93-530-70 Issue 0 Page 13 of 44 © Protec Fire Detection PLC 2007
9.0 Auxiliary Input and Output Wiring
The auxiliary input connections (Keyswitch, Remote Alarm and Class Change) and auxiliary output
connections (Global Fault and Global Fire) should be wired in screened cable. The screen should be
securely connected to the screwed earthing post provided in the panel.
9.1 Keyswitch Input
The keyswitch input is active when a short circuit (less than 50Ω) is connected across the keyswitch
terminals.
In the standard 3300 this is an alternate method of accessing level 2 functions if the code entry feature
is not required.
The keyswitch wiring should be kept local to the 3300.
9.2 Remote Alarm Input
The remote alarm input is active when a short circuit (less than 50Ω) is placed across the remote
alarm terminals. When activated the 3300 will activate alarm outputs, fast intermittently sound the
internal buzzer and illuminate the ‘General Fire’ indicator. The Global Fire output is NOT activated.
9.3 Class Change Input
The class change input is active when a short circuit (less than 50Ω) is connected across the Class
Change terminals. When activated the 3300 will activate alarm outputs continuously. The Global Fire
output is NOT activated.
9.4 Global Fault Output
The Global Fault output is a set of Volt free relay changeover contacts (rated at 1A 24V dc max.) to
allow interfacing to other equipment. The contacts are normally activated (the N/C and C contacts are
high resistance) and will release when the 3300 has any fault.
9.5 Global Fire Output
The Global Fire output is a set of Volt free relay changeover contacts (rated at 1A 24V dc max.) to
allow interfacing to other equipment. The contacts are normally released
(the N/C and C contacts are low resistance) and operate as follows.
The Global Fire output WILL activate if
• A standard zone has activated (manual or automatic)
• A delayed zone has expired
• A coincidence zone has expired, or a second coincidence zone has activated
The Global Fire output WILL NOT activate if
• A remote alarm activation occurs
• A zone in test mode is activated
• A non-latching zone is activated
• The Sound Alarms button is pressed in access level 2 or 3
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