Cooper Security 9651 Installation Manual download pdf (Page 24)

3. Installation 9651

Page 20 11772232

Connecting Detector Circuits to the Main PCB

The connectors for the detector circuits, or zones, are on the left-hand edge of

the main PCB in the control unit. The table below summarises the number

and type of zones that can connect to the main PCB of the control unit. Use

Command 21 to specify which of these wiring types you are using. You

cannot specify different wiring types for different zones.

Control Unit Wiring Type

Zones

8 four-wire CCL (closed circuit loop) with common tamper

8 two-wire FSL (fully supervised loop)

CCL Connections

Figure 14 shows how to connect four-wire CCL zones. Note that there is a

single Global tamper loop that serves all zones.

Zone 1

Zone 2

Global Anti-tamper

Zone 3

Zone 4

Zone 5

Zone 6

Zone 7

Zone 8

Tamper loop

Zone 1

Zone 2

Alarm contacts

Figure 14. CCL Connections (common tamper)

FSL Connections

Each FSL zone is a "Fully Supervised Loop" using a two-wire closed loop. As

shown in Figure 15, the loop uses resistors of different values to differentiate

between "Circuit" and "Tamper" signals: a 2K2 resistor fitted in series at the

end of the wired loop (EOL) and a 4K7 resistor fitted across the alarm contact.

With the loop in a normal state and the alarm contacts closed (shorting out the

4K7 resistor), the total resistance of the loop is 2K2. When the alarm contacts

open (removing the short from the 4K7 resistor), the resistance of the loop

increases to 6K9 and so the control unit detects an alarm condition. If a

tamper device opens, the loop resistance becomes infinite (open circuit) and

so the control unit detects a tamper signal.

To connect a detector to an FSL loop, you must wire suitable high-tolerance

resistors to the detector. Always check resistor colour coding and tolerance

before wiring resistors into circuit (see Figure 16).

1 2 ... 19 20 21 22 23 24 25 26 27 28 29 ... 87 88

Comments to this Manuals

No comments

Cooper Security 9651 Installation Manual Page 24

Comments to this Manuals

Related products and manuals for Security access control systems Cooper Security 9651