Product Description:

The VT 3000 S 34-R1 is an analog amplifier card produced by Bosch Rexroth Indramat for the VT 3000 Analog Amplifiers series. Installed in control cabinets, the module conditions low-level command signals so they can drive proportional hydraulic valves and other actuators inside automated machinery. By converting a reference voltage into a controlled current, it forms the interface between a PLC or motion controller and the valve coil, allowing precise pressure or flow regulation within industrial hydraulic circuits.

This card accepts an input control swing of ±9 V and presents a minimum input load of 500 Ω, so standard control electronics can drive it without overload. After amplification, the module can source up to 800 mA, which is suitable for most proportional solenoids while remaining within the device’s thermal limits. All functions are powered from a single 24 VDC ±10% supply, and overall consumption is limited to 30 W, which keeps control power requirements straightforward. The output stage is designed for loads as low as 19.5 Ω; within that range it maintains linearity and avoids current foldback, so compatible valve coils can be matched without uncertainty.

Circuit protection is handled by a board-mounted fuse rated at 2.5 A, which helps protect upstream supplies during short-circuit faults. Internally generated dither uses a minimum pulse frequency of 160 Hz, while the ramp generator can stretch command transitions to a maximum of 1 s to smooth actuator response. Additional parameters include an auxiliary command channel of ±6 V for override functions, a fixed 20 mA bias current to offset mechanical deadband, and a selectable ramp-down time to 0.03 s for rapid stops. Continuous operation is permitted from 0 °C to 50 °C, so the card suits typical factory panel environments with normal ventilation.