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Key Technical Specifications
- Product Model: VT-MVTW-1-16/D
- Manufacturer: Bosch Rexroth
- Product Family: MVTW Analog Valve Amplifiers
- Output Current: 0 to ±16 A (continuous), suitable for high-flow proportional valves
- Input Signal: ±10 V analog command (differential or single-ended)
- Power Supply: 24 VDC (18–32 VDC operating range)
- Valve Compatibility: Designed for Rexroth 4WRTE, 4WRKE, and similar 2-coil proportional directional valves
- Control Features: Adjustable ramp up/down (via potentiometer or external signal), deadband compensation, dither frequency selection
- Protection Functions: Short-circuit, overload, overtemperature, and open-circuit detection with status LED indication
- Mounting: Standard 35 mm DIN rail (EN 60715)
- Environmental Rating: IP20, operating temperature 0°C to +50°C
Core Performance and Selection Advantages
The VT-MVTW-1-16/D offers a compelling balance of simplicity, robustness, and performance for hydraulic motion control in mid-complexity applications. Its key advantage lies in delivering high-current, stable valve drive without the complexity—and cost—of digital communication interfaces, making it ideal for projects where PLCs provide only analog outputs or where deterministic response outweighs the need for advanced diagnostics.
Performance-wise, the amplifier provides precise current regulation with low ripple (<2%), ensuring smooth valve spool positioning and minimizing pressure shocks in hydraulic circuits. The ±16 A output capability supports large-bore or high-flow valves used in heavy machinery, while the adjustable ramps allow tuning of acceleration/deceleration profiles to match mechanical load dynamics—reducing wear and improving cycle times.
Functionally, the module includes practical features often missing in basic amplifiers: selectable dither frequencies (to prevent valve stiction), manual offset adjustment for valve null correction, and visual fault indication via front-panel LEDs. These reduce commissioning time and support troubleshooting without specialized tools.
From a total cost of ownership (TCO) perspective, the VT-MVTW-1-16/D lowers project costs by eliminating the need for external signal conditioners or relay logic for valve enable. Its compact width (only 22.5 mm) maximizes panel space efficiency, and its compatibility with legacy analog control architectures allows seamless integration into both new builds and hybrid modernization projects. For OEMs producing standardized machine families, this amplifier provides a reliable, field-proven solution with minimal software dependency.
VT-MVTW-1-16 D REXROTH
System Integration and Expandability
Integration into automation systems is straightforward due to its pure analog interface. It connects directly to standard ±10 V analog outputs from PLCs (Siemens, Allen-Bradley, etc.) or motion controllers, requiring no proprietary software for basic operation—though Rexroth provides optional setup guides for optimal tuning.
While it does not support industrial Ethernet protocols (e.g., PROFINET, EtherNet/IP), this is intentional: the design targets applications where hardwired analog control ensures deterministic behavior unaffected by network latency or cybersecurity constraints. However, for systems requiring remote monitoring, the fault output can be wired to a digital input on the PLC to signal amplifier health.
Expandability is addressed through modular parallel operation: multiple VT-MVTW units can be installed side-by-side on a single DIN rail to control multi-axis hydraulic systems. Each operates independently, simplifying system scaling. Additionally, the amplifier’s compatibility with a wide range of Rexroth proportional valves—including those with position feedback (when used with external controllers)—allows flexible hydraulic circuit design.
For future-proofing, Bosch Rexroth maintains pin and function compatibility across the MVTW series, so even if a project later requires higher current (e.g., VT-MVTW-1-20/D), the same mounting footprint and wiring scheme apply—minimizing redesign effort. This makes the VT-MVTW-1-16/D a pragmatic choice for integrators prioritizing reliability, serviceability, and lifecycle continuity in hydraulic motion applications.
