Description

REXRTOH VT-MVTW-1-16/DVT-MVTW-1-16/D

1. Basic Information

REXROTH VT-MVTW-1-16/D is a high-performance hydraulic servo amplifier control module, serving as an industrial dedicated closed-loop drive control unit for proportional valves and servo valves. Designed for high-precision hydraulic control systems, it is compatible with various proportional directional valves, pressure valves, flow valves and servo actuators. As a core amplifying drive component for accurate closed-loop regulation of speed, pressure and flow of hydraulic equipment, it is widely used in hydraulic machine tools, forging equipment, injection and die-casting machinery, test and inspection devices and various automatic hydraulic systems.

Adopting standard European board structure, the module integrates signal conditioning, PID closed-loop calculation, power amplification, bus communication and comprehensive fault protection functions. It can directly drive and control hydraulic valve groups, effectively solving common drawbacks of traditional hydraulic control such as slow response, low precision, parameter drift and weak anti-interference capability. Featuring fast dynamic response and high-resolution regulation, it enables stepless precise adjustment of system pressure, flow and speed, and greatly improves equipment operational stability, processing consistency and technological accuracy.

Built with industrial reinforced modular design, it has standard and compact structure with excellent vibration resistance and electromagnetic interference immunity. It supports high-speed industrial bus communication including EtherCAT and can seamlessly connect with various PLCs, industrial controllers and upper control systems. With programmable parameters, online debugging, auto-tuning and self-diagnosis functions, it adapts to long-term continuous operation and harsh workshop conditions, acting as the core control and amplification unit for high-precision industrial hydraulic automation systems.

2. Technical Specifications

2.1 Core Electrical & Control Specifications

Power Supply: Standard 24VDC industrial control power supply, adaptable to frequent industrial voltage fluctuations with stable power consumption. Built-in power-on soft-start circuit restrains inrush current to protect rear valves, sensors and internal circuits, enhancing electrical safety of the system.
Drive Output Capacity: Maximum driving current reaches 16A. High-power output directly drives large-flow proportional valves, high-frequency servo valves and heavy-load hydraulic actuators without external amplifiers, suitable for heavy-duty, high-frequency and high-speed hydraulic control conditions.
Control Performance: Full digital closed-loop control algorithm supports flexible switching of pressure, flow and speed closed-loop modes. Embedded high-precision PID regulation, ramp generation, step compensation and valve lap compensation algorithms deliver fast response within 10ms, ultra-low steady-state error and feedback resolution up to 0.1% with superior control linearity.
Signal & Bus Configuration: Compatible with standard industrial analog signals, supporting 0-10V and 4-20mA signal input and output. Integrated high-speed EtherCAT bus interface realizes high-speed data exchange, real-time parameter reading and writing, remote configuration and multi-device coordinated control, matching modern automatic bus control systems.
Parameter Adjustability: Proportional, integral and differential gains are adjustable within 0-100%, and control output ranges from 0 to 100% in stepless mode. Built-in trim potentiometers support local fine tuning, while remote parameter setting via software is available to fit diverse valve characteristics and working conditions.
Protection Mechanism: Comprehensive protection functions cover overcurrent, overvoltage, undervoltage, short circuit, overtemperature, abnormal load and signal breakage. Fault status can be locked and abnormal output cut off instantly to prevent burnout of valves, modules and complete equipment, greatly improving system reliability.
Environmental Adaptability: Wide operating temperature: -20℃~+60℃; storage temperature: -40℃~+85℃. Operating humidity: 5%~95% non-condensing. It features outstanding dustproof, moistureproof, oil-resistant and anti-interference performance, capable of stable long-term operation in vibrating, dusty and strong electromagnetic industrial hydraulic sites.

2.2 Physical & Structural Specifications

Installation Mode: Standard European DIN board design fits slot mounting of industrial control cabinets, complying with DIN41494 and DIN41612 standards. Firm installation resists operational vibration without displacement, applicable to densely arranged cabinets.
Physical Dimension: Standard size 100mm×160mm×55mm. Compact layout occupies limited cabinet space, suitable for integrated electric control schemes and renovation of new and old equipment.
Weight: Lightweight design with net weight about 0.17kg. It brings little load to cabinets and facilitates on-site assembly, replacement and daily maintenance.
Material & Protection: High-strength flame-retardant substrate with moisture and corrosion resistant surface treatment realizes excellent anti-aging, oil resistance and impact resistance. Multi-layer internal shielding effectively isolates external electromagnetic interference and maintains stable control signals without parameter drift.
Interface Features: Clearly divided ports include power, analog signal, bus communication and valve power output terminals. Standard terminals ensure convenient plugging and reliable contact with anti-loose structure, avoiding disconnection and signal anomalies caused by vibration.
Status Indication: Built-in LED indicators intuitively display power, operation, bus connection and fault alarm status, enabling quick inspection, status recognition and fault location to boost maintenance efficiency.

2.3 Core Functions & Compatibility Specifications

Core Functions: Integrated full-process functions including hydraulic valve power amplification, multi-mode closed-loop control, signal acquisition and conditioning, ramp signal generation, valve compensation, bus data interaction and intelligent fault diagnosis. It achieves precise regulation of hydraulic pressure, flow and speed, and supports parameter auto-tuning, zero calibration and dynamic load adaptation to meet various high-precision hydraulic control demands.
Integration Features: The highly integrated module independently completes signal reception, operational adjustment, power amplification, valve drive and fault protection. No additional signal conversion or amplifier modules are required, simplifying wiring, reducing fault points and lowering equipment and maintenance costs.
Compatibility: Fully compatible with all Rexroth proportional valves, servo valves and hydraulic actuators. It connects seamlessly with PLCs, industrial controllers and upper configuration systems of all brands. Supporting mainstream EtherCAT protocol, it adapts to standard automatic control architectures and renovation upgrades of hydraulic equipment.
Reliability & Practicability: Industrial durable design supports 24-hour uninterrupted operation with high stability and negligible long-term parameter drift. Online parameter modification, real-time curve monitoring and fault log query enable maintenance without disassembly, shortening downtime and improving overall production efficiency.

3. Working Principle

System Initialization & Parameter ConfigurationAfter power-on, the module automatically conducts hardware self-test, circuit inspection, bus scanning and port verification, and enters standby state with confirmed normal power supply, loads and communication ports. Operators select control modes and set PID values, ramp time, output amplitude and protection thresholds via local potentiometers or upper software and PLC bus to match on-site valve properties and working conditions.

Command Reception & Signal Processing

The module receives pressure, speed and flow setting commands from upper systems and collects actual operating feedback signals from field sensors simultaneously. Internal high-precision filtering eliminates industrial noise, purifies input signals and calculates deviations between set values and actual operating data accurately.

Closed-loop Calculation & Power Amplification Output

According to preset control modes, the high-speed computing unit executes PID regulation, ramp smoothing, valve compensation and dynamic correction. Output power and driving current are adjusted in real time and amplified by internal power circuits to drive proportional and servo valves accurately. Operational deviations are corrected rapidly to realize steady and precise follow-up control of hydraulic pressure, flow and speed.

Bus Interaction & Data Upload

Real-time data exchange is carried out with upper control systems via EtherCAT bus. Module operating status, output parameters, hydraulic data and fault information are uploaded continuously, while control commands are received instantly to realize remote monitoring, parameter modification and coordinated control of multiple devices.

Real-time Monitoring & Fault Protection

Power voltage, output current, module temperature, bus status, load and signal conditions are monitored throughout operation. Once faults such as overcurrent, overvoltage, overtemperature, short circuit and signal breakage are detected, fault codes will be locked, power output cut off and alarms triggered immediately to protect equipment and prevent fault escalation.

Online Debugging & Maintenance Optimization

Online parameter tuning, real-time waveform observation, zero calibration and dynamic optimization help obtain optimal control parameters for different conditions. Built-in fault log storage facilitates rapid troubleshooting and equipment status analysis for efficient maintenance and continuous performance improvement.

4. Application Scenarios

4.1 Precision Hydraulic Machine Tools

Widely applied in CNC hydraulic machine tools, precision grinders and hydraulic finishing equipment. High-precision closed-loop control accurately adjusts feed speed, cutting pressure and oil flow, improving machining accuracy, product consistency and operational stability to satisfy sophisticated mechanical processing requirements.

4.2 Injection & Die-casting Industry

Suitable for injection molding machines, die-casting machines and rubber molding equipment. It precisely controls pressure and speed during mold clamping, injection, pressure holding, pressure relief and mold opening processes, stabilizing technological parameters and reducing shrinkage, burr and deformation defects so as to raise product yield and production stability.

4.3 Forging & Heavy-duty Hydraulic Machinery

Used on hydraulic presses, forging machines, punching machines and bending machines. Supported by 16A high-current driving capacity, it adapts to heavy-load, high-frequency and high-pressure working conditions, realizing constant pressure control and accurate stroke speed regulation and ensuring safe, stable and evenly powered operation of heavy machinery.

4.4 Industrial Testing & Experimental Equipment

Applicable to hydraulic test benches, fatigue testing machines, pressure inspection devices and precision pressure regulating systems. It achieves high-precision dynamic regulation and steady working condition maintenance of pressure, flow and speed, meeting requirements of accurate data, stable operation and traceable parameters for testing equipment.

4.5 General Industrial Automatic Hydraulic Systems

Applied to automatic hydraulic production lines, hydraulic manipulators, synchronous lifting platforms and intelligent hydraulic control systems. Relying on bus communication and precise closed-loop control, it realizes automatic, intelligent and coordinated equipment operation and improves automation level and overall operational efficiency of production lines.