achieved through a 3 x AC converter input, and the permissible mains window is centered on 500 V systems commonly found in industrial plants. A built-in brake chopper is integrated into the DC link, and during rapid deceleration it diverts regenerated energy to an external resistor to reduce overvoltage in the bus. This arrangement is useful where braking events occur repeatedly during normal machine cycles.
Thermal management is handled by forced air cooling, which directs cabinet airflow across the heat sink and keeps internal temperatures within acceptable limits during continuous operation. Control electronics remain active during mains loss because an auxiliary circuit accepts 24 V standby power from an external source, allowing communication and stored settings to remain available while the power section is idle. This feature helps preserve status indication and network availability during short interruptions or controlled shutdowns. The drive is design generation 1, so its mechanical dimensions and option slots match accessories from the same release. The unit requires separate firmware so its control functions can be matched to the connected motor and the intended operating mode.
Frequently Asked Questions about RD51.1-5B-003-L-V1-FW:
Q: What braking component is included in the RD51.1-5B-003-L-V1-FW drive controller?
A: The RD51.1-5B-003-L-V1-FW is equipped with a built-in brake chopper for managing regenerative braking energy.
Q: What control method does the RD51.1-5B-003-L-V1-FW utilize?
A: This model uses a U/f curve control method for motor regulation.
Q: How is the RD51.1-5B-003-L-V1-FW drive controller cooled?
A: The RD51.1-5B-003-L-V1-FW features forced air cooling to maintain operating temperature.
Q: What is the rated power output of the RD51.1-5B-003-L-V1-FW?
A: This drive controller offers a rated output power of 3.0 kW.
Q: What supply type and voltage range does the RD51.1-5B-003-L-V1-FW support?
A: The RD51.1-5B-003-L-V1-FW operates with a 3-phase AC supply and a voltage range of 500 V.
