Product Description:

The 0 811 405 081 is a plug-in servo amplifier card produced by Bosch Rexroth Indramat for the 1M Servo Amplifier Cards series. Designed for installation in modular automation racks, the board conditions low-level command signals and delivers controlled current to proportional hydraulic or pneumatic actuators. Within an industrial control loop, it feeds the resulting power stage so valves reach the demanded position quickly and repeatably. This arrangement supports stable motion or pressure control in machines that rely on precise valve actuation.

Electrical performance centers on a supply of 24 V DC, allowing direct connection to standard machine power buses. Under maximum load, the card draws 1.25 A and dissipates up to 30 VA, values used to size the supporting power source. The dedicated solenoid channel can deliver 0.8 A, matching many proportional valve coils while helping prevent excessive heating at the actuator. Response is characterized by a valve setting time of 50 ms, so flow changes settle within one control cycle on many presses or test rigs. Differential input terminals reject common-mode noise, and the short-circuit-proof I/O helps protect the board when wiring faults occur. A clocked output stage limits switching losses, and the +10 V/20 mA potentiometer supply supports local gain or offset trimming. Rapid energizing is also supported, which allows the output current to build quickly when the control signal changes.

Mechanical integration follows Eurocard conventions, with a board area of 100 x 160 mm and a front panel width of 7 TE. A keyed DIN 41612-F32 connector mates with the backplane of a 19-inch rack, helping ensure correct insertion and secure electrical contact. Despite the metal faceplate, the assembly weighs only 0.32 kg, so the load on guide rails remains low. The front panel leaves room for status indication and signal access, which supports routine observation of operating behavior without requiring custom mounting hardware.