1. General Information

• Part Number: JANCD-SP21

• Manufacturer: Yaskawa Electric Corporation / Motoman Robotics

• Product Type: CRT/MDI Operator Panel Control Board

• Function:

  • MDI keyboard scanning and control

  • Monochrome CRT video drive and display

  • Ethernet 10/100 + RS-232 communication

  • Front-panel I/O and LED status indication

• Applicable Systems:

  • Motoman ERC Robot Controller (late-model revisions)

  • YASNAC LX3 / MX3 CNC System (with MDT-948B-3 monochrome CRT)

• Status: Discontinued (original production ended; only used/refurbished units available)

• Series Position: Final upgraded version of JANCD-SP20B / SP20C

2. Specifications

Electrical

• Power Supply: 24 V DC (backplane bus)

• Current Consumption: Max 2 A

• Communication Interfaces:

  • Ethernet: 10/100 Mbps (RJ45)

  • RS-232: Serial port (DB9)

• Keypad Interface: 20-pin flat cable to JANCD-SP19

• Video Output: Monochrome CRT (MDT-948B-3 compatible)

Environmental

• Operating Temperature: 0 °C to +55 °C

• Storage Temperature: −20 °C to +60 °C

• Humidity: ≤95% RH (non-condensing)

• Altitude: Up to 1,000 m

Physical

• Dimensions: Standard Yaskawa backplane card size

• Weight: Approx. 0.4 kg

• Mounting: Dedicated slot in ERC/LX3/MX3 backplane

3. Main Functions

1. Keyboard Scanning & Encoding

   • Reads key matrix from SP19 membrane keypad

   • Debounce, anti-ghosting, key code encoding

   • Faster scan rate vs SP20C

2. CRT Display Control

   • Drives MDT-948B-3 monochrome CRT

   • Text, parameter, and system status display

   • Enhanced video driver for stable sync

3. Dual-Port Communication

   • Ethernet: Network connection, diagnostics, data upload/download

   • RS-232: Serial communication with peripherals (printers, terminals)

4. Front-Panel I/O & LEDs

   • Mode switches, operator controls

   • Status/error/mode LEDs (more indicators than SP20C)

5. System Data Bridge

   • High-speed data exchange between HMI and main CPU