Specifications

Installation 3
SHM80001
SAFETY HI-TECH
Quaestor-SZU Releasing Fire Control Panel - Installation and Operation Manual
Revision E03.04
33 of 155
Relay Outputs
Volt free changeover relay contacts are provided for local control and signalling. These contacts are rated for switching
signalling circuits and must be operated within specified ratings.
Reference Appendix A, Specifications for relay ratings of Quaestor-SZU Releasing Fire Control Panel.
Typically, the Aux 24V output of the fire control panel is switched through these relays and used to control other
systems.
Aux 24V
The AUX 24V connection is a common special application output. The output is supervised for short-circuits and
ground faults. The output is not supervised for open circuit conditions. Terminals of the Aux 24V supply are labelled
( + ) and ROV. The ROV terminal is the negative terminal.
Operating Limits
The AUX 24V supply is protected by an electronic, self resetting fuse rated at 1.1 A. Devices connected to this
output must not draw current in excess of 500 mA. Operate expansion-boards, Status Units and Ancillary Boards on
this special application output.
Fire Control Panel - Status Unit Terminals
This section describes the Status Unit terminals of the Quaestor-SZU Releasing Fire Control Panel. Status Unit terminals of
the Quaestor-SZU Releasing Fire Control Panel contain connections for Data and Power. The Data terminals provide RS485
communication. The Power output of these terminals is designed to operate the Status Unit and the
Ancillary Board only.
The Power output of the Status Units terminals is special application and supervised.
A common earth ground is required between all Status Units and each fire control panel.
The figure below illustrates the STATUS UNIT terminals of the Quaestor-SZU Releasing Fire Control Panel:
Figure 1-12
STATUS UNIT Terminals
STATUS UNITS
DATA POWER
+ - + -