Product Description:

The VT2000 S47/2 is a plug-in servo amplifier card engineered by Bosch Rexroth Indramat for the VT 1600 Servo Amplifiers series. Mounted in a valve manifold cabinet, it translates analog command voltages from a motion controller into controlled solenoid current, giving hydraulic actuators a proportional response for repeatable positioning and pressure control in automated machinery. The board executes this task without onboard motion algorithms, instead providing the precise current loop that downstream directional or pressure valves require.

It accepts a nominal supply of 24 VDC (+40%/-5%), so operation remains stable even when the bus voltage falls or rises within the permitted tolerance. The bias trimmer can apply from 0 to 300 mA of preload to a valve coil, allowing deadband to be removed before the first command. Control inputs are buffered by an impedance of 100 kΩ, which prevents excessive loading of sensitive reference generators. A precision regulator provides reference rails held to ±9 V ±1%. At full demand, the driver delivers up to 800 mA (+10%/-5%) to a proportional solenoid without overheating.

The board follows the Eurocard footprint of 100 × 160 mm and connects to the backplane through a 32-pin DIN 41612 Form D header, so no flying leads are required. A 2.5 A time-lag fuse protects the supply track, while the driver supports coils with a resistance of 19.5 Ω at 20 °C. The board operates from 0 to 50 °C and can be stored at temperatures from -25 °C to 85 °C. The assembly weighs only 0.1 kg, which minimizes the load placed on the card rack and its mounting hardware. Supply thresholds of 22 V and 35 V provide protection against brownouts and accidental overvoltage.