NICE / APOLLO MX4711, Buzzer, Piezo, 100dB - Alarm for ACBOX
The NICE Apollo MX4711 is a piezo buzzer alarm commonly listed as a 100 dB audible device for compatible ACBOX control box applications. It is used to provide a clear audible indication when the control system needs to alert the installer, property owner, or technician to an alarm, fault, or other programmed condition. Although it is a small component, it can be important during troubleshooting because audible alerts help identify that the control box is responding to a condition.
Do not treat MX4711 as a universal gate alarm or as a monitored safety device. It is an audible buzzer component for supported ACBOX assemblies. If the buzzer is sounding, the right repair is to identify the cause of the alert, not to bypass or unplug the buzzer to silence the system.
Compatible With
Commonly listed for Nice Apollo ACBOX applications where the parts diagram calls for MX4711. May appear in Apollo/Nice parts pages for Vanguard/3501-related categories, but fitment should be confirmed by the installed control box and ACBOX wiring layout.
Features and Specifications
| Manufacturer | NICE Apollo / Nice HySecurity |
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| Product Type | Piezo buzzer alarm |
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| Part Number | MX4711 |
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| Sound Level | 100 dB commonly listed |
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| Application | Audible alarm/alert device for compatible ACBOX systems |
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| Compatible Operator Type | Select Nice Apollo ACBOX control box applications |
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| Notes | Not a universal siren or monitored safety device |
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Also Known As / Related Part Numbers
- MX4711
- NICE-MX4711
- Buzzer Piezo 100dB
- ACBOX buzzer alarm
- Nice Apollo ACBOX alarm buzzer
- Related audible part: Apollo 911 siren, verify application before substituting
Technician Note
A continuously sounding buzzer usually points to an active condition. Check the control board display, event history, safety inputs, battery condition, and alarm logic before replacing or disconnecting the buzzer.
Before Ordering
- Confirm the installed control box uses the MX4711 buzzer.
- Check whether the issue is the buzzer or the condition triggering it.
- Compare connector, mounting, and wiring style.
- Do not substitute for a monitored safety device.
- Do not silence active alarms without diagnosing the cause.
Professional Advisory
Audible alarm devices help communicate unsafe or fault conditions. If the gate is moving unexpectedly or showing safety faults, have the system inspected by a qualified technician.
Product Questions and Answers
What is MX4711?
MX4711 is a 100 dB piezo buzzer alarm commonly listed for Nice Apollo ACBOX applications.
Is this a siren for every gate opener?
No. It should be used where the ACBOX or operator parts diagram calls for the MX4711 buzzer.
What problems can a failed buzzer cause?
A failed buzzer may prevent audible alerts for faults, alarms, or operating conditions that the control box is designed to announce.
Can the operator run without the buzzer?
The operator may still move depending on the system, but missing audible alerts can hide important faults or safety-related warnings.
Is MX4711 the same as Apollo 911 siren?
No. Both are audible devices, but MX4711 is the piezo buzzer alarm for ACBOX references, while 911 is a separate UL siren part.
