NICE / APOLLO MX4920 Mercury 310 Controller
The Nice Apollo MX4920 Mercury 310 controller is the main control board used in compatible modern Nice Apollo residential gate operator systems. It manages gate movement commands, accessory inputs, monitored safety devices, limits, operator behavior, and receiver/accessory communication for systems built around the Mercury 310 platform. In service work, this board is often considered when a compatible operator has a damaged controller, failed input/output behavior, unreliable accessory communication, or a board that has been damaged by surge, water intrusion, insects, or wiring problems. Correct board identification matters because Apollo systems have used several controller families over the years, including older 835/836, 636, 936, 1050, Mercury 310, and SmartCNX-style platforms. The MX4920 should be matched to the existing enclosure, operator model, actuator type, monitored safety requirements, and accessory setup before installation.
Compatible With
- Compatible with Nice Apollo Mercury 310 control systems when MX4920 is the installed board part number.
- Commonly used in CBOX310, ACBOX310, and SolarBOX310 style Mercury 310 controller packages.
- Commonly associated with compatible Nice Apollo residential linear swing actuator systems, including select Apollo 816/816X and Titan 912L style packages when built for Mercury 310 control.
- Used in the Nice Juno 310 slide gate operator parts family as the Mercury 310 control board.
- Supports compatible Nice BlueBUS accessories and OXI receiver architecture when configured according to the operator manual.
- Some aftermarket references mention older 835/836 replacement searches; verify the exact operator, enclosure, and conversion requirements before treating MX4920 as a replacement for an older board.
Features & Specifications
| Manufacturer | Nice Apollo / HySecurity |
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| Product Type | Gate operator control board |
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| Part Number | MX4920 |
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| Control Platform | Mercury 310 |
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| Application | Compatible residential Nice Apollo swing and slide gate operator control systems |
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| Safety Monitoring | Designed for UL325-compliant monitored safety setups when installed and programmed correctly |
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| Accessory Support | Compatible Nice BlueBUS and OXI accessory architecture where supported by the system |
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| Notes | Match board number, enclosure, actuator/operator model, limits, and accessory wiring |
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Also Known As / Related Part Numbers
Technician Note
Match this part by the exact manufacturer part number, installed operator or enclosure, and the current parts diagram. Similar Nice Apollo parts can look close but differ by controller platform, cable length, frequency, mounting pattern, enclosure layout, or safety-device requirements.
Before Ordering Checklist
- Confirm the original part number on the installed component or parts diagram.
- Confirm the operator model, control box, accessory system, or enclosure family.
- Check voltage, frequency, code capacity, cable length, mounting pattern, and included hardware where applicable.
- Inspect nearby wiring, harnesses, batteries, brackets, covers, and safety devices for related damage.
- Do not substitute similar-looking parts unless the current Nice Apollo parts diagram confirms the replacement.
Professional Advisory
Gate operator electrical work, control-board replacement, battery/charging repairs, and access-control wiring should be handled carefully. Do not bypass monitored safety devices, fuses, grounding, photo eyes, or safety edges. If the gate moves unpredictably, has exposed wiring, or involves high-voltage diagnosis, use a qualified gate technician.
Product Q&A
Is MX4920 the Mercury 310 control board?
Yes. MX4920 is commonly listed as the Nice Apollo Mercury 310 controller for compatible Mercury 310 gate operator systems.
Does MX4920 fit both swing and slide operators?
It can appear in compatible Mercury 310 swing systems and the Juno 310 slide operator family, but fitment depends on the operator package and enclosure design.
Can MX4920 replace an older Apollo 835 or 836 board?
Some references mention those older board numbers, but this should be treated as a conversion or compatibility question, not an automatic drop-in replacement. Verify the operator, enclosure, harnessing, and safety requirements.
Will this board work with BlueBUS photo eyes?
The Mercury 310 platform supports compatible Nice BlueBUS accessories when wired and programmed according to the correct manual.
What should be checked after board replacement?
Limits, force settings, monitored safety devices, receiver programming, accessory inputs, and gate travel must be checked after replacement. A qualified technician should handle unsafe or high-voltage conditions.
