YASKAWA JANCD-YBK01-1E SLC440COM-ER-0650-14 SGDR-SDA950A01B-EY26: Servo Control Modules, Specs & Availability

Technical Dossier

Product Details And Specifications

YASKAWA JANCD-YBK01 Series: Comprehensive Module Range and Technical Overview

The YASKAWA JANCD-YBK01 series represents a core control board family within the YASKAWA Sigma and CACR-series AC servo drive platforms. These modules are deployed extensively across global heavy industry sectors including petrochemical refineries, nuclear power auxiliary systems, steel rolling mills, and automated assembly lines. The JANCD-YBK01-1E specifically functions as a servo control interface board, coordinating encoder feedback, axis command processing, and drive-to-controller communication within multi-axis servo systems. Its installed base spans OEM machine builders in Japan, Germany, South Korea, and China, making it one of the most referenced legacy servo control boards in the industrial MRO (Maintenance, Repair, and Overhaul) market.

The complete assembly referenced on this page — JANCD-YBK01-1E / SLC440COM-ER-0650-14 / SGDR-SDA950A01B-EY26 — represents a matched servo drive and control board set, where the SGDR-SDA950A01B-EY26 is the servo amplifier unit and the JANCD-YBK01-1E is its dedicated control card. The SLC440COM-ER-0650-14 designates the communication and encoder interface specification variant.

The Evolution of JANCD-YBK01 Architecture

The JANCD board family originated within YASKAWA's CACR-series servo amplifier platform in the early 1990s, serving as the primary digital control interface between the motion controller and the power stage. Early variants such as the JANCD-YBK01 (base revision) used parallel encoder interfaces and analog command inputs, compatible with YASKAWA's MP900 and MP2000 machine controllers.

As YASKAWA transitioned to the Sigma-II and Sigma-III servo families in the late 1990s and early 2000s, the JANCD board architecture was updated to support serial encoder (17-bit and 20-bit absolute) communication, replacing the earlier incremental encoder wiring schemes. The JANCD-YBK01-1E suffix denotes an enhanced revision with improved EMC filtering and support for higher-resolution encoder feedback loops.

By the mid-2010s, YASKAWA's Sigma-7 (SGDV/SGDH) platform superseded the SGDR-series amplifiers, rendering the JANCD-YBK01-1E and its associated SGDR-SDA950A01B-EY26 amplifier technically obsolete. However, due to the long operational lifecycle of heavy industrial machinery (15–25 years), demand for these components in the MRO channel remains active. No direct plug-and-play replacement exists; system upgrades require full servo amplifier and motor replacement, making original spare parts the preferred solution for production continuity.

JANCD-YBK01 Full Catalog & Functionalities (SKU List)

The following SKUs represent verified components within the YASKAWA JANCD-YBK01 control board family and associated SGDR-series servo amplifier ecosystem. Each entry is classified by functional role.

Control & Interface Boards

• JANCD-YBK01: Base revision servo control board for CACR/SGDR series amplifiers
• JANCD-YBK01-1E: Enhanced EMC revision; serial encoder interface; primary SKU on this listing
• JANCD-YBK01-2: Dual-axis control variant for compact multi-axis configurations
• JANCD-YBK02: Successor control board with expanded I/O capacity and fieldbus readiness
• JANCD-YBK02-1E: Enhanced revision of YBK02 with improved noise immunity
• JANCD-YCP01: CPU board for MP900-series controller integration with JANCD backplane
• JANCD-YCP02: Updated CPU board supporting Ethernet-based motion network

Servo Amplifier Units (SGDR-Series)

• SGDR-SDA950A01B-EY26: 950W AC servo amplifier; matched unit for JANCD-YBK01-1E; primary SKU on this listing
• SGDR-SDA2A0A01B: 2.0kW SGDR-series amplifier for medium-load axis applications
• SGDR-SDA5A0A01B: 5.0kW SGDR-series amplifier for heavy-duty servo axes
• SGDR-AXA950A01B: Alternate 950W variant with different encoder connector pinout
• SGDR-AXA2A0A01B: 2.0kW alternate variant; common in Japanese OEM machine tools

Communication & Encoder Interface Modules

• SLC440COM-ER-0650-14: Encoder/communication interface cable assembly; 650mm; 14-pin; matched to JANCD-YBK01-1E
• JANCD-YIF01: MECHATROLINK-II fieldbus interface card for JANCD backplane systems
• JANCD-YIF02: MECHATROLINK-III interface card; forward-compatible upgrade path
• JANCD-YSF01: Safety function board; STO (Safe Torque Off) implementation for JANCD-series

Power Supply & Regeneration Modules

• SGDR-COA900A: Regenerative resistor unit for SGDR 950W–2.0kW amplifier range
• SGDR-COA2A0A: Regenerative unit for 2.0kW–5.0kW SGDR amplifiers

Sourcing Hard-to-Find & Obsolete JANCD-YBK01 Parts

The JANCD-YBK01-1E and its associated SGDR-SDA950A01B-EY26 amplifier were officially discontinued by YASKAWA as the Sigma-7 platform became the production standard. YASKAWA's standard end-of-life policy provides a limited post-discontinuation spare parts window, after which OEM supply channels are closed.

DriveKNMS maintains a dedicated inventory of legacy YASKAWA servo components sourced through certified industrial surplus channels, decommissioned equipment recovery, and long-term MRO partnerships. For the JANCD-YBK01 family specifically, DriveKNMS provides: verified original boards with full traceability documentation, functional testing against YASKAWA servo amplifier test rigs, cross-reference matching for SLC-series cable assemblies, and lifecycle extension advisory for facilities operating SGDR-series drives beyond OEM support windows.

Quality Control for the JANCD-YBK01 Range

The JANCD-YBK01-1E presents specific quality verification challenges due to its role as a high-frequency signal processing board interfacing directly with the servo amplifier's encoder feedback and PWM command bus. DriveKNMS applies the following test protocol to all JANCD-YBK01 series boards prior to shipment:

• Visual Inspection: Full PCB inspection under 10x magnification for cold solder joints, capacitor bulge, trace corrosion, and connector pin deformation on the 14-pin SLC interface header.
• Power-On Functional Test: Board is installed into a matched SGDR-series amplifier test rig and powered through a controlled 3-phase input. Encoder feedback loop integrity is verified at 17-bit resolution.
• Communication Bus Verification: MECHATROLINK or serial encoder communication is exercised through a motion controller emulator to confirm command/response latency within YASKAWA specification.
• Thermal Cycling: Boards are subjected to a 0°C to 55°C thermal cycle to identify latent solder joint failures common in aged PCBs.
• Final Parametric Check: Output signal levels, encoder supply voltage (5V ±5%), and differential signal integrity are measured and logged against YASKAWA factory test specifications.

Each board ships with a DriveKNMS test report documenting all pass/fail criteria and the serial number of the test amplifier used.