Product Description:

The RS51.1-4G-024-L-V1-FW is a basic drive controller manufactured by Bosch Rexroth Indramat for the RD 500 Drive Controllers series. Installed in a control cabinet, the unit forms the power stage between a plant’s three-phase line supply and an AC motor. By modulating output frequency and voltage, it supports closed-loop speed control for conveyor lines, pumps, and processing equipment. Because the inverter stage adjusts motor voltage together with frequency, the controller can support steady low-speed operation as well as normal production speeds. It is intended for variable-speed AC motor applications that need controlled acceleration and deceleration.

Its continuous capability is 24 kVA, so the drive can feed motors within that apparent power range without thermal derating. The input window spans 380 to 480 V, and the electronics tolerate line fluctuations of ±10 %, which supports operation on common industrial power systems. The internal regulator uses U/f curve control; this method keeps the voltage-to-frequency ratio stable so motor flux remains consistent across the speed range. A built-in brake chopper with an integrated resistor dissipates regenerative energy during deceleration or overrunning loads. The drive is generation 1 and uses the standard layout for this product line.

Thermal management relies on forced air cooling, so mounting space must allow an unobstructed airflow path through the cabinet. The drive also contains an integrated mains filter that reduces conducted emissions and simplifies line-side integration. Control electronics remain active when a machine is idle through the 24 V standby power feature, which is supplied externally to preserve parameter memory and support network communication. This helps the unit stay ready for control commands during short production stops. The incoming feeder uses a three-phase AC converter input topology.