Bosch Rexroth VT-11034-11 – Servo Valve Amplifier Card for Precise Hydraulic Motion Control

The Bosch Rexroth VT-11034-11 is a plug-in servo valve amplifier card designed for high-precision hydraulic applications. From my experience, it’s commonly used with torque-motor servo valves in presses, test stands, injection molding, and metal forming lines where smooth, repeatable motion is a must. You might notice that it balances ease of setup (gain, ramp, dither, and zero adjustments are all accessible) with the rock-solid stability you expect from Rexroth’s VT series.

One thing I appreciate is how predictable the output current control is—typically a bipolar current drive for the valve’s torque motor—so you get clean spool movement without hunting. In most cases, it drops straight into a VT 3000-series rack with a 32-pin DIN connector, making retrofits painless when an older card needs replacing.

Our Order Placement Process and Guarantees

• Warranty: 365 days from delivery
• Lead time: In-stock items ship in about 1 week; no more than one month at the latest
• Payment: 50% advance payment; full payment prior to delivery
• Express options: FedEx, UPS, DHL

Key Features

• Analog command input (typically ±10 V) – straightforward integration with PLC/DCS analog outputs for position, pressure, or velocity loops.
• Bipolar current output to torque-motor servo valves – stable, low-ripple drive current for smooth spool control; helps reduce oscillation in sensitive loops.
• Adjustable gain, ramp, and zero – quick tuning at the panel; you can trim response and set a precise null without specialized tools.
• Dither (frequency and amplitude) – typically used to overcome static friction in the valve, improving low-speed resolution.
• Eurocard plug-in format – fits Rexroth VT 3000-series subracks; service-friendly swap with minimal downtime.
• Diagnostic points and status indication – simple monitoring during commissioning or troubleshooting.

Technical Specifications

Related or Supporting Products

• Bosch Rexroth VT 3002-1X/32D subrack – card holder/backplane for VT-series amplifier cards; makes field replacement fast and tidy.
• Bosch Rexroth VT 3002 power supply module – stabilized 24 V DC distribution for multiple cards in the rack.
• Bosch Rexroth VT-11031 / VT-11032 / VT-11033 – related amplifier cards with different current ranges and tuning options; VT-11034-11 typically supports bipolar current drive with extended adjustability.
• Bosch Rexroth VT-HACD-1X digital controller – a modern alternative when you want parametrization via software and advanced motion functions; useful for upgrades where diagnostics are a priority.

Installation & Maintenance

Install the VT-11034-11 in a suitable 19″ control cabinet with proper ventilation. Keep ambient temperature within the specified range and route shielded analog cables away from power lines. Grounding and shielding are critical—tie shields at one end to avoid ground loops, and use the recommended 32-pin DIN connector.

• Power down before inserting or removing cards to protect the torque motor and the amplifier.
• Set initial gain and ramp conservatively; then tune under load while watching response and current draw.
• Use dither sparingly—typically you only need enough to overcome stick-slip without adding noise to the loop.

Routine care is simple: clean dust from the rack, check terminal tightness and the card’s seating, and verify zero offset after valve service. There’s no firmware on this analog card, so “updates” aren’t a thing, but periodic recalibration (gain/null) keeps it consistent. A maintenance lead at a plastics plant told us they swapped to a VT-11034-11 to stabilize a servo valve on a molding press; after trimming the zero and adding a touch of dither, the low-speed drift they had was gone.

Quality & Certifications

• CE compliant industrial control product
• Manufactured under ISO 9001 quality systems (Bosch Rexroth)
• RoHS conformity in many cases for current production and service stock
• Warranty: 365 days from delivery