REXROTH VT-VSPA1-1-12 Analog Amplifier For Proportional Valves – VT-VSPA1 Series
When a proportional valve loses its command signal amplification, the entire hydraulic axis goes blind. Pressure builds uncontrolled, actuators drift off-position, and precision manufacturing lines halt — costing thousands per minute in downtime. The analog amplifier card is the nerve center between your PLC output and the proportional solenoid: without a correctly functioning unit, no amount of upstream programming can restore closed-loop hydraulic control. The REXROTH VT-VSPA1-1-12 is that critical link, engineered to deliver stable, repeatable solenoid current even in electrically noisy industrial environments.
Within the Bosch Rexroth VT-VSPA1 amplifier card family, the VT-VSPA1-1-12 is the single-axis, 12 V DC supply variant — the most widely deployed configuration in mobile hydraulics, press control, and injection molding worldwide. Its compact DIN-rail form factor and plug-in terminal design have made it a de-facto standard retrofit card across OEM machine builders in Europe, North America, and Asia. Konmask.com maintains verified stock of this part and ships globally to support both emergency replacements and planned MRO programs.
Technical Specifications
- Manufacturer: Bosch Rexroth (REXROTH)
- Part Number / SKU: VT-VSPA1-1-12
- Series: VT-VSPA1
- Function: Analog amplifier card for single-axis proportional directional / pressure / flow valves
- Supply Voltage: 12 V DC (nominal)
- Output: Proportional solenoid current control (single solenoid)
- Command Input: Analog voltage / current signal from PLC or controller
- Mounting: DIN-rail / panel mount with plug-in screw terminals
- Weight: approx. 300 g
- Origin: Germany (Bosch Rexroth production)
- Condition: New / Surplus New (verified before shipment)
Note: Detailed electrical parameters (ramp times, dither frequency, enable logic) are defined in the official Rexroth VT-VSPA1 data sheet. Contact us for the full technical documentation.
Key Features & Benefits
- Single-axis precision control — dedicated amplifier per axis eliminates cross-channel interference common in multi-axis cards
- 12 V DC supply — directly compatible with mobile machine electrical systems and 12 V panel power rails without additional DC-DC conversion
- Integrated ramp generator — adjustable acceleration / deceleration ramps prevent hydraulic shock on valve opening/closing
- Dither signal output — reduces valve hysteresis and improves positioning repeatability in wear-prone solenoids
- Enable input — hardware enable pin allows safe-state integration with machine safety relays and E-stop circuits
- Plug-in terminal block — card swap without rewiring; minimizes replacement downtime to under 10 minutes
- EMC-hardened design — shielded signal paths maintain stable output in high-frequency drive and servo environments
- LED status indicators — instant visual diagnostics for power, enable, and output states
Industry & Equipment Applications
- Mobile Hydraulics: Agricultural machinery, construction equipment, and forestry vehicles using 12 V electrical systems with proportional boom / blade / bucket control
- Injection Molding Machines: Clamp force and injection speed control via proportional pressure and flow valves on hydraulic presses
- Metal Forming & Press Lines: Servo-hydraulic press control requiring precise ram velocity and force profiling
- Industrial Automation: Hydraulic test benches, fatigue testing rigs, and simulation platforms demanding repeatable force/position output
- Marine & Offshore: Deck machinery and steering systems operating on 12 V DC vessel power
- Material Handling: Proportional lift and tilt control on reach trucks and heavy-duty forklifts
System Integration & Compatible Parts
The VT-VSPA1-1-12 is designed to interface with the full Rexroth proportional valve ecosystem. Typical system bill of materials includes:
- Rexroth 4WRPEH / 4WRPH series proportional directional control valves
- Rexroth DBEM / DREM series proportional pressure-reducing valves
- Rexroth 2FRE / 2FRM series proportional flow control valves
- Rexroth VT-HACD / VT-HNC series digital axis controllers (upstream command source)
- 24 V to 12 V DC-DC converters for panel-power integration in 24 V industrial cabinets
- Shielded multi-core cable (Lapp ÖLFLEX or equivalent) for analog signal wiring
If you are upgrading from an older VT-VSPA1 revision or replacing a failed card in a mixed-generation system, contact our technical team for compatibility confirmation before ordering.
Our Quality Assurance Process
- Source verification: All REXROTH parts are sourced from authorized distributors, OEM surplus channels, or factory-sealed inventory — never grey-market repackaged units
- Visual & label inspection: Each unit is inspected for authentic Rexroth labeling, date codes, and housing integrity before listing
- Functional pre-check: Where test equipment is available, amplifier cards are bench-powered and output-verified prior to shipment
- Anti-static packaging: ESD-safe bags and foam-lined cartons protect sensitive electronics during international transit
- Traceability: Lot numbers and inspection records are retained for 12 months post-shipment
How to Order
- Submit an RFQ via the “Get a Quote” button or email support@konmask.com
- Include your required quantity, delivery timeline, and destination country
- Receive a formal quotation with lead time, shipping options (DHL / FedEx / sea freight), and payment terms within 24 hours
- Confirm order — we issue a proforma invoice and arrange export documentation (commercial invoice, packing list, COO if required)
- Shipment dispatched with full tracking; typical international transit 3–7 business days via express courier
Why Choose Konmask.com?
- Industrial automation specialists — we focus exclusively on PLC, DCS, drives, and hydraulic control components; no generalist catalog noise
- Global B2B shipping — export experience to 60+ countries with full customs documentation support
- Technical pre-sales support — our engineers can confirm compatibility, cross-reference obsolete part numbers, and advise on system integration
- Competitive MRO pricing — volume discounts available for maintenance contracts and OEM production runs
- Responsive communication — RFQ responses within 24 hours; urgent same-day quotation available on request
Frequently Asked Questions
Q: What is the difference between VT-VSPA1-1-12 and VT-VSPA1-1-24?
A: The suffix denotes the supply voltage — 12 V DC vs. 24 V DC. Both cards perform the same amplification function; select based on your cabinet power rail voltage. Do not interchange supply voltages as this will damage the card.
Q: Can this card control a double-solenoid proportional valve?
A: No. The VT-VSPA1-1-xx is a single-solenoid (single-axis) amplifier. For double-solenoid valves requiring differential current control, the VT-VSPA2 series is the correct selection.
Q: Is this a new or refurbished unit?
A: Konmask.com supplies new and surplus-new units. Condition is confirmed in the quotation. We do not supply repaired or refurbished cards without explicit disclosure.
Q: Do you provide the Rexroth technical data sheet?
A: Yes. The official VT-VSPA1 data sheet (RE 30 257) is available upon request with your RFQ.
Q: What is the lead time for VT-VSPA1-1-12?
A: In-stock units ship within 1–2 business days. If sourcing is required, typical lead time is 5–15 business days depending on origin. Exact availability is confirmed at quotation stage.
Q: Can you supply a Certificate of Origin for customs clearance?
A: Yes. We provide full export documentation including commercial invoice, packing list, and Certificate of Origin (Germany) upon request.
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