Audio Isolator Modules
2
Addendum, Canadian Applications PN 52196ADD:A 9/20/2003
Audio Isolator Modules
Description of Modules
The audio isolator modules described below may be used to isolate short circuits during alarm
signaling. These modules are listed with ULC for use with the NFS-3030 and NFS-640.
AIM-1 - This module provides isolation to a separate circuit on an audio riser. A short circuit on an
AIM-1 NAC or speaker circuit will not disable other NACs or speaker circuits on the riser.
RSM-1 - This module works the same as the AIM-1, with the exception that there is a silence button for
in-suite operation. The silence button will silence the audible signal to the module’s circuit for
ten minutes during alarm. Resounding will occur automatically after ten minutes. To override
the ten minute silence, CBE programming must be done at the FACP so that when an AMG-1
is used for paging it interrupts the module’s 24VDC power for two seconds.
Main Power Supply Current Draw
The following table is an addition to the System Draw Current Calculations Table in this panel’s
installation manual. The figures should be used in calculating the current for the main power supply.
Panel Programming
SLC control modules used in conjunction with audio isolator modules must be programmed with one of
the two software Type Codes below.
To override the local ten-minute signal silence initiated by pressing the silence button on an isolator
module, the panel must be programmed to interrupt the module’s 24VDC power (RSM-1) for two
seconds when an AMG-1 is used for paging. This does not affect operation.
Applications
The following figures illustrate typical applications for audio isolator modules. Jumper settings are
specified in Figure 1 below to differentiate between NACs and speaker circuits. Jumpers are located on
the back side of each module.
Figure 1 Jumper Settings
Category
Calculation Column 1
Primary, Non-Fire Alarm
Current (amps)
Calculation Column 2
Primary, Fire Alarm
Current (amps)
Calculation Column 3
Secondary, Non-Fire Alarm
Current (amps)
Qty X [current draw]= Total Qty X [current draw]= Total Qty X [current draw]= Total
RSM-1, AIM-1 [ ] x [0.0145]= [ ] x [0.0145]= [ ] x [0.0145]=
Type Code
Silenceable
(Y/N)
Configuration Device Function
ISOLATED NAC Y NAC Supervised NAC for notification appliance, used with audio
isolators. Activates even if there is a short on its NAC circuit.
ISOLATED SPK Y NAC Supervised NAC for speaker circuits, used with audio
isolators. Activates even if there is a short on its audio circuit.
AIM-1
Remove jumpers 1 & 2
for speaker applications.
RSM-1
Remove jumpers 1 & 2
for speaker applications.
Jumper 3
AIM-1
RSM-1
Voice-AIM-1back.cdr
Voice-RSM-1back.cdr
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