R911203156 (RD51.1-4B-007-L-DF-FW)

RD 500 Drive Controllers

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The R911203156 (RD51.1-4B-007-L-DF-FW) is a Bosch Rexroth drive control unit utilizing a mechanical grid pattern of 22.5mm. Forced air cooling is achieved with airflow entering from below and exiting above. The unit supports a converter voltage of 3 x AC 380 to 480 V (±10%) and is rated for 7 kW output. Minimum clearance requirements are 100mm at both the top and bottom of the control cabinet, and mounting is secured via two support points with internal fastening screws. Brake resistor terminals, the DC link, and line supply connections are situated atop the housing, with three motor connection terminals at the base. The unit includes a built-in brake chopper and starting lockout, and it supports parameterization via a user panel or RDwin PC interface. The device remains at dangerous voltage levels for up to five minutes after switching off due to DC link capacitors. Relative humidity should not exceed 90% condensation-free, and installation altitude must not surpass 1,000m above sea level. Central connection between protective earth and reference ground is required. Additional functions include compatibility with RZC01.1-XT, NAMUR terminal strip, 24 V standby power (external, ≤110 kW), and current filter feedback.