PC-20
June 02, 2026

PC-20

JANCD-PC20 is the main CPU control board exclusively for Motoman XRC series robot controller. It works cooperatively with MYCENTER-0, N2-3, MRY01B-1/MRY01B-2 and MEW02-2 inside the same control cabinet backplane. Original production has been discontinued; only pre-tested used and refurbished spare boards are available for maintenance. It fits XRC-SK, UP, EA and other common Motoman six-axis robot models for welding, handling and spot welding applications.

Description

1. Product Overview

JANCD-PC20 serves as the core main CPU board for Motoman XRC robot controller. It is installed on the cabinet backplane and matches MYCENTER-0, N2-3, MRY01B-1/MRY01B-2 and MEW02-2 modules. Original production is discontinued; only tested second-hand or refurbished boards are supplied for maintenance. Compatible with XRC-SK, UP and EA series six-axis robots for welding, handling and spot welding jobs.

2. Main Functions

  1. Runs INFORM III robot programs, handles trajectory interpolation, coordinate conversion and logic operation, and stores robot mechanical parameters, origin position data and user programs.

  2. Sends control signals via backplane bus to all auxiliary boards: I/O commands to MYCENTER-0, servo instructions to N2-3, and analog control signals to MEW02-2.

  3. Communicates with teach pendant through serial interface for program upload/download and fault information display. An onboard backup lithium battery keeps parameter data intact after power failure.

  4. Monitors safety circuits such as emergency stop and safety door signals and triggers shutdown and alarm upon abnormal conditions.

3. Electrical and Environmental Specifications

  • Input Power: +5VDC from cabinet backplane

  • Working Temperature: 0℃~+40℃; Storage Temperature: -20℃~+50℃

  • Humidity: 10%~80% RH, non-condensing; Max working altitude ≤1000m

  • Onboard parts: backup lithium battery holder, serial port, ROM and RAM chips

4. Common Failures

  1. Teach pendant no display or communication loss, usually caused by damaged power IC or PCB corrosion from battery leakage.

  2. Startup error alarms and failed origin calibration due to damaged memory and lost parameters.

  3. Intermittent servo shutdown and random servo alarms caused by unstable bus connection with N2-3.

  4. Total peripheral I/O malfunction from broken communication between PC20 and MYCENTER-0.

5. Replacement & Safety Rules

  1. Cut off the robot’s main AC power and wait over 15 minutes to release residual voltage; hot plugging is forbidden.

  2. Label all connecting cables before dismounting the faulty board and fit the replacement into the original slot.

  3. Reconnect wires as marked, replace backup battery when necessary, then test startup, single-axis jogging and peripheral I/O after power-on.

6. Compatibility

This CPU board is exclusively designed for XRC robot systems and cannot be used on YASNAC MX-series CNC machine tools.


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