Bosch Rexroth VT-HACD-1-14/V0/1-0-0 Replacement for VT-HACD Series

Product Overview

Bosch Rexroth VT-HACD-1-14/V0/1-0-0 Replacement for VT-HACD Series: Smooth Transition & Legacy System Compatibility

The Bosch Rexroth VT-HACD-1-14/V0/1-0-0 (R900745354) is a high-performance hydraulic axis control card engineered for closed-loop electrohydraulic positioning and velocity control in demanding industrial environments. As legacy Rexroth VT-HACD Series installations age and original units reach end-of-service life, facilities managers and automation engineers increasingly require a verified, drop-in replacement that preserves existing wiring infrastructure, retains compatibility with incumbent servo valves, and avoids costly re-engineering of the hydraulic control cabinet.

This listing provides a fully tested, ready-to-ship replacement unit for the VT-HACD-1-14/V0/1-0-0, sourced and inspected to meet OEM functional specifications. Whether your application involves press control, injection molding, metal forming, or heavy-duty positioning systems, this card restores axis control performance without requiring changes to your existing Rexroth proportional valve wiring or PLC command interface.

Compatibility Comparison Table

Seamless Upgrade Solutions

A successful VT-HACD-1-14/V0/1-0-0 retrofit rarely involves the axis control card alone. In most hydraulic control cabinet upgrades, engineers simultaneously address the surrounding system components to ensure long-term reliability and reduce future unplanned downtime.

When replacing the VT-HACD card, it is common practice to inspect and, where necessary, replace the associated Rexroth proportional directional control valve — typically a 4WRPH or 4WRKE series proportional valve — since valve solenoid wear is often the root cause of axis instability that initially appears as a card fault. The VT-HACD-1-14/V0/1-0-0 is designed to drive these valves directly, and the solenoid current output parameters are pre-matched to the Rexroth proportional valve family.

Many installations also benefit from simultaneously upgrading the Rexroth VT-VSPA2 or VT-VSPA1 amplifier cards that govern adjacent hydraulic axes within the same control cabinet. Standardizing all axis cards to the same firmware revision eliminates cross-axis tuning inconsistencies and simplifies spare parts inventory management.

For systems using a Rexroth HNC100 or HNC101 hydraulic numerical controller as the supervisory motion controller, the VT-HACD-1-14/V0/1-0-0 integrates directly into the existing analog command architecture without requiring changes to the HNC axis parameterization files. This preserves the investment in existing motion programs and reduces commissioning time significantly.

Where the hydraulic control cabinet also houses a Rexroth VT-SR2 or VT-SR3 ramp generator module, these units can remain in service alongside the replacement VT-HACD card, as the analog signal chain is fully compatible. Similarly, Rexroth VT-SWKD or VT-SWKT signal conditioning modules installed upstream of the axis card do not require replacement or recalibration during the card swap.

For facilities transitioning from older Rexroth VT-2000 or VT-3000 series analog amplifier cards to the VT-HACD platform, the migration typically involves remapping the ±10 V command signal from the supervisory PLC — whether a Siemens S7-300, S7-400, or equivalent — and verifying that the analog output module resolution is sufficient for the required positioning accuracy. No changes to the PLC program logic are required beyond scaling the analog output range.

Power supply integrity is critical in hydraulic axis control applications. Before commissioning the replacement card, it is advisable to verify the ±15 V DC auxiliary power supply — often a Rexroth VT-NE30 or equivalent regulated PSU — is within specification, as supply voltage deviation is a leading cause of premature axis card failure in high-cycle press and forming applications.

Retrofit Guidance FAQ

Q: Can I replace the VT-HACD-1-14/V0/1-0-0 without rewiring the control cabinet?
A: Yes. The replacement unit uses the same connector pinout and signal levels as the original. Retain all existing wiring to the proportional valve solenoid, position feedback transducer, enable signal, and analog command input. No rewiring is required for a standard like-for-like swap.

Q: Do I need to modify my PLC program after installing the replacement card?
A: No PLC program changes are required. The VT-HACD-1-14/V0/1-0-0 accepts the same ±10 V analog command signal from your existing PLC analog output module. Axis scaling and ramp parameters are set via the card’s onboard potentiometers, not via the PLC.

Q: What commissioning steps are required after card replacement?
A: After physical installation, verify the zero-offset and gain potentiometer settings match the values recorded from the outgoing card (or the original commissioning sheet). Perform a slow-speed axis movement test before returning to full production speed. Check valve dither frequency and amplitude settings if axis hunting is observed.

Q: Is the replacement card compatible with LVDT position feedback?
A: Yes. The VT-HACD-1-14/V0/1-0-0 accepts LVDT and analog DC position transducer feedback signals. Verify the feedback signal range matches the card’s input specification before commissioning.

Q: What if my original card has a different sub-revision suffix?
A: Minor revision differences within the VT-HACD-1-14 family are generally functionally equivalent. Contact TOPNLMS with your original part number and R-number for confirmation before ordering if you are uncertain.

Q: How do I minimize downtime during the card replacement?
A: Pre-configure the replacement card’s potentiometers to match the outgoing unit’s settings before the maintenance window. Have the replacement unit on-site and bench-tested before scheduling the shutdown. TOPNLMS ships from Xiamen with express freight options to minimize lead time.

Warranty Assurance

Every VT-HACD-1-14/V0/1-0-0 R900745354 unit supplied by TOPNLMS is covered by a 12-month warranty from the date of shipment. Prior to dispatch, each unit undergoes functional output testing, solenoid driver verification, and power supply rail checks to confirm it meets the operational parameters required for hydraulic axis control applications.

In the event of a warranty claim, TOPNLMS provides replacement unit dispatch or repair support with a target response time of 1–2 business days. Our after-sales team is reachable directly at [email protected] or +86 18359293191 for technical pre-sales consultation, compatibility confirmation, and post-installation support.

Units are packaged in anti-static protective packaging with foam cushioning suitable for international air and express freight. Export documentation, including commercial invoice and packing list, is prepared to facilitate smooth customs clearance for international buyers.

Stock availability is maintained for fast dispatch. Buyers are encouraged to confirm current stock status and lead time directly with our sales team, particularly for urgent breakdown replacement requirements where minimizing production downtime is the primary procurement objective.