NIKKI NCR-DABOA2D Series Servo Motor Controllers

Technical Dossier

Product Details And Specifications

NIKKI DENSO NCR-DABOA2D Series: Comprehensive Module Range and Technical Overview

The NIKKI DENSO NCR-DABOA2D series represents a class of servo motor controllers engineered for precision motion control in heavy industrial environments. These units are deployed across chemical processing plants, petroleum refining facilities, nuclear power auxiliary systems, and large-scale manufacturing lines where axis positioning accuracy and drive reliability are non-negotiable operational requirements. The NCR-DABOA2D platform is characterized by its analog command interface, DC bus architecture, and compatibility with NIKKI DENSO's broader servo amplifier ecosystem. Installed base across Asia-Pacific and Middle Eastern industrial facilities remains substantial, making long-term spare parts availability a critical procurement concern for maintenance engineers and plant reliability teams.

The Evolution of NCR-DABOA2D Architecture

The NCR-DABOA2D series was developed by NIKKI DENSO CO., LTD. (Japan) as part of their industrial servo drive product line targeting multi-axis CNC and process control applications. Early variants in the NCR-D series used analog ±10V command signals with resolver-based feedback, a design philosophy that prioritized robustness over digital bus flexibility. As industrial automation migrated toward fieldbus protocols (PROFIBUS, DeviceNet, EtherCAT), NIKKI DENSO introduced hybrid variants capable of accepting both analog and pulse-train commands, extending the platform's compatibility window.

The DABOA2D sub-designation indicates a dual-axis output board configuration with integrated regenerative braking circuitry. This architecture was specifically designed for coordinated two-axis motion in gantry systems and cross-slide mechanisms. Compatibility with legacy NIKKI DENSO servo motors (NM series, NS series) is maintained across the NCR-DABOA2D range, though motor encoder interface cards may require substitution when pairing with third-party servo motors. The series entered its mature/end-of-production phase, and NIKKI DENSO no longer manufactures new units under this designation. Replacement and lifecycle extension are now the primary procurement drivers for this platform.

NCR-DABOA2D Full Catalog & Functionalities (SKU List)

The following SKUs represent verified models within the NIKKI DENSO NCR-DABOA2D and closely related NCR-D servo controller series. Each unit is classified by functional role within a servo drive system:

Servo Controller / Drive Boards:

• NCR-DABOA2D-401B: Dual-axis servo output board, 400W class, analog command input, resolver feedback interface
• NCR-DABOA2D-201B: Dual-axis servo output board, 200W class, ±10V analog command, DC bus regenerative type
• NCR-DABOA2D-751B: Dual-axis servo output board, 750W class, enhanced current loop bandwidth, for high-inertia loads
• NCR-DABOA2D-102B: Dual-axis servo output board, 1kW class, extended thermal rating for continuous duty cycles
• NCR-DABOA2D-152B: Dual-axis servo output board, 1.5kW class, reinforced IGBT output stage

Single-Axis Servo Controller Variants (NCR-SBOA / NCR-ABOA Series):

• NCR-SBOA2D-401B: Single-axis servo output board, 400W, analog command, resolver feedback
• NCR-SBOA2D-201B: Single-axis servo output board, 200W, pulse-train command compatible
• NCR-ABOA2D-401B: Single-axis analog servo board, 400W, direct motor current control mode
• NCR-ABOA2D-751B: Single-axis analog servo board, 750W, high-speed current response variant

Command / CPU Interface Boards:

• NCR-CPU01: Main CPU board for NCR series servo systems, position loop processing, RS-232C interface
• NCR-CPU02: Enhanced CPU board, multi-axis position interpolation, expanded parameter memory
• NCR-CBOA01: Command interface board, analog ±10V input conditioning, axis enable logic
• NCR-CBOA02: Command interface board with pulse-train input (CW/CCW or A/B phase)

Power Supply / Regenerative Units:

• NCR-PSBOA01: DC bus power supply board, 24VDC logic rail, servo enable relay output
• NCR-RGBOA01: Regenerative discharge resistor board, for high-cycle deceleration applications
• NCR-PSBOA02: Dual-rail power supply board, +15V/−15V analog supply for command circuitry

Feedback / Encoder Interface Boards:

• NCR-RBOA01: Resolver-to-digital converter board, 12-bit resolution, compatible with NIKKI DENSO NM-series motors
• NCR-ENCBOA01: Incremental encoder interface board, A/B/Z phase input, 5V differential line driver

Sourcing Hard-to-Find & Obsolete NCR-DABOA2D Parts

The NCR-DABOA2D series is no longer in active production. NIKKI DENSO's official support channels do not supply new units or factory-refurbished boards for this designation. For plant operators running equipment built around this platform, the procurement options are: new-old-stock (NOS) units sourced from authorized industrial surplus channels, professionally tested used boards from decommissioned machinery, and functional equivalents where cross-compatibility has been verified.

DriveKNMS maintains a dedicated inventory of NCR-DABOA2D series boards sourced from controlled industrial surplus. Each unit undergoes incoming inspection before listing. For obsolete or low-availability models, DriveKNMS operates a global sourcing network to locate specific board revisions and firmware versions required for drop-in replacement without system reconfiguration. Customers are advised to provide the full board part number including revision suffix (e.g., -401B, -201B) and any visible date codes when submitting inquiries, as board revisions may affect pin-compatibility with existing backplane connectors.

Quality Control for the NCR-DABOA2D Range

Servo output boards in the NCR-DABOA2D series present specific test challenges due to their dual-axis IGBT output stages, analog command conditioning circuits, and resolver interface sections. DriveKNMS applies the following test protocol to all NCR-DABOA2D units prior to dispatch:

• Visual inspection: PCB trace integrity, capacitor condition (ESR measurement on electrolytic capacitors), IGBT gate driver IC identification and continuity check
• Power-on test: DC bus energization under controlled current-limited conditions, logic rail voltage verification (+5V, ±15V, +24V)
• Analog command response test: ±10V command signal injection, current loop response measurement, zero-speed offset calibration verification
• Resolver interface test: Excitation signal output verification (typically 7–10kHz sine wave), R1/R2/S1/S2/S3/S4 signal continuity and impedance check
• Thermal cycling: Board operated at rated load for minimum 30 minutes, thermal imaging used to identify abnormal hotspots on IGBT modules and gate resistors
• Output stage verification: Motor phase output voltage symmetry check under no-load and resistive load conditions

All units are shipped with a test report. Boards that fail any stage of the above protocol are quarantined and not listed for sale.