LED and Keypad-Switch Functions
PN 15842:K 7/23/2002 43
Section 5 LED and Keypad-Switch
Functions
5.1 ACM-24AT, ACM-48A, and Expanders
Figure 5-1 LED and Keypad-Switch Locations
5.1.1 Acknowledge/Lamp Test Switch
This switch’s functions vary between ACM-24AT and AEM-24AT:
• If this switch on the ACM-24AT is pressed and held for 2 seconds, it
performs a lamp test for the annunciator and each connected expander. LEDs
light steady and piezo sounds for as long as the switch is held down.
• If this switch on the AEM-24AT is pressed and held for 2 seconds, it
performs a lamp test for the expander.
• If this switch on the ACM-24AT is pressed quickly and released, it
acknowledges all status changes for both the ACM-24AT and the expanders.
Flashing LEDs will glow steady and the piezo will be silenced.
Note: In systems set for manual override mode, it also functions as the
manual override key to toggle between automatic operation or manual
override operation for all points.
• Pressing and quickly releasing this switch does not have a function on an
expander.
5.1.2 On-line LED
Lights steady green during communication with the control panel.
CM-24AT, AEM-24AT
Annunciator Points
System
Trouble
LED
Annunciator Points
Point-Active LED
Trouble LED
Acknowledge/
Lamp Test Switch
On-line LED
Annunciator Points
Slide-in Labels
Slide-in Labels
Point-Active LED
ACM-48A, AEM- 48A
nnunciator Points
acm24-48-diagram.cdr
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