LiftMaster MAXUM JDC Jackshaft DC Commercial Door Operator
The LiftMaster MAXUM JDC is the standard jackshaft DC commercial operator in the MAXUM family. It mounts for side-shaft operation and is used when the commercial door application calls for jackshaft operation rather than a trolley or hoist layout.
MAXUM DC operators include modern commercial controls, monitored safety device requirements, and myQ Facility capability where configured. The JDC should be matched to the door by application, not selected only because an older operator was jackshaft style.
For replacement jobs, compare the existing operator type carefully. RJDC adds manual release, JHDC is a hoist jackshaft model, and TDC is a trolley model. Ordering the wrong MAXUM style can create installation and safety-device problems.
Features and Specifications
| Manufacturer | LiftMaster |
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| Part Number | MAXUM-JDC |
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| Product Type | Commercial door operator |
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| Operator Style | Jackshaft DC |
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| Commercial Series | MAXUM DC |
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| Motor Type | 24VDC motor drive platform |
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| Controls | 3-button control with 4-line LCD display on compatible MAXUM models |
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| Connectivity | myQ Facility capable where configured |
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| Safety Devices | Requires monitored commercial entrapment protection per application |
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| Handing | Dual handing on MAXUM platform where specified |
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Compatible With
- Commercial door applications requiring a standard jackshaft DC operator
- Commercial sectional or rolling-style doors only when the door, shaft arrangement, lift type, weight, and duty cycle match LiftMaster JDC application limits
- LiftMaster MAXUM accessory family including monitored commercial photo eyes such as CPS-U
- Approved LiftMaster monitored safety accessories required by the installation
- Select MAXUM cable tension monitor applications using approved LiftMaster CTM kits where required
- Related MAXUM DC operator family models: RJDC, JHDC, and TDC for comparison only
- Not a direct substitute for RJDC, JHDC, or TDC unless the application and hardware layout match
Also Known As / Related Part Numbers
- MAXUM-JDC
- JDC
- LiftMaster JDC
- LiftMaster MAXUM JDC
- MAXUM jackshaft DC operator
- MAXUM DC commercial jackshaft operator
- CPS-U - related commercial photo eyes
- JDC - related MAXUM jackshaft DC model
- RJDC - related MAXUM jackshaft with manual release model
- JHDC - related MAXUM jackshaft hoist DC model
- TDC - related MAXUM trolley DC model
- K41-0156-000 - related left cable tension monitor for select MAXUM models
- K41-0157-000 - related right cable tension monitor for select MAXUM models
- CHAINGUARD3IN / CHNGUARD - related chain guard accessories where applicable
Technician Notes
- MAXUM DC operators use commercial door controls and monitored safety devices. Confirm voltage, phase, mounting type, door construction, and required accessories before ordering.
- MAXUM models are not universal substitutes for older mechanical commercial operators. Match the operator type to the door: jackshaft, jackshaft with manual release, jackshaft hoist, or trolley.
- Commercial door installation and wiring should be completed by a qualified commercial door technician. Do not bypass monitored photo eyes, edges, cable tension monitoring, or other required safety devices.
Before Ordering Checklist
- Confirm exact MAXUM model required: RJDC, JDC, JHDC, or TDC.
- Confirm door type, shaft arrangement, lift type, door weight, cycle needs, and mounting location.
- Verify voltage/phase and job-site wiring requirements before ordering.
- Confirm required monitored safety devices such as CPS-U photo eyes, light curtains, edges, and cable tension monitors when applicable.
- Check whether chain guard, hoist chain, manual release hardware, or other accessories are required for the installation.
Professional Advisory
Commercial door operators involve moving-door hazards, monitored entrapment protection, and line-voltage wiring. A qualified commercial door technician should verify the application, install the operator, set limits and forces, and test all safety devices before the door is placed in service.
Product Questions and Answers
What type of door uses the MAXUM JDC?
The JDC is used for commercial door applications that require a jackshaft DC operator and that meet LiftMaster application limits for the door, shaft, lift type, and duty requirements.
Is JDC the same as JHDC?
No. JDC is a jackshaft DC operator, while JHDC is a jackshaft hoist DC operator. Confirm whether a hoist configuration is required before ordering.
What safety accessories are commonly used with JDC?
MAXUM installations commonly use monitored commercial photo eyes such as CPS-U and other approved monitored safety devices required by the application and local code.
