Mighty Mule FM600 R4211 Circuit Board
The R5211 / R4211 control board family is a replacement main logic board used on select Mighty Mule, GTO, and Linear PRO swing gate operators. The board receives commands from remotes, keypads, safety devices, limits, and accessories, then controls gate operation through the motor and related outputs.
Control boards are commonly replaced after lightning or surge damage, water intrusion, failed accessory inputs, charging problems, or logic faults that prevent the gate from cycling correctly. A board problem can look similar to a bad battery, transformer, receiver, limit issue, or motor fault, so diagnosis matters before replacing an expensive board.
This CSV row needs extra attention because the product name references R4211 but the mfgid is R5211. These numbers are often cross-searched with PCB3040/red replacement board references, but compatibility must be confirmed by the operator model, board revision, connector layout, and manufacturer service instructions.
Compatible With
This part is commonly associated with the following Mighty Mule, GTO, and Linear PRO applications. Always match the part number, operator model, and parts diagram before ordering because older and newer generations may use similar-looking parts.
- Mighty Mule FM500 and FM502 where R4211/R5211 style replacement board is specified
- Mighty Mule MM560 and MM562 applications where specified
- Mighty Mule MM600 and MM660 applications where specified
- Mighty Mule 500 Series and 600 Series swing gate opener families where confirmed by parts diagram
- GTO/Linear PRO 2000XL, 3000XL, 3000XLS, 4000XL, and 4000XLS swing gate operators where R5211 service board is specified
- Select GTO/Linear PRO SW2500, SW2502, SW3000XL, SW3200XL, SW4000XL, and SW4200XL references where confirmed by current board documentation
- Not compatible with FM200, MM260, FM350/FM352, or MM360 when the manufacturer excludes those models
- Not compatible with PRO 2000XLS series where excluded by service-board listings
Features and Specifications
| Manufacturer | Linear / Mighty Mule / GTO |
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| Product Type | Main control board / logic board |
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| Part Number | R5211 in mfgid; product name references R4211 |
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| Related Board Reference | R4211 / PCB3040 red replacement board references where confirmed |
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| Application | Control board replacement for select swing gate operators |
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| Compatible Operator Type | Select Mighty Mule, GTO, and Linear PRO DC swing gate operators |
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| Voltage | Low-voltage DC operator control system |
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| Safety Monitoring | Confirm monitored safety and board generation requirements |
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Also Known As / Related Part Numbers
- R5211
- R4211
- R5211-01 related listing for specific SL2000B post-2017 applications - not assumed same for this row
- PCB3040
- Red replacement control board
- Mighty Mule R4211
- Mighty Mule R5211
- GTO R4211
- GTO R5211
- Linear PRO R5211
- FM500 control board
- FM502 control board
- FM600 control board
Technician Note
After a main board replacement, transmitters, limits, force settings, and accessory wiring may need to be reset or relearned. Photograph the original wiring and verify all safety inputs before powering the system.
Before Ordering
- Manually confirm whether this row should be R4211, R5211, or a superseded service board reference.
- Match the operator model and original board number.
- Compare connector layout and accessory terminals before installation.
- Confirm monitored safety device requirements for the operator generation.
- Plan to reprogram transmitters and reset limits after replacement.
Important Ordering Warnings
- The product name and mfgid conflict: name says R4211, mfgid says R5211.
- Do not assume all R4211, R5211, PCB3040, and red-board references are interchangeable without confirming the operator model and board revision.
Professional Advisory
Control board replacement involves electrical troubleshooting and moving gate equipment. If there is surge damage, burned components, missing safety devices, or uncertain wiring, have a qualified gate technician service the operator.
Product Questions and Answers
Why does this listing mention both R5211 and R4211?
The CSV name references R4211 while the mfgid is R5211. These are commonly related search references, but the exact service board should be verified before upload or ordering.
Which operators commonly use this board family?
It is commonly associated with FM500, FM502, MM560, MM562, MM600, MM660, and select GTO/Linear PRO XL/XLS swing gate operators where specified.
Will remotes need to be programmed after board replacement?
Yes. Remote controls and some settings may need to be relearned after a main board replacement.
Is this board for FM350 or MM360?
No. Manufacturer listings commonly exclude FM350/FM352 and MM360 from this board family.
Can a bad transformer look like a bad control board?
Yes. Battery, transformer, fuse, wiring, receiver, and motor issues can mimic board failure, so diagnosis is recommended before replacing the board.
