Shure A400MB User manual

A400MB
Mute Button
Shure A400MB online user guide. Includes installation instructions, DIP switch settings, specifications, and more.
Version: 1.0 (2021-G)

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Table of Contents
A400MB Mute Button 3
IMPORTANT SAFETY INSTRUCTIONS 3
Mute Button Overview 4
A400MB Parts 4
What's in the Box 5
Installing the Mute Button 6
Phantom Power 8
LED Logic 8
A400MB Pin Assignments 8
DIP Switches 9
Accessing the DIP Switches 9
DIP Switch Settings 11
Connections and Signal Flow 12
Optional Accessories 14
Specifications 14
Important Product Information 15
Information to the user 15

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A400MB 
Mute Button
IMPORTANT SAFETY INSTRUCTIONS
READ these instructions.
KEEP these instructions.
HEED all warnings.
FOLLOW all instructions.
DO NOT use this apparatus near water.
CLEAN ONLY with dry cloth.
DO NOT block any ventilation openings. Allow sufficient distances for adequate ventilation and install in accordance
withthemanufacturer’sinstructions.
DONOTinstallnearanyheatsourcessuchasopenflames,radiators,heatregisters,stoves,orotherapparatus(in
cluding amplifiers) that produce heat. Do not place any open flame sources on the product.
DO NOT defeat the safety purpose of the polarized or grounding type plug. A polarized plug has two blades with one
wider than the other. A grounding type plug has two blades and a third grounding prong. The wider blade or the third
prongareprovidedforyoursafety.Iftheprovidedplugdoesnotfitintoyouroutlet,consultanelectricianforreplace
ment of the obsolete outlet.
PROTECT the power cord from being walked on or pinched, particularly at plugs, convenience receptacles, and the
point where they exit from the apparatus.
ONLY USE attachments/accessories specified by the manufacturer.
USE only with a cart, stand, tripod, bracket, or table specified by the manufacturer, or sold with the apparatus. When a
cart is used, use caution when moving the cart/apparatus combination to avoid injury from tip-over.
UNPLUG this apparatus during lightning storms or when unused for long periods of time.
REFER all servicing to qualified service personnel. Servicing is required when the apparatus has been damaged in any
way, such as power supply cord or plug is damaged, liquid has been spilled or objects have fallen into the apparatus,
the apparatus has been exposed to rain or moisture, does not operate normally, or has been dropped.
DO NOT expose the apparatus to dripping and splashing. DO NOT put objects filled with liquids, such as vases, on the
apparatus.
The MAINS plug or an appliance coupler shall remain readily operable.
The airborne noise of the Apparatus does not exceed 70dB (A).
ApparatuswithCLASSIconstructionshallbeconnectedtoaMAINSsocketoutletwithaprotectiveearthingconnec
tion.
To reduce the risk of fire or electric shock, do not expose this apparatus to rain or moisture.
Do not attempt to modify this product. Doing so could result in personal injury and/or product failure.
Operate this product within its specified operating temperature range.

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This symbol indicates that dangerous voltage constituting a risk of electric shock is present within this unit.
Thissymbolindicatesthatthereareimportantoperatingandmaintenanceinstructionsintheliteratureaccom
panying this unit.
Mute Button Overview
The Shure A400MB mute button accessory is compatible with the MX395-LED and MX400SMP, with a low profile design ideal
for surface mounting to boardroom tables. The switch adds a programmable button for microphone LEDs and local or remote
mute control with Shure products or third-party control systems.

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A400MB Parts
①Color Ring
Place around drilled hole to match microphone color.
②Mute button
Touch to mute microphone.
③Mute button cable
Connect to the plug-on adapter.
④Spacer
Use the spacer to adjust to different table thicknesses. Pull the mute button cable through the gap.
*⑤Wingnut
Use to tighten the mute button under the table. Included with MX395 and MX400SMP only.
⑥Plug-on adapter
Sits underneath the table surface, provides power, and controls signals to the mute button.
What's in the Box
Mute button
Plug-on adapter
Spacer
Color rings (3)

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Assembly kit (90A48840):
Flathead screwdriver
Cable ties (2)
Strain reliefs (2)
Terminal plug
Installing the Mute Button
The mute button fits in tables that are between 15 to 30 mm (.59 to 1.18 inches) thick.
Drill a 30 mm (1 1/8 inch) hole in the table.
Place the color ring around the hole.
Insert the mute button and its cable into the hole.
Note: Remove the protective blue film from the top of the mute button.
Insert a compatible microphone into the mute button.
Slide the spacer onto the mute button so the rubber side is flush against the bottom of the table.
Pull the cable through the side opening on the spacer.
Slideawingnutunderthespacerandtightenbyhand,andthenturnanadditional90degrees(¼turn).Donotover
tighten the wingnut.
Connect the adapter to the 5-pin XLR microphone.
Plug the mute button cable into the adapter.
Wire a cable to the 6-pin block connector and connect to the adapter.

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Phantom Power
The mute button requires a 48 V phantom power source.
LED Logic
Use the included 6-pin block connector to wire the microphone to a DSP or other logic-enabled device, such as the ANI22-
BLOCK or ANI4IN-BLOCK.
A400MB Pin Assignments
6-pin block connector
Note: The block connector screw terminals face downwards so they are accessible from under the table after installation.
Logic Ground
Switch (sent from microphone)
LED (received by microphone)
Audio Ground
Audio -

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6. Audio +
DIP Switches
Accessing the DIP Switches
Disconnect the adapter from the A400MB and any logic devices before disassembly. Remove the 2 Phillips head P1 size
screws from the base of the adapter.

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DIP Switch Settings
Use the DIP switches to configure logic settings and mute button behavior. DIP switches are down by default, and settings can
only be changed when the device is powered off. Changes take effect when the mute button is powered back on.
DOWN (default) UP
1Toggle Momentary
2Push-to-Mute Push-to-Talk
3Local Mute Logic Control
4Green LED = talk, Red LED = mute Red LED = talk, Green
LED = mute
5 and 6 work together to make 4 touch
sensitivity settings: 1 (lowest) - 4 (highest)
5 UP, 6 DOWN = 1
5 DOWN, 6 DOWN = 2 (default)
5 DOWN, 6 UP = 3
5 UP, 6 UP = 4
Note: Higher sensitivity settings are more likely to cause accidental touch responses.
Connecting to a Logic-Enabled Device
Use these settings if connecting the microphone to a logic-enabled device, such as the ANI4IN-BLOCK or ANI22-BLOCK:
Connect the A400MB LED (input) to the ANI LED (output) to illuminate the microphone LED when the logic signal
changes.*
Connect the A400MB switch (output) to the ANI switch (input) to send a logic signal from the A400MB to the ANI.*
Set DIP switch 3 to up. This disables local muting. Pressing the A400MB sends a logic signal (the microphone passes
audio regardless of whether the button is pressed or not).
Set DIP switches 1 and 2 to configure how the A400MB sends SWITCH OUT logic.

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5. Set DIP switch 4 to configure microphone LED color.
*Note:TheA400MBconnectorplugsinupsidedownrelativetotheANIconnector.Thecableshouldbewiredina1:1pinoutconfigurationwhenbothconnec
tors face the same direction.

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Connections and Signal Flow
①MX395-LED:
Runs the audio signals and features logic connections to receive logic mute and LED control signals.
②A400MB:

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Adds programmable button for microphone LEDs and mute control, and connects to analog input.
③ANI22IN-BLOCK:
Connects microphones to the audio network and converts analog to Dante.
④Network Switch:
Provides Power over Ethernet (PoE) to the ANI22 and P300, while also supporting all other Dante-enabled audio equipment.
⑤P300:
Provides IntelliMix processing for videoconferencing software.
⑥Computer:
Connects to P300 USB to provide mute synchronization with videoconferencing software, such as Microsoft Teams or Zoom.
Visit www.shure.com for more information on how to configure the ANI22IN-BLOCK and P300.
Optional Accessories
Remote Mounting Kit A400MB-MOUNT
Specifications
Connector Type
6-pin block connector
Power Requirements
Phantom Power
Power Consumption
5mW,maximum
Weight
113g(0.25lbs)
Output Configuration
Active Balanced
Logic Connections
LED IN Activelow(≤1.0V),TTLcompatible.Absolutemaximumvoltage:0.7Vto50V.
LOGIC-
OUT
Activelow(≤0.5V),sinksupto20mA,TTLcompatible.Absolutemaximumvoltage:0.7Vto24V(upto50V
through3kΩ).

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Environmental Conditions
Operating Temperature 5to45°C(41to113°F)
Storage Temperature 29to74°C(20.2to165°F)
Relative Humidity 0-95%
Dimensions
Base 3.74x3.74x1.06in.(94.96x94.96x27.04mm)HxWxD
Mute Button 1.54x1.54x0.2in.(39.02x39.02x5.02mm)HxWxD
Mute Button Tube 0.87x0.87x3.03in.(22x22x76.98mm)HxWxD
Grommet 1.97x1.97x0.31in.(49.97x49.97x8mm)HxWxD
Spacer 1.93x1.93x0.05in.(49x49x1.2mm)HxWxD
Important Product Information
The equipment is intended to be used in professional audio applications.
Changes or modifications not expressly approved by Shure Incorporated could void your authority to operate this equipment.
Note: Testingisbasedontheuseofsuppliedandrecommendedcabletypes.Theuseofotherthanshielded(screened)cabletypesmaydegradeEMCper
formance.
Please follow your regional recycling scheme for batteries, packaging, and electronic waste.
Information to the user
This device complies with part 15 of the FCC Rules. Operation is subject to the following two conditions:
This device may not cause harmful interference.
This device must accept any interference received, including interference that may cause undesired operation.
Note: This equipment has been tested and found to comply with the limits for a Class B digital device, pursuant to part 15 of
theFCCRules.Theselimitsaredesignedtoprovidereasonableprotectionagainstharmfulinterferenceinaresidentialinstalla
tion. This equipment generates uses and can radiate radio frequency energy and, if not installed and used in accordance with
the instructions, may cause harmful interference to radio communications. However, there is no guarantee that interference will
not occur in a particular installation. If this equipment does cause harmful interference to radio or television reception, which
can be determined by turning the equipment off and on, the user is encouraged to try to correct the interference by one or more
of the following measures:
Reorient or relocate the receiving antenna.
Increase the separation between the equipment and the receiver.
Connect the equipment to an outlet on a circuit different from that to which the receiver is connected.
Consult the dealer or an experienced radio/TV technician for help.
This Class B digital apparatus complies with Canadian ICES-003. Cet appareil numérique de la classe B est conforme à la
norme NMB-003 du Canada.
CAN ICES-003 (B)/NMB-003 (B)
The CE Declaration of Conformity can be obtained from: www.shure.com/europe/compliance

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Authorized European representative:
Shure Europe GmbH
Global Compliance
Jakob-Dieffenbacher-Str. 12
75031 Eppingen, Germany
Phone: [phone]
Email: [email protected]
www.shure.com
This product meets the Essential Requirements of all relevant European directives and is eligible for CE marking.
The CE Declaration of Conformity can be obtained from Shure Incorporated or any of its European representatives. For contact
information please visit www.shure.com