Cooper TP Workshop Manual_Scant:Layout 1 7/8 ... - Cooper Security

9x5xControl UnitWiring TypeZones8 four-wire CCL with individual tampers16 two-wire FSL (with up to 24 extra zones on expanders)8 two-wire FSL (with up to 32 extra zones on expanders)8 two-wire EOL (some terminals not used)CCL ConnectionsFigure 17 shows how to connect four-wire CCL zones.Alarm contactsZone 1Zone 212Tamper contactsZone 1Zone 234Figure 17. CCL Connections (individual tamper)FSL ConnectionsWhen using expanders, you must use Command 21 to specify how manyFSL zones to connect to the control unit. You can have 8 zones on thecontrol unit and 32 on expanders, or 16 zones on the control unit and 24 onexpanders.Each FSL zone is a "Fully Supervised Loop" using a two-wire closed loop. Asshown in Figure 18, the loop uses resistors of different values to differentiatebetween "Circuit" and "Tamper" signals: a 2K2 resistor fitted in series at theend of the wired loop (EOL) and a 4K7 resistor fitted across the alarmcontact.With the loop in a normal state and the alarm contacts closed (shorting outthe 4K7 resistor), the total resistance of the loop is 2K2. When the alarmcontacts open (removing the short from the 4K7 resistor), the resistance ofthe 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-toleranceresistors to the detector. Always check resistor colour coding and tolerancebefore wiring resistors into circuit.22 of 76 Issue 1