Genuine LiftMaster 050DCJCWFRDMC receiver logic board — the Security+ 2.0 DC Wi-Fi board for the LJ8950W light-duty commercial jackshaft operator for rolling doors. The LJ8950W is the rolling-door version of the LJ8900W: same motor, transformer, travel module and mounting, but a rolling-door logic board and a sprocket-and-chain drive. The board number is printed next to the yellow learn button.
Not the sectional board. The LJ8900W (sectional door) takes the 050DCJCWFSDMC and the DDO8900W dock door operator the 050DCDDOWFMC. The three boards are not interchangeable even though the operators look alike.
Specifications
| Part number | 050DCJCWFRDMC |
|---|---|
| LiftMaster description | Receiver Logic Board, Wi-Fi, Rolling Door |
| Learn button | Yellow — Security+ 2.0, tri-band 310 / 315 / 390 MHz |
| Connectivity | Wi-Fi, myQ |
| Fits | LiftMaster LJ8950W (LJ8950WMC) |
| Condition | Genuine LiftMaster OEM, new |
Which operators use it
| Operator | Board | Parts page |
|---|---|---|
| LJ8950W light-duty jackshaft, rolling door | 050DCJCWFRDMC — this board | LJ8950W parts |
| LJ8900W light-duty jackshaft, sectional door | 050DCJCWFSDMC | LJ8900W parts |
| DDO8900W dock door operator | 050DCDDOWFMC | DDO8900W parts |
Parts often replaced with it
485LM backup battery · 041B8861 travel module · 893LM remote
Is the board actually the problem?
The logic board is the most over-ordered part on a commercial operator. Work down this list before you buy:
| Symptom | Check first |
|---|---|
| Dead, no lights | Supply and transformer, then the board |
| Runs on AC but not on battery, or beeps every few seconds | The 485LM battery |
| Lost Wi-Fi / myQ | Router and app setup, not the board |
| Runs a few inches and stops, or the curtain overruns | Door spring balance and the chain drive, then the travel module, then the board |
| Dead after a storm | The board — fit surge protection with it |
After fitting
Set the travel limits, learn the remotes, re-add the operator in the myQ app and re-test the entrapment protection.
Fit surge protection when you fit the board. Lightning and utility surges are the most common reason a commercial operator board is replaced, and a new board on the same unprotected supply is at the same risk. The MOV kit on the electrical box is the first line; a proper surge arrester on the supply is the second.
Related
LJ8950W parts · LJ8900W parts · all LiftMaster commercial door parts
Not sure which board you need? Send a photo of the number printed on your existing board to parts@gatehousesupplies.com or call 866-965-5599. We would rather confirm it than have you fit the wrong board.
