Yaskawa JANCD-B Baseboard / Processor Module
May 29, 2026

Yaskawa JANCD-B Baseboard / Processor Module

JANCD-B is a baseboard/processor module for Yaskawa Motoman XRC robot controllers and YASNAC CNC systems. It serves as a system backplane & central control interface, providing physical interconnection, power distribution, and signal routing between the main CPU, I/O boards, and servo units. Often referred to as a backplane board or base control module, it is a legacy part (discontinued) but still widely used for maintenance and replacement in older automation lines. Official Yaskawa internal designation: DFB20257 (Rev. A01 / B02).

Description

Model Definition

  • JANCD: Standard prefix for Yaskawa CNC/robot control PCBs

  • B: Baseboard / Backplane unit (core system interconnect)

  • Alias: JANCDB (hyphen omitted), JANCD-B02 Rev.A01

Technical Specifications

Electrical

  • Power Supply: 24 V DC ±10% (system bus power)

  • Bus Interface: XRC backplane bus, multi‑slot interconnect

  • Signal Routing: CPU, servo, I/O, and communication signal lines

  • Fusing: Integrated onboard fuses for overcurrent protection

Mechanical & Environmental

  • Dimensions (W×H×D): 250 mm × 150 mm × 35 mm

  • Weight: Approx. 0.4–1.0 kg

  • Mounting: Standard slot installation in XRC controller cabinet

  • Operating Temp: 0 °C to +40 °C

  • Operating Humidity: 10%–80% RH, non‑condensing

  • Protection Class: IP20

Core Functions

  • Acts as the main system backplane, mechanically and electrically connecting all controller boards (CPU, I/O, servo, communication).

  • Distributes 24 V DC power to all plug‑in modules and conditions system voltage.

  • Routes high‑speed control signals between the main CPU and peripheral units (servo drives, I/O boards, teach pendant).

  • Provides slot expansion for additional I/O or communication modules.

  • Ensures system‑wide signal integrity and noise isolation for stable operation.

Applications

  • Motoman XRC Robot Controllers: Welding, material handling, assembly, spraying robots.

  • Yaskawa YASNAC i80/i90 CNC Systems: Machine tool control and automation.

  • Legacy Automation Lines: Replacement of faulty backplane boards in aging production equipment.

Compatibility & Notes

  • Dedicated for XRC series controllers and YASNAC i80/i90 CNC systems; not interchangeable with other JANCD series I/O or CPU boards.

  • Drop‑in replacement for JANCD‑B (Rev. A01/B02) with no wiring changes required.

  • Keep cabinet ventilation adequate and ambient temperature within 0–40 °C to prevent overheating and ensure long‑term reliability.


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