24 XLS140 Installation Manual Form Number 95-7673-3 P/N 51927:C  12/06/2005 
System Overview Peripheral Displays and Printers
2.8.1  Annunciators with 24- and 48-Point Capacity
For specific installation information, refer to the Annunciator Control Module manual. For 
Canadian requirements, see Appendix D “Canadian Applications”.
Annunciator Control Module - ACM-24AT  A one-channel Class-B unit with 24 switch 
controlled annunciator points. Each point is controlled by a silicone-rubber switch with indicator 
LED. Multi-color LEDs can be programmed to produce one of three colors: red, green or yellow.
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.
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.
2.8.2  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.
Annunciator Fixed Module - AFM-32A  Contains 32 red alarm LEDs, a system trouble LED, 
an ON LINE/POWER LED, and a local panel sounder with a silence/acknowledge switch. The 
AFM-32A is fixed at address 1, and will not accept expander modules.
2.9  Peripheral Displays and Printers
The control panel is compatible with the following printers and display devices:
•PRN Series Printer
• Keltron Remote Printer VS4095
• CRT-2 Display Terminal
All EIA-232 devices must be located in the same room in conduit within 20 feet (6.1 m) of the 
control panel.
NOTE:  An AEM-24AT cannot be used to expand an ACM-48A.
NOTE:  An AEM-48A cannot be used to expand an ACM-24AT.