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3. Key Technical Specifications
| Parameter | Value |
|---|---|
| Operating Voltage | 24 V DC (approx. 21.6–33.6 V) |
| Current Consumption | Typical 0.6 A; max 1.25 A |
| Regulated Output | ±9 V ±1% |
| Card Dimensions | 100 × 160 mm (Eurocard) |
| Connector | 32-pin DIN 41612, form D |
| Clock / Oscillator | Self-clocking up to 1.5 kHz; 2.5 kHz ±10% |
| Ramp Time | Adjustable 30 ms to 5 s |
| Operating Temperature | 0 to 50 °C |
| Weight | Approx. 0.15 kg |
| Primary Application | Flow control of A4VSO / A4VSG / A4CSG pumps |
4. Product Introduction & Supply Chain Strategy
The Bosch Rexroth Indramat VT5035-17B is an electrical amplifier card designed for precise flow control of proportional valves on axial piston variable displacement pumps (primarily A4VSO and A4VSG series). It provides command value inputs, ramp generation, swivel-angle control, and dual clocked current output stages for reliable hydraulic system performance.
Securing this card as New Surplus protects Total Cost of Ownership on installed hydraulic power units. Genuine new-surplus units eliminate the risk of intermittent failures common with refurbished amplifier cards (degraded components, drifted calibration). Because availability is limited, holding 1–2 units of buffer stock is the practical approach to avoid extended downtime and high emergency procurement costs.
5. Installation & Configuration Guide
Stage 1: Pre-Installation (Prep & Safety)
Perform full lock-out/tag-out on the hydraulic power unit and control cabinet. Wear a grounded ESD wrist strap. Photograph the existing card’s front-panel potentiometer settings, LED indicators, and wiring to the DIN 41612 connector. Confirm the replacement is New Surplus and free of damage.
Stage 2: Removal
Power down the control supply. Carefully extract the card from its Eurocard holder or rack, labeling any external connections if present.
Stage 3: Installation (Clone & Seat)
Set the potentiometers (command values, ramp time) to match the original card settings as closely as possible. Insert the new VT5035-17B firmly into the 32-pin DIN 41612 connector, ensuring full seating. Secure any front-panel fasteners.
Stage 4: Power-On & Testing
Restore control power. Verify the “Ready for operation” LED and enable status. Check regulated ±9 V outputs and confirm correct response of the proportional valve / pump swivel angle under controlled command values before returning the system to automatic operation.
VT5035-17B
VT5035-17B
6. Firmware/Software Versions & Upgrade Notes
This is an analog amplifier card with no user-accessible firmware. All control functions are hardware-based (potentiometers, relays, and fixed oscillator).
Document the original potentiometer settings and any jumper configurations before replacement. Do not interchange cards with significantly different calibration without re-tuning the system. No software upgrade is required or possible; performance depends on correct hardware configuration and valve matching.
7. Frequently Asked Questions (FAQ)
Q: Is this truly New Surplus or refurbished?
A: Brand New Surplus only. Original manufacturing, unused, with zero operating hours. Not pulled or repaired.
Q: Why is the price higher than used cards but lower than current OEM list (where available)?
A: Pricing reflects genuine New Surplus inventory of a limited-availability amplifier card. It avoids the reliability risk of refurbished electronics while remaining below typical emergency pricing.
Q: Is the VT5035-17B still in active production?
A: Availability is limited / legacy. Strategic buffer stock of 1–2 units is recommended for plants operating A4VSO or A4VSG systems that use this amplifier.
Q: Can the card be hot-swapped?
A: No. Always remove power from the control cabinet before insertion or removal. Live replacement risks damage to the card and connected valves.
Q: Will the new card require re-tuning of the hydraulic system?
A: In most cases the original potentiometer settings can be transferred. Perform a functional test of pump flow response and verify stable operation before returning the system to production.
Q: What warranty is provided?
A: Standard 1-year warranty covering manufacturing defects. Visual inspection and basic power-on verification are performed prior to shipment.
Q: Do you support last-time-buy or multi-site consolidation for this amplifier card?
A: Yes. For facilities running multiple hydraulic systems with VT-5000 series cards we can coordinate consolidated New Surplus holdings to minimize total carrying cost while protecting against stock-outs.
