CNC Series: 16i‑B, 18i‑B, 21i‑B (i‑B series)

Installation: Secondary slot on the riser board of the main CPU PCB (A20B‑8100 series)

Protocol: PROFIBUS‑DP (Master Mode)

Role: PROFIBUS‑DP master (controls slaves on the network)

Transmission Rate: Up to 12 Mbps (standard PROFIBUS‑DP)

Connector: Standard DB9 PROFIBUS port

Power: Supplied via CNC backplane

Operating Temperature: 0 °C to +55 °C

Humidity: 5%–95% RH (non‑condensing)

PROFIBUS‑DP Master Communication: Connects CNC to PROFIBUS‑DP slave devices (PLCs, I/O modules, drives)

Data Exchange: High‑speed cyclic I/O data exchange between CNC and factory floor devices

Network Integration: Links FANUC 16i/18i/21i‑B systems to Siemens/third‑party PROFIBUS networks

System Expansion: Enables multi‑axis, multi‑spindle control via PROFIBUS‑DP

ESD Protection: Use anti‑static wrist strap

Power Off: Disconnect CNC power before insertion/removal

Slot: Insert into dedicated secondary slot on the CPU riser

Cabling: Use shielded PROFIBUS cable; follow standard wiring (DB9 pins 3, 5, 7)

No Communication: Check seating, cable, termination, and baud rate

Slave Dropouts: Verify network topology, grounding, and cable integrity

Configuration Error: Confirm CNC software supports PROFIBUS‑DP master

A20B-8100-0430: PROFIBUS‑DP master board (this part)

A20B-8100-0420: Earlier PROFIBUS‑DP slave variant