Rexroth VT5006S12R5 – Proportional Valve Amplifier Card | VT-5006 Series
Engineering Background
The Rexroth VT-5006 series represents Bosch Rexroth’s mature platform for proportional hydraulic valve control, engineered for demanding industrial environments where precise, repeatable electrohydraulic actuation is non-negotiable. The VT5006S12R5 is the 12 VDC supply variant with integrated ramp and dither functions, designed for direct plug-in to Rexroth Euro-card racks or standalone DIN-rail enclosures.
Product Positioning
This amplifier card bridges the gap between a PLC analog output (±10 V or 4–20 mA command signal) and a Rexroth proportional directional or pressure valve solenoid, delivering closed-loop-ready current control with on-board diagnostics. It is the preferred choice for OEM machine builders and MRO replacement in press, injection-molding, and mobile-hydraulics applications.
Complete Technical Specifications
| Parameter | Value |
|---|---|
| Part Number | VT5006S12R5 / VT5006S12 |
| Series | VT-5006 |
| Manufacturer | Bosch Rexroth AG |
| Supply Voltage | 12 VDC (±15 % tolerance) |
| Command Input | ±10 V differential / 4–20 mA selectable |
| Output Current (max) | Up to 3 A continuous per solenoid channel |
| Solenoid Channels | 2 (A / B, for directional valves) |
| Ramp Function | Independent ramp-up / ramp-down, 0.05–5 s adjustable |
| Dither Frequency | 50–200 Hz, amplitude adjustable via potentiometer |
| Enable Input | 24 VDC digital enable (active high) |
| Fault Output | Open-collector, solenoid wire-break / short-circuit detection |
| Form Factor | Euro-card 100 × 160 mm, DIN 41494 |
| Connector | DIN 41612 Type F 32-pin rear connector |
| Operating Temperature | 0 °C to +55 °C |
| Storage Temperature | −25 °C to +70 °C |
| Protection Class | IP 00 (card); IP 54 with enclosure |
| Weight | approx. 280 g |
| Certifications | CE, UL recognized component |
| Replacement / Cross-ref | VT5006S12, VT-5006-S-12-R5 |
Proven Application Environments
- Hydraulic Press & Forging: Precise ram-speed and pressure profiling via ramp control eliminates shock loads on tooling.
- Injection Molding Machines: Smooth velocity transitions during injection and hold phases improve part quality and reduce cycle time.
- Mobile Hydraulics & Crane Control: 12 VDC supply matches vehicle electrical systems; dither minimizes valve hysteresis for smooth boom actuation.
- Steel Mill Roll-Gap Control: High-current output drives large-frame proportional valves with fast dynamic response.
- Test Bench & Simulation Rigs: Analog command compatibility with standard DAQ outputs enables rapid integration into automated test systems.
- MRO Replacement: Drop-in replacement for failed VT5006S12 cards in existing Rexroth rack installations — no rewiring required.
Engineering Advantages
- Integrated Ramp Generator: Independent up/down ramp potentiometers prevent hydraulic shock without external PLC programming overhead.
- Dither Superimposition: Reduces static friction (stiction) in proportional valve spools, improving linearity and repeatability to <0.5 % hysteresis.
- On-Board Diagnostics: Wire-break and short-circuit detection with fault relay output simplifies machine safety integration and reduces downtime.
- Universal Command Input: Accepts both voltage (±10 V) and current (4–20 mA) command signals — compatible with virtually all PLC analog output modules.
- Euro-card Standard: Plug-in replacement in any Rexroth VT-VSPA or compatible rack; no custom mounting hardware required.
- Compact Footprint: 100 × 160 mm card occupies a single rack slot, preserving panel space in dense control cabinets.
System Architecture & Signal Flow
The VT5006S12R5 operates as a current-controlled amplifier within a standard electrohydraulic control loop:
- PLC Analog Output → ±10 V or 4–20 mA command signal to card input terminals.
- Enable Signal → 24 VDC digital input activates the output stage; de-energizing provides safe valve centering.
- Ramp & Dither Processing → On-board circuitry shapes the command: ramp limits slew rate; dither superimposition reduces valve hysteresis.
- PWM Current Driver → High-efficiency PWM output stage delivers regulated solenoid current (A or B channel) proportional to command.
- Proportional Valve Solenoid → Spool position follows current command, metering hydraulic flow to actuator.
- Fault Monitoring → Continuous solenoid circuit monitoring; fault output signals PLC safety input on wire-break or short-circuit.
Sourcing & Quality Verification
- Origin: Sourced from authorized Rexroth distribution channels and verified OEM surplus inventory.
- Inspection: Every unit undergoes incoming inspection — label verification, connector integrity check, and functional power-on test before dispatch.
- Authenticity: Rexroth holographic labels and date codes are verified. Counterfeit units are rejected at intake.
- Condition: New-in-box (NIB) and tested-surplus (TS) stock available — condition clearly stated on each listing.
- Warranty: 12-month warranty against manufacturing defects; DOA replacement within 7 days of receipt.
- Documentation: Rexroth datasheet RE 29 929 and wiring diagram available upon request.
Procurement Process
- Confirm Part Number: Verify VT5006S12R5 against your machine’s rack label or existing card — check supply voltage (12 V) and revision suffix (R5).
- Request Quote: Contact support@konmask.com for volume pricing, lead time, and condition (NIB / TS) availability.
- Place Order: Add to cart and complete checkout, or submit a purchase order for B2B net-terms arrangements.
- Shipping: DHL / FedEx express available worldwide; export documentation (commercial invoice, packing list, HS 8537.10) included.
- Receive & Install: Plug card into rack slot, connect DIN 41612 rear connector, apply enable signal, and commission per Rexroth RE 29 929 procedure.
Technical FAQ
Q: Is VT5006S12R5 compatible with 24 VDC supply systems?
A: No. The S12 suffix denotes 12 VDC supply. For 24 VDC systems, specify VT5006S24R5. Contact us to confirm availability.
Q: Can this card drive two independent proportional valves simultaneously?
A: The card provides two solenoid output channels (A and B) intended for a single directional valve. Driving two independent valves requires two separate amplifier cards.
Q: What is the difference between VT5006S12 and VT5006S12R5?
A: R5 denotes revision 5, incorporating updated PWM driver ICs and improved EMC filtering. The R5 revision is the current production standard and is backward-compatible with earlier revisions.
Q: How do I set the ramp time?
A: Ramp-up and ramp-down times are set independently via two multi-turn potentiometers (P3, P4) on the card face. Range is 0.05–5 s. Refer to Rexroth RE 29 929 Section 5 for calibration procedure.
Q: What happens if a solenoid wire breaks during operation?
A: The on-board fault detection circuit opens the fault relay output within <50 ms, allowing the PLC safety input to initiate a controlled shutdown. The valve defaults to its spring-centered (fail-safe) position.
Q: Do you provide Rexroth RE 29 929 documentation?
A: Yes. The datasheet and wiring diagram are available as a free download upon order confirmation. Contact support@konmask.com to request pre-sale copies.
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