Product Description:

The RD52.1-8C-075-W-V1-FW is a drive controller produced by Bosch Rexroth Indramat for the RD 500 Drive Controllers series. In an automation cell, this unit converts a fixed DC bus into variable three-phase output so induction or synchronous motors can follow commanded speed or torque profiles. When installed in multi-axis cabinets, it supports coordinated motion, manages fault responses, and relays status data to higher-level PLCs. This role makes it suitable for applications that require controlled motor operation from a shared power architecture.

This controller uses field-oriented vector control, a modulation method that separates motor current into flux-producing and torque-producing components for accurate shaft response, even at low frequency. Heat removal is handled through a closed-loop liquid cooling circuit, which supports high current density without raising cabinet air temperature as much as internal air cooling. A rated output of 75 kW indicates the continuous power available to the connected machine section. The unit uses an inverter DC link, so it operates from a DC supply source rather than a direct AC mains input. Its input voltage can reach 700 V, which suits high-power installations that use elevated bus levels to limit current and reduce conductor size.

For the control electronics, the device accepts external 24 V standby power, which keeps diagnostics and basic control functions available when the main bus is de-energized. During startup, it supports operation as RD51 SFT, allowing parameter structure and I/O behavior to remain aligned with that configuration. Its design is identified as generation 1, which corresponds to the enclosure layout and connector pinouts used across early RD52 builds. The controller can therefore fit applications that already use this drive family and require the same control approach.