C921AA Base Station

MIC

MIC

SHIELD

MENU SPKR

MENU SPKR

MON SPKR

COM AUDIO IN AUDIO OUT ALT ALERT VEH DET ALERT OUT COM 12V UNREG

A300 Audio Greeter

Optional Service Timer

TIMER TRIG

12

 

 

 

 

 

 

 

 

 

COM

11

 

 

 

 

 

 

 

 

 

MSG4 TRIG

10

 

 

 

 

 

 

 

 

 

VEH DET-

9

COM

 

 

 

 

 

 

 

 

VEH DET+

8

VEH DET

 

 

 

 

 

 

 

 

 

7

 

 

 

 

COM

6

 

 

 

 

 

 

 

 

 

MUSIC

5

 

 

 

 

 

 

 

 

 

MUSIC

4

 

 

 

 

 

 

 

 

 

COM

3

 

 

 

 

_____

2

 

 

 

 

TALK

 

 

 

 

 

 

 

 

 

AUDIO OUT

1

AUDIO IN

 

 

 

 

 

 

 

 

J9

 

 

 

 

 

INTERCOM SPKR

10

MENU SPKR

 

 

 

 

 

 

 

 

INTERCOM SPKR

9

MENU SPKR

 

 

 

COM

8

A121 Noise Reduction Module

 

7

INTERCOM MIC

MIC

 

 

 

INTERCOM MIC

6

MIC

 

 

 

MENU SPKR

5

MENU SPKR

MENU

INTERCOM

1

 

4

1

MIC IN

MIC OUT

MENU SPKR

MENU SPKR

 

 

 

 

2

MIC IN

MIC OUT

2

 

3

COM

 

 

 

 

 

3

SHLD

SHLD

3

 

2

MENU MIC

MIC OUT

MENU

MENU

 

 

4

4

 

 

SPKR

SPKR

MENU MIC

1

MIC OUT

 

MENU

MENU

 

 

5

5

J10

 

SPKR

SPKR

 

 

 

Menu Post

MENU

SPKR

MENU

MIC

VEHICLE

DETECTOR

Figure 5. Wiring for 3M C760/960/1060 Base Station with A300 Audio Greeter

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3M A121 installation instructions Menu Post

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.