Specifications

Equipment list B
SHM80001
SAFETY HI-TECH
Quaestor-SZU Releasing Fire Control Panel - Installation and Operation Manual
Revision E03.04
87 of 155
Amseco Compatible NAC Devices
The Quaestor-SZU Releasing Fire Control Panel accepts compatible Amseco NAC devices for use on the special
application outputs of NAC 1 and NAC 2. The number of compatible devices that NAC 1 and NAC 2 can each safely
operate is limited by a 500 mA current threshold. Installers must limit the population of compatible devices in each
NAC circuit by this 500 mA threshold.
As with any circuit, a circuit design is limited by the power source and device-loads connected to it. A combination of
device-loads can be safely installed in a circuit when the circuit is operated within the constraints of the power source
threshold. There are no exclusions for the amount of device-loads that can be safely installed in the circuit as long as
the maximum current load is below the output current available from the power source.
The Quaestor-SZU Releasing Fire Control Panel can also safely operate combinations of device-loads on NAC 1 and
NAC 2. These device-loads can include combinations such as strobes, horns, strobe/chimes, strobe/horns and speaker
strobes. The sum of this device-load combination is limited by the 500 mA available from each NAC output. Safety
High-Tech recommends designing and installing combinations of NAC circuits based on this “device-load” versus
“current-available” understanding.
Reference manufacturer data sheets for individual device loads and then total the loads to determine if the sum
exceeds the 500 mA threshold of each NAC output.
UL Listing Requirement
All control panel designs restrict the number of NAC devices installed in circuits based on the rated current threshold.
Some control panel designs further restrict the number of NAC devices installed in circuits based on device
synchronization in addition to the rated current threshold. These control panel designs can reduce the population of
NAC devices below the number of devices that would be considered for the rated current threshold.
NAC outputs of the Quaestor-SZU Releasing Fire Control Panel are not limited by conditions other than the
maximum rated current threshold. NAC outputs of the Quaestor-SZU Releasing Fire Control Panel can operate
combinations of Safety High-Tech authorized NAC devices as long as the circuit load does not exceed 500 mA.
The following statement is necessary for UL qualification and excludes device-loading combinations that are
common in most FACP installations:
The following series of Amseco NAC devices are compatible for use on the special application outputs of NAC 1 and
NAC 2 when connecting Amseco synchronization modules and operating each NAC output below 500 mA:
Name of Series Environment Model Series Description Mount
Select-A-Strobe/Chime Indoor CM24C Chime Ceiling
Select-A-Strobe/Chime Indoor SCM24C Chime Strobe Ceiling
Select-A-Horn Indoor/Outdoor H-1224 Horn Wall
NAC 1 and NAC 2 of the Quaestor-SZU Releasing Fire Control Panel can each operate a maximum
of seven Amseco SL-1224 strobes when configured for 15cd outputs and synchronized with an
Amseco SMD10-3A synchronization module.