1. General Description

2. Specifications

• Model: JANCD‑MM02‑44 (JANCD‑MM0244)

• Manufacturer: Yaskawa Electric

• Type: Non‑volatile memory expansion board (program/parameter storage)

• Storage Media: Combined EPROM and Flash memory, providing reliable power‑fail data retention

• Storage Capacity: Approximately twice the capacity of the standard MM02, supporting more complex user programs, additional axis parameters, expanded I/O settings, and extended system logs

• Core Functions: Stores system firmware, robot job programs, CNC machining programs, motion parameters, I/O address assignments, tool compensation data, system backups, and fault logs; enables direct system boot from the board, one‑click backup/restore, and offline program transfer between matching controllers

• Hardware Interface: Proprietary parallel bus edge connector, directly mating with the controller backplane slot for stable high‑speed communication

• Power Supply: Powered by 5 VDC from the controller backplane; no external power required, with low power consumption

• Operating Temperature: 0 °C to +55 °C, suitable for standard industrial cabinet environments

• Storage Temperature: −20 °C to +70 °C, ensuring no data loss during long‑term storage

• Humidity: 5% RH to 95% RH, non‑condensing, adaptable to humid industrial workshop conditions

• Mounting: Installed in a standard 3U slot inside the controller, secured by two screws for vibration resistance and easy access

• Physical Dimensions: Standard industrial control board size, compatible with Yaskawa MRC/XRC controller racks

• Weight: Approximately 0.4 kg, lightweight with no extra load on the controller

• Compatibility: Fully compatible with Yaskawa MRC series robot controllers, XRC series robot controllers, and early YASNAC i60/i70 series CNC systems; not compatible with DX series robots or newer CNC models

• Product Status: Discontinued by the original manufacturer; only used, refurbished, or stock spare parts available on the market

• Reliability: Equipped with anti‑static and surge protection circuits, supporting long‑term continuous operation in industrial environments with a high MTBF (mean time between failures)

3. Installation and Replacement

1. Power Off and Lockout: Shut down the controller and disconnect all AC and DC power sources to prevent electric shock or equipment damage.

2. Locate Slot: Identify an empty standard 3U slot in the controller rack.

3. Insert Board: Align the edge connector of JANCD‑MM02‑44 with the slot, then insert firmly until the connector is fully seated.

4. Secure Board: Fasten the board with two mounting screws to prevent loosening from vibration.

5. Power On and Recognition: Restore power to the controller; the system will automatically detect and recognize the memory board.

6. Load Data: After recognition, load the system software or restore a backup via the controller’s menu interface.

4. Backup and Restore Procedures

• Backup: Use the teach pendant (for robots) or CNC operation menu to save all system and user data, including programs, parameters, and logs, to JANCD‑MM02‑44.

• Restore: Boot the controller directly from the memory board or select the “Restore from Memory Board” option in the menu to recover data.

• Best Practice: Maintain redundant backups—one on JANCD‑MM02‑44 and one on an external USB storage device—to prevent data loss.

5. Safety and Handling Precautions

• ESD Protection Mandatory: Always wear a grounded anti‑static wrist strap when handling the board to avoid static damage to electronic components.

• No Hot Plugging: Never insert or remove the board while the controller is powered on; this may damage the board or controller.

• Environmental Protection: Avoid exposure to static electricity, moisture, dust, and physical impact; store in a dry, clean environment when not in use.

• No Modification: Do not open, modify, or repair the board by unauthorized personnel; any tampering will void the warranty.

• Ventilation Maintenance: Keep the controller’s ventilation area unobstructed; clean dust annually to ensure heat dissipation and prevent overheating.

6. Compatibility Statement

7. Difference from Standard MM02

• JANCD‑MM02: Standard capacity, basic read/write speed, designed for small‑to‑medium user programs and standard parameter sets.

• JANCD‑MM02‑44: High‑capacity version, supporting larger and more complex programs, expanded parameter storage, and longer‑term data logging; pin‑compatible and directly interchangeable with the standard MM02 for easy upgrade or replacement.