Digital CNC Circuit Board Fancu I/O Module A20B-2002-0521 Input Output Board
A20B-2002-0521 Genuine New FANUC I/O Module
Original FANUC Digital Input/Output Board | CNC Control Expansion
Part Number: A20B-2002-0521
Description:
- 48/32 OPERATOR PANEL I/O PCB W/O MPG INTERFACE
- Product Series: A20B-2002
- Availability: Call for availability
- Repair: Not offering at this time
The FANUC A20B-2002-0521 board is a 48/32 Operator Panel I/O PCB without a MPG Interface. As part of the A20B-2002 series of PCB I/O units, the FANUC A20B-2002-0521 board is fitted for 0i, 15i, 16i, 18i, 20i, and 21i operator panel systems. This FANUC A20B-2002-0521 I/O board does not have a manual pulse generator, which would specifically associate it with certain machinery that is numerically controlled. For any additional information regarding the FANUC A20B20020521 board, call our free tech support at 615-471-9450. View the details on this listing for repair, core credit exchange, or purchasing options. In addition to the FANUC A20B-2002-0521 I/O board, TIE also offers other I/O Units, PCB Boards, and other FANUC parts in our online store.
FANUC A20B-2002 Series I/O Board Comparison
| Model | I/O Type | Input Points | Output Points | Voltage | Interface | Typical Application |
|---|---|---|---|---|---|---|
| A20B-2002-0521 | Digital I/O | 32 In | 32 Out | 24V DC | FANUC CNC Bus | General CNC machine I/O expansion |
| A20B-2002-0420 | Digital Input | 64 In | 0 | 24V DC | FANUC CNC Bus | Signal collection only |
| A20B-2002-0530 | Digital I/O | 48 In | 16 Out | 24V DC | FANUC CNC Bus | Mixed I/O control |
| A20B-2002-0300 | Digital Output | 0 | 64 Out | 24V DC | FANUC CNC Bus | Actuator & relay control |
| A20B-2002-0170 | Relay Output | 0 | 32 Relay | 250VAC / 30VDC | FANUC CNC Bus | High-power output control |
Selection Guide
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A20B-2002-0521 → Best balanced I/O solution (input + output)
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0420 → For sensor signal acquisition only
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0300 → For solenoid valves, relays, and actuators
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0170 → For high-load output devices
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0530 → More inputs, fewer outputs for mixed systems
Key Features
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Genuine FANUC main CPU board
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High-speed data processing and control
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Stable performance in continuous operation
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Designed for precision CNC system management
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Compact, durable, and heat-resistant design
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Fully compatible with FANUC control systems
Applications
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FANUC CNC machine control systems
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Milling, turning, and grinding centers
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Industrial automation and robotics systems
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OEM and retrofit FANUC control units
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