Before You Begin Installing
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3-3
3.3
SK-4224 Board Layout
Figure 3-1 shows the SK-4224 circuit board including location of terminals, connectors, DIP
switches, and LEDs.
Figure 3-1 Model SK-4224 Layout
Zone Initiating
Circuits
4 Class B or
2 Notification
Appliance
Circuits
Notification
Expansion
Inputs
Trouble &
Alarm Relays
Auxiliary
Power
Output
Backup
Battery
Connector
AC Power
Connector
Annunciator
Programming
DIP Switches
On-Board
Piezo Sounder
SK-2884
Serial
Interface
Connector
2 Class A
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