Yaskawa Motoman XRC Modules: SRDA-SDB95A01A-E / SRDA-SDB71A01A-E / JANCD-XCP01C-1

Technical Dossier

Product Details And Specifications

Yaskawa Motoman XRC Series: Comprehensive Module Range and Technical Overview

The Yaskawa Motoman XRC is a robot controller platform deployed across heavy industrial sectors globally, including petrochemical plants, nuclear facility maintenance operations, automotive body welding lines, and steel mill material handling systems. Introduced in the late 1990s as the successor to the MRC controller, the XRC established Yaskawa's dominance in multi-axis industrial robot control by supporting up to 8 axes of coordinated motion and dual-arm (R1/R2) configurations. Its modular backplane architecture — built around a VME-derived internal bus — allowed system integrators to configure controllers for arc welding, spot welding, handling, painting, and sealing applications from a common hardware base. Installed base counts in the hundreds of thousands of units across North America, Europe, and Asia-Pacific make the XRC one of the most widely maintained legacy robot controllers in active industrial service today.

The Evolution of XRC Architecture

The XRC controller succeeded the MRC (1990s) and preceded the NX100 (introduced circa 2003–2004). Its internal architecture is based on a proprietary Yaskawa backplane with dedicated slots for the CPU board, servo amplifier interface boards (SRDA series), I/O boards (JANCD series), and communication adapters. The SRDA-SDB series boards serve as the primary servo driver interface, translating motion commands from the CPU into drive signals for the servo amplifiers. Early XRC units used the SRDA-SDB71A01A-E as the standard servo interface board for standard 6-axis configurations. As payload classes increased and multi-robot cell configurations became common, the SRDA-SDB95A01A-E was introduced to support expanded axis counts and higher-current servo loops.

The JANCD-XCP01C-1 is the primary CPU/control processing board for the XRC, responsible for trajectory calculation, teach pendant communication, I/O arbitration, and system diagnostics. Firmware is stored on onboard flash memory; board replacement requires firmware re-flashing and parameter restoration from backup. Compatibility between JANCD-XCP01C-1 revisions and SRDA-SDB board generations must be verified against the controller's software version (YAS-XRC-SV-xxx). The XRC platform reached end-of-production status, with Yaskawa officially transitioning customers to the NX100 and subsequently the DX100 and YRC1000 platforms. However, the XRC remains in active service at thousands of facilities where capital replacement is deferred, making lifecycle extension parts sourcing a critical operational requirement.

Motoman XRC Full Catalog & Functionalities (SKU List)

The following SKUs represent verified components within the Yaskawa Motoman XRC controller ecosystem, classified by functional category:

CPU & Control Processing Boards

JANCD-XCP01C-1: Main CPU board; trajectory control, I/O arbitration, pendant interface.
JANCD-XCP01B: Earlier CPU board revision; compatible with XRC software versions prior to SV1.xx.
JANCD-XIF01: Interface board; bridges CPU backplane to servo and I/O subsystems.

Servo Driver Interface Boards (SRDA Series)

SRDA-SDB95A01A-E: Servo interface board; supports expanded axis configurations and high-current servo loops.
SRDA-SDB71A01A-E: Standard servo interface board; 6-axis XRC configurations, MPL800 class robots.
SRDA-SDB01A: Base servo driver board; earlier XRC servo interface generation.
SRDA-COA30A: Servo amplifier control board; interfaces SRDA drive units to XRC backplane.
SRDA-EAXA01A: Servo amplifier axis board; per-axis servo drive control within SRDA drive units.

I/O Modules (JANCD Series)

JANCD-XIO01: General-purpose digital I/O board; 32 DI / 32 DO, XRC standard I/O expansion.
JANCD-XIO02: Extended I/O board; supports additional discrete I/O for complex cell configurations.
JANCD-XEW01: Arc welding interface board; weld controller signal integration for MIG/MAG processes.
JANCD-XSW01: Spot welding interface board; gun control and weld timer synchronization.
JANCD-XMS01: Motion synchronization board; coordinates R1/R2 dual-arm motion in coordinated mode.

Communication & Network Adapters

JANCD-XPN01: PROFIBUS-DP adapter board; fieldbus integration for Siemens PLC environments.
JANCD-XDN01: DeviceNet adapter board; Allen-Bradley PLC network integration.
JANCD-XCC01: CC-Link communication board; Mitsubishi network protocol support.

Power Supply Units

JZNC-XPU01: Primary power supply unit for XRC controller; 24VDC logic power distribution.
JZNC-XPU02: Auxiliary power supply; redundant power for extended I/O configurations.

Sourcing Hard-to-Find & Obsolete Motoman XRC Parts

The Yaskawa Motoman XRC platform is classified as end-of-life (EOL) by the OEM. New production of JANCD-XCP01C-1, SRDA-SDB95A01A-E, SRDA-SDB71A01A-E, and associated SRDA/JANCD series boards has ceased. Lead times through authorized Yaskawa service channels for remaining new-old-stock (NOS) units are unpredictable and frequently result in no-quote responses. DriveKNMS maintains a dedicated inventory of tested XRC platform components sourced through controlled decommissioning programs, authorized distributor liquidations, and direct factory surplus channels. Our XRC inventory covers CPU boards, servo interface boards, I/O modules, communication adapters, and power supply units. For facilities operating XRC controllers beyond OEM support windows, DriveKNMS provides: verified replacement boards with full traceability documentation; emergency same-day dispatch for critical production downtime situations; cross-reference support for identifying compatible substitute boards where direct replacements are unavailable; and long-term supply agreements for facilities with multiple XRC units requiring ongoing maintenance inventory.

Quality Control for the Motoman XRC Range

XRC platform boards present specific test challenges due to their proprietary backplane bus architecture and firmware dependency. DriveKNMS applies the following verification protocol to all XRC components prior to dispatch: Visual inspection for backplane connector pin damage, capacitor condition, and PCB trace integrity — common failure points on boards recovered from high-vibration environments. Functional power-on test using a dedicated XRC controller test bench, verifying board initialization, backplane communication handshake, and absence of fault codes. For SRDA-SDB series boards: servo loop continuity verification and axis enable signal testing across all supported axes. For JANCD-XCP01C-1 CPU boards: firmware version identification, memory integrity check, and pendant communication port verification. For I/O boards: channel-by-channel DI/DO functional test under simulated load conditions. All boards are dispatched with a test report and a 12-month warranty against functional failure under normal operating conditions.