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Configuring Annunciators for the NCA
H.5 Configuring Annunciators for the NCA
The switch numbers given below are for SW28 on the ACM-24AT and ACM-48A, and for the 8-pin DIP switch on the ACM-16AT and
ACM-32A. Address and DIP switches must be set before the annunciator will operate properly. See Section 5.2 for switch locations.
Switch #
1
Manual override: Set "ON" when the annunciator is used for manual override of control relays.
2, 3
Expanders installed: Set these switches according to how many expanders are installed at the address. See Section 5.12.3 for ACM-
24AT/ACM-48A; see Section 5.13.3 for ACM-16AT/ACM-32A.
4
Not used; set to OFF
5
Receive Only: Set this switch "ON" for each annunciator that will provide the same information as another annunciator in a different location.
(When two or more annunciators hold the same address, all but one must be configured as "Receive Only" annunciators.)
6
Piezo Disable: Set this switch "ON" to disable the piezo from sounding for any event. (The piezo will also be disabled if Flash Inhibit is "ON".)
7
Switch Inhibit: Set this switch "ON" to disable the point control switches on the annunciator and prevent them from executing system control
functions. When inhibited, the switches will serve as local Lamp Test switches only. In addition, the Acknowledge/Lamp Test switch will
function only in a local capacity unrecognized by the system.
NOTE: Only the first four switches control the NCA Their functions are: 1=Acknowledge 2=Signal Silence, 3=System Reset, 4=Drill.
8
Flash Inhibit: Set this switch "ON" to disable the flashing of LEDs associated with unacknowledged events. Flash Inhibit also disables the
piezo from sounding.
1
See Sections 5.12.1 and 5.12.4 for details about SW32 on ACM-24AT and ACM-48A.
ACS Manual — P/N 15842:N3 5/4/2022
1
ACM-24AT and ACM-48A
ACM-16AT and ACM-32A Function
Eight-Point Shift: Set to "OFF".
NCA Systems (UL 8th)
51
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