VACON NX Series Control Boards

Technical Dossier

Product Details And Specifications

VACON NX Series: Comprehensive Control Board Range and Technical Overview

The VACON NX series of AC drives and associated control/option boards represents one of the most widely deployed variable frequency drive (VFD) platforms in global heavy industry. Installed across petrochemical refineries, nuclear power auxiliary systems, offshore platforms, pulp and paper mills, and municipal water treatment facilities, the NX architecture has accumulated a multi-decade installed base that continues to demand active spare parts support. The NX platform spans power ranges from 0.55 kW to several megawatts, with a modular board architecture that separates control logic, I/O expansion, fieldbus communication, and power supply functions into discrete, field-replaceable assemblies. This modularity is the primary reason the NX series remains a preferred platform for lifecycle extension programs in facilities where full drive replacement is cost-prohibitive or operationally disruptive.

The Evolution of VACON NX Architecture

The VACON NX platform was introduced in the early 2000s as a successor to the VACON CX and earlier drive families. The initial NXS (standard) and NXP (performance) variants established a common hardware backbone: a control board handling parameter storage, keypad interface, and basic I/O, supplemented by option boards occupying dedicated slots (OPT-A through OPT-D on most frames). Early firmware revisions (pre-V7) used proprietary VACON fieldbus protocols; subsequent releases added native PROFIBUS-DP, CANopen, DeviceNet, Modbus RTU, and EtherNet/IP support through dedicated option boards. The NXI (industrial) and NXL (lite) sub-families followed, targeting specific market segments with reduced option slot counts. Danfoss acquired VACON in 2014; post-acquisition, the NX platform continued under the VACON brand with Danfoss part numbering cross-references introduced for procurement alignment. The NX series is now in a mature/end-of-active-development phase. Danfoss has positioned the VLT AutomationDrive FC 302 and the VACON 100 series as forward migration paths, but NX hardware remains in production for spare parts and select OEM channels. For end users with NX drives installed in safety-critical or continuous-process applications, DriveKNMS provides long-term maintenance sourcing as an alternative to full system replacement.

VACON NX Full Catalog & Functionalities (SKU List)

The following SKUs represent verified, commonly sourced components within the VACON NX ecosystem. Each entry reflects a discrete, field-replaceable board assembly.

Control & CPU Boards

• PC00002: NX main control board, standard I/O configuration, EPROM-based parameter storage
• PC00003: NX control board variant with extended analog I/O capacity for process control applications
• PC00061: NX control board assembly, revised hardware revision with improved EMC filtering
• PC00061B: Updated variant of PC00061 with modified component sourcing, backward-compatible firmware
• PC00094: NX control board for NXP performance series, supports encoder feedback interface
• PC00252: NX series control/option board assembly; used in mid-frame NXS/NXP drives for I/O and logic functions
• PC00259: NX control board with integrated keypad interface circuitry, frame-specific variant

I/O Expansion & Option Boards

• PC00098: Digital I/O expansion board, OPT-slot compatible, 8DI/4DO configuration
• PC00131: Analog I/O option board, ±10V and 4–20mA inputs/outputs, OPT-A/B slot
• PC00226: Relay output option board, 3 x SPDT relay contacts, 250VAC rated
• PC00270: Thermistor/PTC input option board for motor thermal protection integration
• PC00271: Encoder interface option board, HTL/TTL input, for closed-loop speed control
• PC00272: Resolver interface option board for high-accuracy positioning applications

Fieldbus Communication Boards

• PC00285: PROFIBUS-DP option board (OPT-slot), supports DP-V0 and DP-V1 services
• PC00301: CANopen option board, DS402 drive profile, OPT-slot compatible
• PC00302: DeviceNet option board, Group 2 server, explicit and I/O messaging

Sourcing Hard-to-Find & Obsolete VACON NX Parts

As the NX series transitions from active production to lifecycle support status, procurement of specific board assemblies through standard distribution channels becomes progressively unreliable. Discontinued part numbers, extended lead times, and minimum order quantity constraints from authorized distributors create operational risk for facilities dependent on NX hardware. DriveKNMS maintains a dedicated inventory of NX control boards, option boards, and power assemblies sourced through verified secondary market channels, including decommissioned equipment, OEM overstock, and authorized refurbishment programs. All sourced units are cross-referenced against VACON and Danfoss part number databases to confirm compatibility before dispatch. For obsolete SKUs no longer available through any active channel, DriveKNMS offers board-level repair assessment and, where applicable, component-level restoration to extend service life. Customers operating NX drives in continuous-process environments are advised to establish a consignment or buffer stock arrangement to mitigate unplanned downtime risk.

Quality Control for the VACON NX Range

VACON NX control and option boards incorporate multi-layer PCB designs with dense SMD component populations and proprietary ASIC elements that require specialized test procedures beyond standard continuity checks. DriveKNMS applies the following verification protocol to all NX boards prior to dispatch: (1) Visual inspection under magnification for solder joint integrity, capacitor condition, and connector pin alignment. (2) Powered bench test using a compatible NX drive frame to verify firmware boot sequence, parameter read/write function, and I/O channel response. (3) Fieldbus option boards are tested for protocol handshake and data exchange using a dedicated master simulator (PROFIBUS, CANopen, DeviceNet as applicable). (4) Boards with encoder or resolver interfaces are validated against a reference signal source to confirm input channel accuracy. (5) Final functional test under thermal soak conditions to identify latent component failures. Units that do not pass all stages are quarantined and not offered for sale. Test records are retained and available upon request for critical applications.

For sourcing inquiries, technical compatibility questions, or bulk spare parts requirements for the VACON NX series:

• Email: [email protected]
• WhatsApp: +86 18359293191
• Web: driveknms.com