I. Basic Information

Material Number: DF8203860-D0

Compatible System: YASNAC I80 / I80M Full Series CNC (Requires FC230B for use)

Assembly Backplate: JANCD-FC001 (Standard Backplate for I80)

Board Card Size: 267 × 152 mm (General Size for I80)

Weight: Approximately 0.29 kg

Power Supply: DC 5V ±5%, approximately 1.2 A (Backplate Power Supply, Power Consumption ≈ 6W)

Operating Temperature: 0°C ~ +55°C

Version: No derivative version, FC240 is the only model

II. Core Functions

Multi-axis Data Distribution (Core)

As an extension of FC230B (Motion Management Board), it shares high-speed data traffic

Manage 8-axis servo + 2-axis spindle command / feedback data routing

Reduce the load of FC230B and improve the overall system response speed

High-speed Bus Expansion

Provide an additional 2 channels of high-speed servo bus interfaces (CN28/CN29)

Support expansion of I80 system axis count to 16 axes (Requires multiple FC240s cascaded)

Bus Rate: 100 Mbps, Strong Anti-interference Capability

Signal Conversion and Isolation

Servo / Spindle Signal Photoelectric Isolation, Protecting Core Board Card

Differential Signal to Single-ended Signal, Adapted to Different Drive Interfaces

Filter Circuit Design, Reducing EMI/RFI Interference

System Monitoring and Alarm

On-board 4-channel LED Status Lights, Real-time Display: Power, Bus, Data, Fault

Monitor Data Transmission Errors, Bus Timeout, Signal Abnormalities

Fault Code Upload to CPU Board (FC200), Facilitating Diagnosis

Expansion Interface Support

CN28: Servo Expansion Interface (4 Axes)

CN29: Spindle Expansion Interface (2 Axes)

CN30: High-speed Data Interface with FC230B

III. Compatibility and Pairing

✅ Required Board Cards (I80 Expansion Configuration)

CPU Board: JANCD-FC200 (SMON Main Control Board)

Motion Management Board: JANCD-FC230B (MMON, Core)

Data Distribution Board: JANCD-FC240 (DDB, Extension)

Servo Interface Board: JANCD-FC226 (Signal Conversion)

PLC Board: JANCD-FC210 / FC211

✅ Replacement and Expansion Rules

Cannot be used alone: Must be paired with FC230B, without FC230B, FC240 cannot work

Cascading Expansion: The I80 system can support up to 2 FC240s, expanding to 16 axes

Incompatible with Old Systems: Only for I80/I80M, does not support I60/C70

No Alternative Models: FC240 is the exclusive expansion board for I80, no compatible alternative models

IV. Common Fault Phenomena

System Reports "Servo Bus Error" → FC240 Bus Interface Damaged or Data Link Fault

Some Servo Axes Disappear / Intermittent → Poor Contact of Expansion Interfaces (CN28/CN29) or Damaged Isolation Circuit

Contour Jitter During Machining (Expansion Axes) → FC240 Data Distribution Delay or Filter Circuit Failure

System Startup Reports "DDB Board Not Recognized" → Communication Fault between FC240 and FC230B or Board Card Damage