Security Systems 808 - Manual (Page 7)

496336 Issue 1 7 of 22
I/P SND SIG SRQ +VE
0V
Prog
Test
1
2
Vol
Display
Rear of keypad pcb
Tamper
N/O Exit
Terminate
Button or
N/C Lock Set
Switch
End Station
Connections
0V
SIG
+V
SRQ
Extension Piezo
12VDC
E.E. Sounder
25mA Max.
+
-
To other
keypad(s)
FEZ
To detector
Figure 3. Wiring the 927 Keypad
Important: Please do not connect other devices (for example SAB, speakers and so
on) in the same cable as the remote keypad wiring.
Wiring Detector Zones
The 808 main connector has terminals for eight detector zones. Zones can
be wired as either two wire Fully Supervised Loop (FSL) or four wire Closed
Circuit (CC). However, all eight zones must be of the same circuit type. The
factory default is for CC zones. Use Menu 21 to change between FSL or CC.
Wiring FSL zones
Each FSL zone uses a two wire closed loop, with two resistors of different
values to differentiate between a ‘Circuit’ and ‘Tamper’ signals. A 2K2 (2.2
kohms) resistor is fitted in series at the end of the wired loop (EOL-End-Of-
Line) and a 4K7 (4.7 kohms) resistor fitted across the alarm contact. All
tamper devices are connected in ‘Series’ with the return feed to the end
station, see Figure 4.
808 Wiring Detector Zones