Bosch Rexroth VT-VSPD-1-20/V0/0-0-1 – Proportional Valve Digital Amplifier Card | VT-VSPD Series
Engineering Background: The VT-VSPD series represents Bosch Rexroth’s advanced generation of plug-in digital amplifier cards engineered for precise closed-loop control of proportional directional and pressure valves in demanding industrial hydraulic systems. Designed to replace legacy analog amplifier technology, the VT-VSPD platform delivers superior signal stability, EMI immunity, and parameterization flexibility required by modern automation architectures.
Product Positioning: The R901077297 / VT-VSPD-1-20/V0/0-0-1 is a single-axis digital amplifier card optimized for integration into Rexroth VT-HACD or compatible rack systems. It serves as the critical interface between PLC command signals and proportional valve solenoids, enabling precise flow and pressure regulation in press, injection molding, metal forming, and mobile hydraulic applications. Procurement engineers sourcing replacement or spare amplifier cards for Rexroth hydraulic systems will find this unit a direct OEM-equivalent solution.
Complete Technical Specifications
| Part Number (OEM) | R901077297 |
| Model / Type | VT-VSPD-1-20/V0/0-0-1 |
| Series / Platform | VT-VSPD (Variable Speed Proportional Drive) |
| Manufacturer | Bosch Rexroth AG |
| Function | Single-axis digital amplifier for proportional directional/pressure valves |
| Supply Voltage | 24 VDC (±10%) |
| Command Input | ±10 V analog / enable signal compatible |
| Output Current | Up to 2.0 A per solenoid channel |
| Control Mode | Digital PWM with integrated ramp generator |
| Enable Input | 24 VDC digital enable (active high) |
| Parameterization | On-board potentiometers / compatible with Rexroth commissioning software |
| Mounting Format | Plug-in card (Euro card format), rack-mount compatible |
| Protection Class | IP20 (card-level, within enclosure) |
| Operating Temperature | 0 °C to +50 °C |
| Storage Temperature | -25 °C to +70 °C |
| EMC Compliance | CE marked, EN 61000 series |
| Weight | Approx. 1,000 g (card + packaging) |
| Country of Origin | Germany / EU |
Proven Application Environments
- Hydraulic Press & Forming Machines – Precise pressure ramp control for tonnage-critical operations
- Plastic Injection Molding – Closed-loop flow control for injection and holding phases
- Metal Cutting & CNC Machining Centers – Stable proportional valve actuation for feed-rate hydraulics
- Steel Mill & Rolling Equipment – High-cycle, high-temperature amplifier card replacement
- Mobile Hydraulics & Construction Equipment – Robust digital control in vibration-prone environments
- Test Bench & Simulation Rigs – Repeatable signal output for R&D and QA hydraulic testing
Engineering Advantages
- Digital PWM Architecture – Eliminates analog drift; maintains consistent solenoid current across temperature and load variations
- Integrated Ramp Generator – Configurable acceleration/deceleration ramps reduce hydraulic shock and valve wear
- OEM Part Number Traceability – R901077297 is a Bosch Rexroth factory-assigned material number ensuring exact BOM compatibility
- Plug-in Card Format – Hot-swap capable within VT-HACD rack; minimizes machine downtime during replacement
- Wide Supply Tolerance – 24 VDC ±10% operation accommodates real-world panel voltage fluctuations
- CE / EMC Certified – Compliant with EU Machinery Directive and industrial EMC standards
System Architecture & Signal Flow
The VT-VSPD-1-20/V0/0-0-1 receives a ±10 V analog command signal from the upstream PLC or motion controller (e.g., Siemens S7, Allen-Bradley ControlLogix, Beckhoff TwinCAT). The on-board digital processor converts this command into a calibrated PWM current output driving the proportional valve solenoid. An integrated enable circuit (24 VDC) provides safe-state control, cutting solenoid current when the enable signal is removed. Ramp parameters (up/down time) are set via front-panel potentiometers or Rexroth commissioning software, allowing fine-tuning without PLC program changes.
Typical signal chain: PLC analog output → VT-VSPD amplifier card → Proportional valve solenoid → Hydraulic actuator
Sourcing & Quality Verification
- All units sourced through verified industrial distribution channels with full OEM part number (R901077297) traceability
- Pre-shipment functional test: supply voltage, enable signal, output current linearity, and ramp function verification
- Original Bosch Rexroth labeling and serial number intact on all units
- Packaging: anti-static ESD bag + foam-lined carton; suitable for international air and sea freight
- Certificate of conformity and test report available upon request for MRO and OEM procurement
Procurement Process
- Confirm Part Number – Verify R901077297 / VT-VSPD-1-20/V0/0-0-1 against your machine BOM or existing card label
- Request Quote – Contact [email protected] for volume pricing, lead time, and availability confirmation
- Place Order – Secure checkout via Konmask.com; T/T wire transfer and major credit cards accepted
- Shipping – DHL / FedEx express worldwide; sea freight available for bulk orders; export documentation provided
- After-Sales – 12-month warranty on verified OEM units; technical support from Konmask engineering team
Technical FAQ
Q: Is R901077297 a direct replacement for older VT-VSPD variants?
A: The VT-VSPD-1-20/V0/0-0-1 is designed for direct plug-in replacement within compatible Rexroth VT-HACD rack systems. Always verify rack slot compatibility and firmware version before installation.
Q: Can this amplifier card be used with non-Rexroth proportional valves?
A: The card outputs a standard PWM current signal compatible with most 24 VDC proportional solenoids. Consult Konmask technical support for cross-compatibility verification.
Q: What is the lead time for R901077297?
A: In-stock units typically ship within 1–3 business days. Contact us for real-time inventory status.
Q: Do you provide a test report or certificate of conformity?
A: Yes. Pre-shipment test reports and CoC documents are available upon request for all OEM units.
Q: What is the warranty policy?
A: All verified OEM units carry a 12-month warranty covering manufacturing defects. DOA units are replaced or refunded within 30 days of receipt.
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