3M A121 installation instructions Description, Additional Material Required, System Requirements

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Noise Reduction Module

Model A121

Installation Instructions

Description

The 3M Noise Reduction Module (3M part number 78-9236-6403-7) improves the inbound intelligibility of an intercom system by reducing environmental background noise from vehicles, airplanes, noisy intersections, etc.

Additional Material Required

•18 - 22 AWG twisted - shielded pair audio wire

•2 mounting screws and appropriate wall anchors

Important: The 3M Noise Reduction Module should be mounted no more than 3 feet from the intercom or base station.

System Requirements

The 3M Noise Reduction Module requires a system with a separate outside microphone and speaker. The A121 will not function with an intercom system configured to use a single speaker as both the microphone and speaker. The A121 will work in conjunction with most dynamic microphones and speaker/microphone assemblies.

System Configuration

The 3M Noise Reduction Module configuration is controlled by two jumper switch (JMP1 and JMP2) settings. JMP1 is used to set the appropriate gain for the MENU MICROPHONE.

JMP2 is used to match the A121 output level to the input of the intercom system.

Jumper

Position A

Position B

Position

 

 

JMP1

* Separate microphone

Do not use this position

 

& speaker at menu

 

 

sign/post

 

JMP2

* 3M Intercom

HME Intercom

 

Note: * Indicates factory default settings

Table 1. 3M Noise Reduction Module Jumper Settings

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Contents Description System ConfigurationAdditional Material Required System RequirementsFinal Checkout Procedure Mode ConfigurationStatus Indication Table Wiring Diagrams TroubleshootingProblem Possible Cause A121 Noise Reduction Module TroubleshootingPage Wiring for 3M D15/D30 Intercom Menu Post Wiring for Panasonic WX-C510/WX-C1010 Base Station HME HME MR100A

A121 specifications

The 3M A121 is a high-performance adhesive that stands out in the market for its unique formulation and reliable performance in a variety of applications. Designed for bonding a multitude of materials, the A121 is particularly favored in industries such as automotive, electronics, and construction. Its versatility makes it an essential tool for professionals who demand precision and strength from their adhesives.

One of the standout features of the 3M A121 is its exceptional adhesion properties. The adhesive is formulated to bond effectively to both porous and non-porous surfaces, providing a strong hold that can withstand demanding conditions. This versatility allows users to apply the A121 in a range of settings, from assembly lines in manufacturing to repairs in residential and commercial construction.

The adhesive is also notable for its quick curing time, which enhances productivity by reducing the time required for projects. It is designed to reach full strength within a matter of hours, enabling faster turnaround times in both factory settings and field applications. This feature is particularly advantageous in fast-paced environments where time is of the essence.

In terms of technological advancements, the 3M A121 incorporates innovative adhesion technologies that enhance its performance. Its unique silicone technology allows for excellent moisture resistance, making it suitable for applications exposed to humidity or water. This characteristic is vital for industries like electronics, where moisture can compromise the integrity of the bond and the performance of the components involved.

Additionally, the A121 is known for its superior temperature resistance. This quality ensures that the adhesive maintains its bonding capabilities even under extreme heat or cold conditions, expanding its usability across various environments. This resilience makes it a preferred choice for automotive applications, where components often experience significant temperature fluctuations.

The 3M A121 is user-friendly as well; it can be easily applied with standard dispensing systems, ensuring a smooth and even application. The adhesive does not require complex preparation, making it accessible for both professional applicators and DIY enthusiasts.

In conclusion, the 3M A121 adhesive stands out for its exceptional adhesion properties, quick curing time, and advanced technologies that provide moisture and temperature resistance. Its versatility and ease of use make it an indispensable product for various industries, ensuring strong and reliable bonds in all applications.
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