Compatibility

• CNC Series: 16i‑B, 18i‑B, 21i‑B

• Mount Location: Main slot inside the CNC control unit

• Replacement: Compatible with other 8200 series revision boards

Key Specifications

• Processor: High‑speed 32‑bit CNC CPU

• Memory: Onboard SRAM (1–2 MB) for parameters, programs, and tool offsets

• Backup Battery: 3.6 V lithium battery required (for SRAM data retention)

• Interfaces:

  • FSSB: Fiber optic servo bus port

  • I/O Link: High‑speed serial I/O port

  • RS‑232C: Serial communication port

  • Memory Card: Slot for program backup/restore

• Power Supply: 24 V DC ±10%

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

Main Functions

• NC Program Execution: Interpolation calculation and motion control

• PMC Logic: Built‑in PLC for machine I/O and sequence control

• Servo Control: Axis command generation via FSSB fiber bus

• Data Storage: Parameters, programs, and compensation data in SRAM

• Network Communication: Connection to I/O modules and external devices

Installation & Maintenance

• Power Off: Disconnect power before installation/removal

• ESD Protection: Use anti‑static wrist strap

• Battery Care: Replace 3.6 V battery annually to prevent data loss

• Backup: Save all parameters and programs before board replacement

Common Troubleshooting

• No Boot / Black Screen: Check battery voltage and SRAM data integrity

• FSSB Communication Error: Verify fiber cable connection and axis configuration

• I/O Link Failure: Inspect I/O Link wiring and node addresses

• Data Loss: Restore from backup after battery replacement

Related Models

• A20B-8200-0927: 16i/18i/21i‑B main board

• A20B-8200-0385: 0i‑C series main board

• A20B-8101-0100: PROFIBUS DP slave board