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Match the complete marking
Include A20B-3300-0281/04B and any revision or assembly number visible on the item. Keep the exact reference on your enquiry and quotation.
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Request available label and connector photos. Have your maintenance team compare the offered A20B-3300-0281/04B with the installed equipment and applicable FANUC documentation.
Technical specifications for A20B-3300-0281/04B
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Manufacturer:Fanuc
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Product Category:General Automation
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Spare Part Number:A20B-3300-0281/04B
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Weight:0.54 kg
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Tariff Code:8537101190
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Base drawing number:A20B-3300-0281
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Base-design function:Display control card
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Base-design display:8.4-inch color LCD
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Hardware context:Applicable Series 0i-C / 0i Mate-C basic-unit arrangement
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Display-control elements:Display CPU, control circuit and display memory
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CNC CPU relationship:Separate CPU card in the applicable arrangement
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Axis-control relationship:Separate axis-control card in the applicable arrangement
Information
Overview
Downloads
Applications / Compatibility
Product Precautions
- FANUC A20B-3300-0281/04B supports display-control maintenance where the CNC basic unit, display hardware and complete board marking must be matched together.
Offered identity: A20B-3300-0281/04B
Base-design function: Display control for an 8.4-inch color LCD
Hardware relationship: Separate display-control, CNC CPU and axis-control cards
Selection boundary: Match the complete suffix and CNC basic-unit configuration
Base-design function: Display control for an 8.4-inch color LCD
Hardware relationship: Separate display-control, CNC CPU and axis-control cards
Selection boundary: Match the complete suffix and CNC basic-unit configuration
The A20B-3300-0281 base design is a display-control card for an 8.4-inch color LCD in the applicable FANUC Series 0i-C and 0i Mate-C hardware arrangement. The offered A20B-3300-0281/04B retains its complete suffix as a separate identity requirement. The 10.4-inch and 7.2-inch display arrangements use different card references, so LCD size and board identity must be considered together.
In this hardware arrangement, the display-control card contains a display-control CPU, display-control circuit and display-control memory. The CNC CPU card and axis-control card occupy separate functional positions, while the FROM/SRAM module provides control-software storage and battery-backed SRAM. CNC CPU DRAM sizes and axis counts therefore describe other components and must not be assigned as specifications of the offered display card.
The applicable basic-unit drawing families are A02B-0309-B50n, A02B-0311-B50n and A02B-0311-B51n, with n from 0 to 9. Other basic-unit arrangements use different hardware. Preserve the complete unit drawing, display assembly, board suffix and parameter backup during service. Before replacing a CNC unit, isolate the CNC and main cabinet power using the machine procedure; restoring the correct settings and checking controlled machine operation are part of the replacement process.
In this hardware arrangement, the display-control card contains a display-control CPU, display-control circuit and display-control memory. The CNC CPU card and axis-control card occupy separate functional positions, while the FROM/SRAM module provides control-software storage and battery-backed SRAM. CNC CPU DRAM sizes and axis counts therefore describe other components and must not be assigned as specifications of the offered display card.
The applicable basic-unit drawing families are A02B-0309-B50n, A02B-0311-B50n and A02B-0311-B51n, with n from 0 to 9. Other basic-unit arrangements use different hardware. Preserve the complete unit drawing, display assembly, board suffix and parameter backup during service. Before replacing a CNC unit, isolate the CNC and main cabinet power using the machine procedure; restoring the correct settings and checking controlled machine operation are part of the replacement process.
Controller platform reference: FANUC 0i-C display-control architecture. Match the complete board and basic-unit identity.
Technical downloads for A20B-3300-0281/04B: an original FANUC reference excerpt and an Apter Power installation planning guide.
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FANUC A20B-3300-0281/04B technical reference
Original FANUC excerpt - PDF, 6 pages, 44.7 KB. FANUC 0i-C base-design identification, display architecture and maintenance precautions. -
FANUC A20B-3300-0281/04B installation planning guide
Prepared by Apter Power - PDF, 5 pages, 26.2 KB. Identity, configuration, connection and controlled acceptance planning.
The original reference excerpt covers FANUC 0i-C base-design identification, display architecture and maintenance precautions. The planning guide is prepared by Apter Power; apply the complete manufacturer instructions and the stated applicability boundaries.
System and supply context: The offered identity is A20B-3300-0281/04B. The A20B-3300-0281 base design is the 8.4-inch color LCD display-control card in the applicable 0i-C hardware arrangement. Match /04B, the CNC basic-unit drawing number and installed hardware individually; base-design information is not a revision-specific interchangeability declaration. Accessories are included only when itemized in the quotation.
Platform applications: The following applications describe FANUC CNC display control functions. Match the complete A20B-3300-0281/04B identity to the installed system before selecting a replacement.
Platform applications: The following applications describe FANUC CNC display control functions. Match the complete A20B-3300-0281/04B identity to the installed system before selecting a replacement.
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CNC display-control maintenance
Review the A20B-3300-0281 base-design role in an 8.4-inch color LCD arrangement. Match the full A20B-3300-0281/04B marking and installed display assembly before selecting the offered card. -
Hardware identification
Record the CNC basic-unit drawing and separate display, CPU and axis-control positions. This prevents system CPU memory or axis-control specifications from being assigned to the display card. -
Display-system fault isolation
Review display-card seating and the associated display and inverter assembly as separate parts of the installed system. A display symptom alone does not identify which component needs replacement. -
Controlled CNC restoration
Preserve the CNC settings and machine-builder configuration before intervention. After approved replacement, verify display operation and controlled machine behavior before returning the system to production.
Prepare A20B-3300-0281/04B against the installed configuration and applicable FANUC instructions. Plan isolation and the resulting interruption of system operation before replacement.
Complete board marking
Keep A20B-3300-0281/04B intact. A base drawing number does not establish revision-specific electrical ratings or interchangeability with another suffix.
Basic-unit applicability
Match the CNC basic-unit drawing number to the applicable hardware arrangement. Do not select a board only from the broad 0i-C family name.
Display-size pairing
The A20B-3300-0281 base design serves an 8.4-inch color LCD. Do not substitute the different 10.4-inch or 7.2-inch display-card arrangement on that basis alone.
Isolation before replacement
Qualified personnel must isolate the CNC and main cabinet supplies and follow the machine-specific verification procedure. Turning off only the CNC can leave other sections energized.
Settings and retained data
Preserve the machine settings and a suitable backup before intervention. Battery-backed SRAM belongs to the CNC memory arrangement; display-card replacement is not a license to change unrelated parameters.
Controlled restart
Restore the approved configuration and verify correct display and machine response under the machine-builder test procedure. Do not proceed directly to automatic production after changing settings.
Alternative Names
A20B-3300-0281/04B
FANUC A20B-3300-0281/04B
Technical notes
Installation relationship: In this hardware arrangement, the display-control card contains a display-control CPU, display-control circuit and display-control memory. The CNC CPU card and axis-control card occupy separate functional positions, while the FROM/SRAM module provides control-software storage and battery-backed SRAM. CNC CPU DRAM sizes and axis counts therefore describe other components and must not be assigned as specifications of the offered display card.
Configuration: The offered identity is A20B-3300-0281/04B. The A20B-3300-0281 base design is the 8.4-inch color LCD display-control card in the applicable 0i-C hardware arrangement. Match /04B, the CNC basic-unit drawing number and installed hardware individually; base-design information is not a revision-specific interchangeability declaration.
Technical reference: FANUC Series 0i-MODEL C and 0i Mate-MODEL C Maintenance Manual, B-64115EN/02.
FAQ View All FAQ
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What display function is associated with A20B-3300-0281/04B?The A20B-3300-0281 base design controls an 8.4-inch color LCD in the applicable CNC hardware arrangement. Preserve the full /04B marking and match the installed display assembly independently.
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Is A20B-3300-0281/04B the CNC main CPU card?The A20B-3300-0281 base design is the display-control card. The applicable architecture uses a separate CNC CPU card, so CPU DRAM sizes and processor specifications must not be assigned to the display card.
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Does A20B-3300-0281/04B determine the number of controlled axes?The applicable architecture uses a separate axis-control card. The display-card reference does not establish the number of controlled axes; that requires the installed axis-control hardware and CNC configuration.
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What must be matched before installing A20B-3300-0281/04B?Match the complete board marking, including /04B, with the CNC basic-unit drawing and installed display assembly. The applicable base-design arrangement includes A02B-0309-B50n, A02B-0311-B50n and A02B-0311-B51n basic units, with n from 0 to 9; the family name alone is insufficient.
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Can A20B-3300-0281/04B be selected for a different LCD size?Do not select it solely on a general CNC family match. The A20B-3300-0281 base design is paired with an 8.4-inch color LCD, while the 10.4-inch and 7.2-inch arrangements use different display-card references.
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Does A20B-3300-0281/04B contain the CNC battery-backed program memory?In the applicable hardware architecture, the FROM/SRAM module is separate from the display-control card. FROM stores control software and SRAM is battery-backed; display-control memory must not be confused with that system memory.
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What electrical isolation is required before replacing A20B-3300-0281/04B?Follow the qualified-maintenance procedure for the complete machine and isolate both the CNC and main cabinet power. Turning off only the CNC can leave the servo section energized; verify the appropriate electrical and motion isolation before board work.
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What should be checked after replacing A20B-3300-0281/04B?Restore the approved settings, verify the display and confirm correct machine behavior through the machine-builder controlled-test procedure. After a parameter change, use the specified trial-operation precautions before automatic production.
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