Specifications

Overview 2
SHM80001
SAFETY HI-TECH
Quaestor-SZU Releasing Fire Control Panel - Installation and Operation Manual
Revision E03.04
9 of 155
Internal Power Supply
The internal power supply of the Quaestor-SZU Releasing Fire Control Panel meets UL 864, 9th edition and provides
a 2 Amp, linear power-source for operating FACP functions as well as charging the standby batteries. The 2 Amp
power supply operates 115 VAC and 230 VAC models of the Quaestor-SZU Releasing Fire Control Panel.
Reference Appendix C, Calculations to determine load current limitations of the 2 Amp power supply
Features of the internal power supply include:
Power Outputs
The Quaestor-SZU Releasing Fire Control Panel provides power outputs the terminals of NAC 1, NAC 2, and NAC
3, AUX 24V, STATUS UNITS and EXTING. terminals.
Reference Section 3, Installation and Appendix A, Specifications for further information concerning NAC, Releasing,
Status Unit and AUX 24V outputs of the Quaestor-SZU Releasing Fire Control Panel.
Releasing Circuit
The Quaestor-SZU Releasing Fire Control Panel provides features for operating releasing signal delay, device
supervision, releasing emergency abort, flood control and manual release.The Quaestor-SZU Releasing Fire
Control Panel operates releasing devices in compliance with Fire Protection Service Valves under UL 260, UL 429
and UL 429A.
NAC Outputs
NAC outputs of the Quaestor-SZU Releasing Fire Control Panel are programmable and can be operated
in regulated or special application mode.
Reference Appendix A, Specifications for constraints and operating levels of these NAC output modes.
Battery-backup
Provides battery power to the load when the AC input of the power supply falls
below the rated level. The voltage at the load remains within the specified range
during these switching-transitions.
Battery-boost
Boosts voltage when the battery voltage drops due to a low-battery condition.
Short-circuit protection
Provides a shut down on the load side of the power supply when the load-current
exceeds the maximum level.
Automatic-retry
Restores output to the load when operating conditions return to nominal levels.
This feature restores voltage levels at the load following conditions such as
over-current and battery depletion.
Status
The AC input to the power supply is supervised by the Quaestor-SZU
Releasing Fire Control Panel with Releasing. The control panel provides an
LED status display for normal and trouble conditions. Normal conditions occur
when the power supply is operating in an acceptable range. Trouble conditions
occur when the power supply is not operating in an acceptable range.