System Overview Annunciators
22 NFS-640 Installation Manual P/N 51332:B1 12/01/2003
Annunciator Expander Module - AEM-24AT. An expander board for the ACM-24AT that
provides an additional 24 points and is identical in size and appearance. Up to three expanders can
be used with an ACM-24AT.
Note: An AEM-24AT cannot be used to expand an ACM-48A.
Annunciator Control Module - ACM-48A. A one-channel Class- B unit with 48 annunciator
points for indicating current system status. Each annunciator point has a red LED for alarm, and a
green LED for normal; each module has a yellow unit-trouble LED at the top.
Annunciator Expander Module - AEM-48A. An expander board for the ACM-48A that
provides an additional 48 points and is identical in size and appearance. One expander can be used
with an ACM-48A.
Note: An AEM-48A cannot be used to expand an ACM-24AT.
2.8.2 Annunciators with 16- and 32-Point Capacity
Models with several other LED color combinations are available for use in areas with specific color
requirements. Refer to the Annunciator Control System manual for detailed information. For
Canadian requirements, see Appendix D “Canadian Applications”.
Annunciator Control Module - ACM-16AT. Provides features for audible and visual
indication of alarm and trouble conditions at each annunciator point. They include:16 red alarm
LEDs, 16 yellow trouble LEDs, 16 momentary touch-pad switches for controlling each point,
System trouble LED, Online/Power LED, Local sounder, Silence/Acknowledge switch, and
Remote functions.
Annunciator Expander Module - AEM-16AT. Expands the ACM-by 16 system points and is
identical in size and appearance. Three expander modules are supported by one control module
providing a maximum of 64 system points.
Note: An AEM-16AT cannot be used to expand an ACM-32A.
Annunciator Control Module - ACM-32A. Provides features for audible and visual indication
of alarm and trouble conditions at each annunciator point. They include: 32 red alarm LEDs,
System trouble LED, Online/Power LED, Local sounder, and Silence/Acknowledge switch.
Annunciator Expander Module - AEM-32A. Expands the ACM-32A by 32 system points
and is identical in size and appearance. One expander module is supported by the control module
providing a maximum of 64 system points.
Note: An AEM-32A cannot be used to expand an ACM-16AT.
2.8.3 Annunciator Fixed Modules
Introduction
Provide the control panel with discrete display and control points. Fixed modules turn their LEDs
on and off as directed by the control panel, and also report switch activations to the control panel
for action. You can only use one fixed module in a system. Each annunciator’s address is fixed at
address 1.
Refer to the Annunciator Fixed Module manual for further information.
Description
Annunciator Fixed Module - AFM-16AT. Contains 16 red alarm and 16 yellow trouble LEDs,
a system trouble LED, an Online/Power LED, and a local sounder, and switches for control panel
Acknowledge, Alarm Silence, and System Reset. Use the AFM-16AT for systems that require 16 or
fewer annunciation points.
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