Product Description:

The VT-VPCD-1-1X/V0/1-D-1 is an electronic proportional valve controller in the VT-VPCD Drives series from Bosch Rexroth Indramat. Designed for cabinet mounting inside hydraulic or electro-hydraulic systems, the unit converts digital or potentiometer references into conditioned analog signals that energize proportional valves and related actuators. By integrating signal conditioning and a serial link, it supports closed-loop pressure or flow regulation in automated machinery. It also serves as the link between a machine's PLC and the valve coil so commanded setpoints are reproduced accurately at the actuator input.

At its analog output, the module can swing up to ±10 V, and the connected valve must present at least 1 kΩ of load to avoid saturation. For current-mode feedback channels, the input stage presents 100 Ω of resistance, while the converter resolves changes as small as 5 µA, allowing fine adjustment of valve position. Internal consumption peaks at 3.5 A, so the power supply must provide adequate current reserve. The controller operates from a 24 VDC rail and remains functional between 21 V and 30 V, and it can also forward reference commands of ±10 V or up to 30 mA to external devices without additional buffers.

The control loop executes every 2 ms, which is fast enough to help damp hydraulic oscillations without placing unnecessary demand on the processor. Parameterization and diagnostics are handled through the RS-232 interface, providing direct local access without network adapters. When voltage references are used instead of current loops, the input impedance rises to 100 kΩ, which minimizes loading on sensitive PLC outputs. The unit weighs only 0.2 kg, so DIN rail sections do not require extra bracing, and onboard regulators maintain stable operation across the full supply range.