Linear ACP00878 MDKP MegaCode Exterior Wireless Keypad
The MDKP is a wireless keypad transmitter in the Linear MegaCode radio-control family. Instead of wiring directly to a gate operator input like a hardwired keypad, it sends a radio signal to a compatible Linear MegaCode receiver after the correct PIN is entered. The receiver then triggers the gate or garage door operator through its normal relay connection or built-in radio input.
This keypad is useful when a customer wants code-based entry without trenching wire to a pedestal or wall location. It is commonly installed at driveways, walk gates, garages, and service entrances where a radio receiver is already in use. The number of usable access codes depends on the receiver or controller, not just the keypad. Range also depends on receiver placement, antenna location, metal structures, battery condition, and site interference.
Compatible With
Compatible with Linear MegaCode receiver systems and access controllers that accept MDKP wireless keypad transmissions.
- Linear MegaCode radio receiver applications for gates and garage doors
- Linear AP-3 AccessPro receiver/controller applications where MDKP support is provided
- Compatible Linear gate operator receiver installations using MegaCode format
- Compatible Linear garage door receiver installations using MegaCode format
- Residential driveway gate systems using a Linear MegaCode receiver relay
- Garage door and access-control applications where the receiver stores the keypad code or transmitter code
- Not compatible with unrelated radio formats such as standard fixed-code, Security+ 2.0, Security+ 3.0, or other brands unless an appropriate Linear MegaCode receiver is installed
Features & Specifications
| Manufacturer | Linear |
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| Product Type | Exterior wireless keypad transmitter |
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| Part Number | ACP00878 |
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| Model Reference | MDKP |
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| Radio Format | Linear MegaCode |
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| PIN Length | 1 to 6 digits |
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| Range | Up to 250 ft line of sight in listed references, site conditions vary |
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| Power | 9 volt lithium battery in listed references |
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| Application | Wireless keypad entry for compatible gate and garage receivers |
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| Mounting | Indoor or outdoor keypad mounting when installed according to instructions |
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Also Known As / Related Part Numbers
- ACP00878
- MDKP
- Linear MDKP
- MegaCode exterior wireless keypad
- Linear exterior wireless keypad
- MDKP wireless keypad transmitter
- AP-3 compatible keypad reference
- Linear MegaCode keypad
Technician Note
When a wireless keypad has poor range, check battery condition, receiver antenna placement, nearby metal, and radio interference before replacing the keypad.
Before Ordering Checklist
- Confirm the receiver uses Linear MegaCode format.
- Verify whether the receiver stores keypad codes or transmitter IDs.
- Check the number of codes supported by the receiver or controller.
- Plan the mounting location for weather exposure and radio range.
- Use the proper battery type and reprogram according to the receiver instructions.
Important Ordering Warnings
This is not a universal wireless keypad. It must be used with a compatible Linear MegaCode receiver or access-control system.
Professional Advisory
Wireless access control should be tested from the actual mounting location before final installation. For shared entrances or commercial sites, have a technician set up code management and receiver programming.
Product Q&A
What radio format does the MDKP use?
The MDKP is part of the Linear MegaCode wireless radio-control family.
Can the MDKP work without a receiver?
No. It must transmit to a compatible Linear MegaCode receiver or controller.
How many PIN codes can it use?
The keypad can transmit codes, but the number of usable stored codes depends on the receiver or access controller.
Is it wired to the gate operator?
No. It is a wireless keypad transmitter, so the receiver is the device wired to the operator or controller.
What affects operating range?
Battery condition, receiver antenna location, metal posts, walls, vehicles, and radio interference can all affect range.
