Compatibility

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

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

• Protocol: DeviceNet (Master Mode) – compatible with Allen‑Bradley RIO networks

Key Specifications

• Role: DeviceNet master (controls up to 63 slaves)

• Transmission Rate: 125 kbps / 250 kbps / 500 kbps (selectable)

• Connector: DB9 DeviceNet port

• Power: 3.3V DC via CNC backplane

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

• Humidity: 5%–95% RH (non‑condensing)

• Isolation: Galvanic isolation between CNC and network

Main Functions

• DeviceNet Master Communication: Connects CNC to DeviceNet slaves (PLCs, I/O blocks, drives, robots)

• High‑Speed I/O Exchange: Cyclic data exchange (digital/analog I/O) between CNC and factory devices

• Network Management: Addressing, baud rate setup, slave diagnostics

• System Integration: Links FANUC i‑B CNC to AB PLC systems (common in automotive lines)

Installation & Handling

• ESD Protection: Anti‑static wrist strap required

• Power Off: Disconnect CNC power before insertion/removal

• Orientation: Align notch with slot key; do not force

• Cabling: Use shielded DeviceNet cable; terminate both ends (120 Ω)

Troubleshooting

• No Link: Check seating, DB9 cable, termination, baud rate match

• Slave Errors: Verify node addresses, power, and wiring

• Communication Drops: Check grounding, cable integrity, noise

Related Models

• A20B-8100-0491: DeviceNet Master PCB A (this part)

• A20B-8100-0430: PROFIBUS‑DP Master (different protocol)

• A20B-8001-0700: DeviceNet RIO card (for robot controllers)