Johnson ACM-48A AEM-48A Fire Alarm Display Card

General Description

The Johnson ACM-48A is an Annunciator Control Module with 48 color-programmable active LEDs. It is designed to provide visual feedback for alarm conditions, system faults, and operational status. The AEM-48A is an expander module, allowing the ACM-48A to support 96 points. Together, these modules ensure comprehensive monitoring capabilities in fire safety applications.

Technical Specifications

l Power Supply: 24V DC nominal (17V DC to 28V DC)

l Current Draw:

l On-line flashing (all other LEDs off): 0.016 A

l Alarm condition (all LEDs on): 0.070 A

l Dimensions:

l ACM-48A: 8.375 in. (213 mm) high x 4.375 in. (111 mm) wide

l AEM-48A: Same dimensions as ACM-48A

l Temperature Range: Operational at 0°C to 49°C (32°F to 120°F)

l Humidity: Up to 93% relative humidity ±2% at 32°C ±2°C

Detailed Features of Johnson ACM-48A AEM-48A

1. Colour Programmable LEDs: Each of the 48 active LEDs can be programmed to display red, green, or yellow colours, providing clear visual indications of various alarm statuses.

2. System Fault and Power Indicators: The device includes dedicated LEDs for system faults and power status, ensuring users are immediately aware of any issues.

3. Local Piezo Sounder: An integrated sounder emits audible signals to alert users to alarm conditions, enhancing situational awareness.

4. Silence/Acknowledge Switch: This switch allows users to silence alarms or acknowledge conditions directly from the module, streamlining response efforts.

5. Expandable Design: The AEM-48A can be connected to the ACM-48A to increase the total number of monitored points without additional complexity.

Applications of Johnson ACM-48A AEM-48A

The Johnson ACM-48A AEM-48A modules are versatile and suitable for various applications:

l Commercial Buildings: Ideal for office complexes and retail spaces where fire safety is paramount.

l Industrial Facilities: Provides robust monitoring for manufacturing plants and warehouses with complex safety requirements.

l Educational Institutions: Enhances safety protocols in schools and universities by providing clear alarm notifications.

l Healthcare Facilities: Essential for hospitals and clinics where timely alerts can save lives.

Installation

Installing the Johnson ACM-48A AEM-48A modules involves several steps:

l Preparation:

Ensure that the installation area is dry and free from obstructions.

Gather necessary tools such as screwdrivers and wire strippers.

l Mounting the Modules:

Use appropriate mounting hardware to secure the ACM-48A in a designated enclosure or wall-mounted backbox.

Ensure that there is adequate space for ventilation around the unit.

l Wiring Connections:

Connect the power supply leads to the designated terminals on the ACM-48A.

For expansion, connect the AEM-48A using a ribbon cable plugged into the appropriate connector on the ACM-48A.

l Testing Functionality:

After wiring, power the system and verify that all LEDs function correctly by simulating alarm conditions.

Test the piezo sounder and ensure that it activates during alarms.

l Final Configuration:

Set any DIP switches or configuration settings as per system requirements.

Label each LED according to its designated function for ease of use.

Related Part Numbers

For further expansion or similar products within this series, consider the following:

l Johnson ACM-24AT (24-point control module)

l Johnson AEM-24AT (24-point expander module)

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