1. General Description

2. Basic Information

• Model: JANCD-MM01C (often miswritten as MMOIC)

• Variants: MM01C-01, MM01C-02

• Mfg: Yaskawa Electric (Yasnac/Motoman)

• Type: Volatile DRAM expansion board (no battery)

• Part No: DF8100494

• Status: EOL / Discontinued

3. Technical Specifications

• Memory: DRAM (volatile; data lost on power-off)

• Bus: Proprietary parallel bus (plugs into CPU board)

• Power: 5 VDC (backplane supplied)

• Operating Temp: 0 °C to +40 °C

• Humidity: 5%–80% RH (non-condensing)

4. Key Functions

• Expands user memory for larger robot/CNC programs and multiple jobs

• Stores system parameters, I/O configs, motion/tool data, program buffers

• Works with CPU boards: JANCD-MCP01 / MCP02

5. Compatibility

• ✅ Motoman: XRC / MRC robot controllers

• ✅ Yasnac: LX-1 / MX-1 CNC systems

• ❌ Not compatible: DX/FS/YRC robots, MM20/MM21, non-Yaskawa systems

6. Installation & ESD Safety

• Power OFF before installation; no hot swap

• Use grounded ESD wristband (static-sensitive components)

• Align connector, insert firmly into CPU slot, secure screws

• Operate in clean, dry, vibration-free environment

7. Related Model Differences

• MM01C: LX-1/XRC, standard DRAM, user data area

• MMM01: XRC/MRC, basic DRAM

• MMM02: XRC/MRC, EPROM+RAM (firmware+user data)

• MMM04: XRC/MRC, high-capacity RAM for complex programs