Key Identifiers

• Part Number: DF8203751‑A0 (Rev. A0)

• Manufacturer: Yaskawa Electric (Japan)

• Type: Auxiliary I/O / Control PCB

• Status: Obsolete (available as new surplus, refurbished, or used)

Specifications

Electrical

• Power Input: 5 V DC, ±12 V DC, 24 V DC (via system backplane)

• Signal Interface: Digital I/O, analog signals, and system bus communication

• Power Consumption: ~8–10 W

Mechanical & Environmental

• Mounting: Slot‑mounted in controller cabinet

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

• Cooling: Natural convection

• Dimensions (W×H×D): ~250 mm × 140 mm × 25 mm

• Weight: ~0.4–0.5 kg

Core Functions

• I/O Expansion: Provides additional digital input/output channels for machine peripherals (limit switches, sensors, relays).

• Signal Conditioning: Processes analog and discrete signals for CNC/robot logic.

• System Interfacing: Communicates with the main CPU board via the backplane bus.

• Auxiliary Control: Manages auxiliary functions such as spindle control or coolant logic.

Compatibility (J300/J500 / XRC Series)

• CPU Board: JANCD‑CP11 (DF8203078‑B0 / DF8203078‑D0)

• Memory Board: JANCD‑MM20 (DF8203490‑A0)

• I/O Backplane: JANCD‑1003E (DF8203498‑C0)

• Servo Control Board: JANCD‑CG31‑1 (DF8203626‑C0)

• Servo Amplifier: JANCD‑SV03B (DF8203661‑B0)

Applications

• Yasnac J300/J500 CNC machine tools

• Motoman XRC robots (UP6, HP20, etc.)

• Legacy automated production lines (spare part replacement)

Maintenance & Replacement

• Handle with ESD protection to avoid static damage.

• Inspect connectors and pins every 6 months for wear or oxidation.

• Common issues: I/O port failure, signal noise, or communication errors.

• Replace only with the exact part number DF8203751‑A0 to ensure compatibility.

• Back up system parameters before replacement to prevent data loss.