Bosch Rexroth VT-MRMA1-1-11 V0 0 Valve Amplifier

Bosch Rexroth VT-MRMA1-1-11/V0/0 is an analog valve amplifier module designed to drive proportional valves in hydraulic control systems. As part of the VT-VSPA Proportional Amplifiers family, it converts a low‑level control signal into the valve‑spool positioning command that governs actuator flow and pressure. The unit operates from a 24 V DC supply and accepts either a 4–20 mA current input or a 0–10 V input, providing flexible interfacing with common PLCs and industrial controllers. It mounts on a DIN rail for straightforward integration into standard control cabinets. A small internal potentiometer (often referred to as Zp) allows fine adjustment to align the measured signal with the valve’s actual response, enabling precise calibration of the valve characteristic. When used with a proportional valve that provides position feedback, the amplifier can be part of a closed‑loop control approach, where the command signal is continuously mapped to valve position to achieve stable, repeatable operation. Typical applications include hydraulic systems requiring accurate proportional valve positioning for pressure or flow regulation, servo‑valve actuation, and test rigs where repeatable valve motion is essential. This specific configuration—VT-MRMA1-1-11/V0/0—identifies the exact input/output wiring and interaction behavior within the VT‑VSPA series.