VT-MRPA1-150-1X/V0/0

***Disclaimer: The following summary contains information gathered from various sources such as product descriptions, technical specifications and catalogs. While efforts have been made to provide accurate details, inaccuracies may occur. It is advised to verify all information by contacting Bosch Rexroth directly.***
The Bosch Rexroth VT-MRPA1-150-1X/V0/0 (R901080965) is an advanced amplifier module designed for use with proportional valves in hydraulic systems. This module is engineered to be easily mounted on top hat rails in accordance with EN standards and connects electrically through screw terminals, operating on a direct voltage of V. It features a built-in power supply unit equipped with a making current limiter that supplies all necessary internal voltages while preventing high current peaks during activation. With command value presetting, the VT-MRPA1-150-1X/V0/0 calculates the internal command value signal by combining the external command value signal from the differential input and adjustments made via the zero point potentiometer. This function ensures that solenoid current and corresponding valve pressure increase proportionally to positive command values. The enable function of this amplifier module activates the current output stages and conveys the internal command value signal to the ramp generator. This function includes an LED indicator and ensures that any valve control is not abrupt but gradual, following a set ramp time. The ramp generator within the module controls the incline of the control output without altering ramp time, which can be set and measured through specific sockets and calculations provided by Bosch Rexroth. Additionally, an amplitude attenuator allows for hydraulic requirements to be met by adjusting maximum values, while an amplitude limiter confines internal command values within preset bounds. This module also incorporates an oscillator for generating control signals for inductive position transducers, a demodulator for actual value signal processing from transducer signals, and a controller optimized to reduce valve hysteresis. The robust current output stage delivers pulsed solenoid current up to a limited amount and features short-circuit protection as well as deactivation under fault conditions or missing enable signals. For fault recognition, this product monitors position transducer cables for breakages or short circuits on the primary side and detects overcurrents at its output stage. Its modular design is compatible with FREX valves within component series X and includes additional features such as differential input voltage, adjustable zero point/sensitivity, enable input, cable break detection for actual value cables, reverse polarity protection for operating voltage, along with LED displays indicating operation readiness and enable status.