Bosch Rexroth WV60 Series Modules

Technical Dossier

Product Details And Specifications

Bosch Rexroth WV60 Series: Comprehensive Module Range and Technical Overview

The Bosch Rexroth WV60 series represents a mature generation of proportional valve controllers and amplifier cards engineered for closed-loop electrohydraulic control in heavy industrial environments. Deployed extensively across chemical processing plants, nuclear power facilities, offshore platforms, and petroleum refineries, the WV60 platform provides analog command signal conditioning, ramp generation, enable logic, and valve-specific calibration outputs for Rexroth proportional directional control valves and pressure/flow control valves. Its DIN-rail and rack-mount form factors made it a standard integration component in legacy Siemens, ABB, and Yokogawa DCS architectures throughout the 1990s and 2000s. The series remains in active service at facilities with long equipment replacement cycles, making reliable spare parts sourcing a critical operational requirement.

The Evolution of WV60 Architecture

The WV60 series was introduced by Bosch Rexroth (formerly Mannesmann Rexroth) as part of its VT-series analog amplifier card family. Early variants such as the WV60-RGC1 provided single-axis proportional control with fixed ramp timing and manual potentiometer calibration. The WV60-RGC2 introduced dual-channel command input switching and improved EMC shielding, addressing interference issues encountered in high-voltage switchgear environments. Subsequent revisions incorporated enable input logic compatible with 24 VDC PLC outputs, replacing earlier relay-based enable circuits.

The WV60 architecture is fundamentally analog: command signals are typically ±10 VDC or 4–20 mA, processed through internal op-amp stages before driving the valve solenoid coil via a PWM output stage. This design predates fieldbus-native amplifier cards (such as the later VT-HACD and VT-VSPA2 series with PROFIBUS/EtherNet/IP interfaces). Facilities migrating to digital DCS platforms must bridge WV60 cards via analog I/O modules, a configuration that remains common in brownfield retrofit projects. Compatibility with original Rexroth 4WRE, 4WRKE, and DBET valve families is preserved across all WV60 sub-variants, provided solenoid coil resistance and inductance ratings are matched.

The WV60 series entered the mature/end-of-life phase of its product lifecycle. Bosch Rexroth has transitioned new designs to the VT-VSPA2, VT-HACD, and VT-MRPA digital amplifier platforms. However, WV60 cards continue to be required for installed base maintenance, and direct digital replacements require valve-side modifications. DriveKNMS maintains stock and repair capability for the full WV60 range to support lifecycle extension programs.

WV60 Full Catalog & Functionalities (SKU List)

The following SKUs represent verified models within the Bosch Rexroth WV60 / VT-series analog amplifier card family. Models are classified by function:

Proportional Valve Amplifier Cards (Single & Dual Channel)

• WV60-RGC2: Dual-input proportional valve amplifier, ±10 VDC command, 24 VDC enable, DIN rail
• WV60-RGC1: Single-channel proportional amplifier card, manual ramp pot, fixed PWM frequency
• VT-VSPA1-1-1X/V0/0: Single-axis proportional amplifier, analog command, integrated ramp generator
• VT-VSPA2-1-1X/V0/T1: Dual-axis proportional amplifier with enable logic and fault output relay
• VT-VSPA2-50-1X/V0/0: High-current output variant for large-bore valve solenoids up to 3.0 A

Ramp Generator & Signal Conditioning Modules

• VT-SR2-1X/1: Analog ramp generator card, adjustable acceleration/deceleration, ±10 VDC I/O
• VT-SR2-1X/2: Dual-ramp variant with independent up/down ramp time potentiometers
• VT-SWKD-1-1X/V0: Command signal selector and switching card for multi-setpoint applications

Proportional Pressure & Flow Control Amplifiers

• VT-MSPA1-1-1X/V0/0: Proportional pressure reducing valve amplifier, 4–20 mA or ±10 VDC input
• VT-MSPA2-1-1X/V0/0: Dual-channel pressure control amplifier with integrated setpoint memory
• VT-HACD-1-1X/V0/0-0-008: Digital proportional amplifier with CANopen interface, replaces analog VT series

Enable Logic & Safety Interface Cards

• VT-SSPA1-1-1X/V0/0: Safety amplifier card with SIL 2 enable channel monitoring
• VT-SWKD-2-1X/V0: Multi-axis command distribution card, up to 4 output channels

Power Supply & Bus Interface Modules

• VT-NE30-1X/1: 24 VDC regulated power supply card for VT/WV60 rack systems
• VT-NE30-1X/2: Dual-output power supply with short-circuit protection and status LED
• VT-MRPA1-1-1X/V0/0: Multi-axis rack controller with analog bus backplane for up to 8 amplifier cards

Sourcing Hard-to-Find & Obsolete WV60 Parts

DriveKNMS operates as a specialist distributor and repair center for discontinued Bosch Rexroth analog amplifier cards, including the full WV60 and VT-series range. As Bosch Rexroth has formally discontinued production of WV60-series cards, procurement through standard distribution channels is no longer viable. DriveKNMS sources units through certified secondary market channels, decommissioned plant asset recovery, and direct manufacturer surplus. All units are individually inspected and tested prior to dispatch.

For facilities operating under long-term maintenance contracts or regulatory frameworks that prohibit valve-side hardware modifications (common in nuclear and petrochemical sectors), WV60 card replacement-in-kind is the only compliant option. DriveKNMS maintains a dedicated inventory buffer for these applications and can provide documentation packages including test reports and traceability records on request.

Quality Control for the WV60 Range

Each WV60-series card processed by DriveKNMS undergoes a structured functional verification protocol prior to shipment. The test sequence covers: input signal conditioning verification across the full ±10 VDC command range; ramp generator timing accuracy measured against factory specification tolerances; PWM output frequency and duty cycle verification under resistive load equivalent to target valve solenoid impedance; enable input logic threshold testing at 18 VDC, 24 VDC, and 30 VDC; and solenoid driver output current linearity check across 0–100% command range. Cards exhibiting drift in op-amp offset voltage, degraded PWM transistor switching characteristics, or corroded backplane connector pins are rejected or routed to component-level repair before re-test. Test data is retained for a minimum of 24 months and is available to customers upon request.