Mighty Mule FM502 Parts - RVCTBD50 Rev Counter Board
The RVCTBD50 is a replacement revolution counter board for selected Mighty Mule, GTO and Linear PRO swing gate opener arms. In these systems, the rev counter reports motor movement back to the control board so the operator can track travel. When the rev counter signal is missing or unstable, the opener may not know how far the arm has moved, which can lead to fault codes, short travel, one arm stopping, or inconsistent operation.
This board is commonly listed for Mighty Mule FM350, FM352, FM500, FM502, FM600 and related MM500 series arms, as well as GTO PRO 2500 series references. On dual gate systems, the master and second arm circuits should be diagnosed correctly before replacing parts, because a wiring issue, damaged harness, control board problem, or storm damage can mimic a failed rev counter.
Replacement is usually considered after troubleshooting points to the arm's rev counter board. Common reasons include lightning damage, water intrusion, cracked board, damaged sensor wiring, or repeated error beeps that identify a master or second arm rev counter failure. Always compare the board to the original and inspect the arm harness before ordering.
Compatible With
The RVCTBD50 rev counter board is commonly associated with these swing gate opener applications:
- Mighty Mule FM350 and FM352 swing gate operator arms
- Mighty Mule FM500 and FM502 swing gate operator arms
- Mighty Mule FM600 swing gate operator arm references
- Mighty Mule MM500 and MM502 series references where the board matches
- GTO / Linear PRO 2500, 2502 and 2550 family references where specified
- GTO / Mighty Mule 2000XL family references found in some replacement part listings
- Select FM360, FM560, FM562, FM660 and related references may appear in aftermarket searches; verify original board before ordering
- Not a universal control board and not the main operator control board
Features & Specifications
| Manufacturer | GTO / Linear PRO / Mighty Mule family |
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| Product Type | Rev counter board |
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| Part Number | RVCTBD50 |
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| Application | Motor movement feedback inside select swing gate operator arms |
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| Compatible Operator Type | Select linear arm swing gate openers |
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| Function | Reports motor revolutions/travel feedback to the control board |
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| Notes | Confirm arm model, board style and harness before ordering |
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Also Known As / Related Part Numbers
- RVCTBD50
- LIN-RVCTBD50
- GTO RVCTBD50
- Mighty Mule RVCTBD50
- rev counter board
- revolution counter board
- FM350 rev counter
- FM500 rev counter
- FM502 rev counter
- MM500 rev counter board
Technician Note
On dual gate systems, diagnose which arm is reporting the fault before ordering. Swapping parts without identifying master versus second arm feedback can lead to replacing the wrong component.
Before Ordering Checklist
- Confirm the opener model and arm series use RVCTBD50.
- Compare the original board, connector and mounting style.
- Check the arm harness for damage before replacing the board.
- Review beeping/error code pattern to identify master or second arm faults.
- Inspect for water intrusion or lightning damage that may also affect the main control board.
Important Ordering Warnings
RVCTBD50 is a rev counter feedback board, not the main control board. Similar aftermarket boards may list many models; use the original board and operator parts diagram as the deciding factor.
Professional Advisory
If the opener has electrical storm damage, repeated fuse failure, or unsafe movement, have the system diagnosed by a qualified gate technician before replacing electronic parts.
Product Questions & Answers
What does the RVCTBD50 rev counter board do?
It sends motor movement feedback to the control board so selected Mighty Mule and GTO swing operators can track arm travel.
Which models commonly use RVCTBD50?
It is commonly listed for FM350, FM352, FM500, FM502, FM600, MM500/MM502 series and GTO PRO 2500 family references where the original board matches.
Is RVCTBD50 the main control board?
No. It is a rev counter board inside or associated with the operator arm, not the main control board in the control box.
What symptoms can indicate a bad rev counter board?
Possible symptoms include beeping error codes, one arm failing to travel correctly, short movement, lost position, or master/second arm rev counter failure indications.
Should I replace this board after lightning damage?
Only after diagnosis. Lightning can damage the rev counter board, arm harness and main control board, so the whole low-voltage system should be inspected.
