Security Centres 808 manual Wiring Detector Zones, Wiring FSL zones

808			Wiring Detector Zones
		Vol
Display
		Test
Rear of keypad pcb			1
			2
		Tamper	Prog
		I/P SND SIG SRQ +VE 0V	FEZ
N/O Exit
Terminate
Button or
N/C Lock Set
Switch
Extension Piezo		-
12VDC
E.E. Sounder
25mA Max.		+
	SIG		To detector
End Station	SRQ
Connections
	+V
	0V

To other keypad(s)

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.

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