Linear Pro Access R4211 Circuit Board
The Linear / GTO / Mighty Mule R4211 and R5211 board references are commonly searched together for replacement control boards used in select swing gate operator systems. This board functions as the main controller for the gate opener: it receives commands from remotes, keypads, receivers, loops, exit devices, and safety accessories, then controls motor movement, timing, charging, and gate sequencing.
This row needs careful review because the visible product name says R4211 while the mfgid says R5211. Depending on production generation and supplier reference, those numbers may be related, but they should not be treated as automatically identical without checking the board label and connector layout. A board mismatch can cause incorrect motor behavior, failed accessory wiring, charging issues, or a non-operating gate.
Common replacement reasons include surge damage, lightning damage, reversed battery leads, water or insect contamination, burned terminals, intermittent operation, or a board that no longer responds to known-good controls. Before replacing the board, inspect the battery, transformer, solar input, fuses, wiring harness, and accessories because an external short can damage the new board as soon as it is installed.
Compatible With
- Mighty Mule FM500 swing gate opener
- Mighty Mule FM502 dual swing gate opener
- Mighty Mule MM560 and MM562 swing gate operator families
- Mighty Mule MM600 and MM660 swing gate operator families
- Select GTO / Linear PRO swing gate operators when the board label and parts diagram match
- Commonly searched with PRO-SW2500, PRO-SW2502, PRO-SW3000XL, PRO-SW3200XL, PRO-SW4000XL, and PRO-SW4200XL references
- Single and dual swing gate applications when supported by the correct board generation
Features & Specifications
| Manufacturer | Linear / GTO / Mighty Mule |
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| Product Type | Replacement control board |
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| Part Number | R5211 mfgid; R4211 product-name reference |
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| Application | Select swing gate operator control boxes |
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| Compatible Operator Type | Battery-powered swing gate openers |
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| Common Voltage | 12 VDC gate operator control system |
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| Related Board References | R4211, R5211, PCB3040 in some listings |
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| Notes | Verify board label, connector layout, and operator model |
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Also Known As / Related Part Numbers
- R4211
- R5211
- R4211/R5211
- PCB3040
- GTO R4211
- GTO R5211
- Mighty Mule R4211
- Mighty Mule R5211
- Linear Pro Access R4211
- FM500 circuit board
- FM502 circuit board
Technician Note
Do not choose a control board by appearance alone. Match the printed board number, operator model, wiring terminals, and original system generation before installing.
Before Ordering Checklist
- Confirm the exact board number printed on the old board
- Confirm operator model and single or dual gate setup
- Inspect batteries, transformer, solar panel, and fuses before installing
- Label accessory wires before removing the old board
- Confirm monitored safety and accessory wiring requirements
- Do not use this board for FM350/FM352 unless a parts diagram specifically confirms it
Important Ordering Warnings
- Uploaded row has an R4211/R5211 naming conflict. Manual verification is recommended.
Professional Advisory
Circuit board replacement involves low-voltage controls but can still damage equipment if miswired. For surge damage, unknown wiring, or unsafe gate movement, have a qualified gate technician service the system.
Product Questions & Answers
Is this board labeled R4211 or R5211?
The uploaded row name says R4211 while the mfgid says R5211. These numbers are commonly searched together, but the board label and connector layout should be verified.
Which Mighty Mule openers commonly use the R4211 board?
R4211 is commonly listed for FM500, FM502, MM560, MM562, MM600, and MM660 operator families.
Is this board for FM350 or FM352 operators?
No. FM350/FM352 systems generally use different board references and should not be treated as R4211/R5211 replacements without parts diagram confirmation.
Will accessories need to be reprogrammed after board replacement?
Transmitters, limits, auto-close, gate sequencing, obstruction settings, and accessory inputs may need to be checked or reprogrammed after replacing a board.
What commonly causes this board to fail?
Common causes include lightning damage, power surges, reversed battery wiring, water intrusion, insect damage, and shorted accessory wiring.
