Wiring a Signaling Line Circuit (SLC) InstallationAFP-200 PN 15511:H2 10/14/2002 432.9.4 SLC PerformanceSLC performance depends on the type of circuit: Style 4, Style 6, or Style 7. Table 11lists the trouble conditions that result when a fault exists on an SLC.Table 11 SLC Performance2.9.5 SLC Shield TerminationOverviewAll wiring leaving the control panel must be shielded. Figure 19, Figure 20, and Figure21 show three methods of wiring termination, depending on the type of conduit used: a)no-conduit, b) full-conduit, and c) partial-conduit.No-Conduit Shield TerminationDo not allow the shield drain wire to enter the system cabinet. Connect the drain wire tothe outside of the cabinet using a cable connector as shown in Figure 19:Figure 19 Shield Termination – No ConduitFull-Conduit Shield TerminationFor Style 6 or Style 7 field-wiring of the SLC, connect each end of the shield to thenegative side of the respective channel as shown in Figure 20:Figure 20 Shield Termination – Full ConduitFault in SLC Style 4 Style 6 Style 7Open Trouble Alarm/Trouble Alarm/TroubleGround Alarm/Trouble Alarm /Trouble Alarm/TroubleShort Trouble Trouble Alarm/TroubleShort and open Trouble Trouble TroubleShort and ground Trouble Trouble Alarm/TroubleOpen and ground Trouble Alarm /Trouble Alarm/TroubleCommunicationslossTrouble Trouble Trouble• Trouble indicates a trouble signal will be generated at the control panel during the abnormalcondition.• Alarm/Trouble indicates an alarm signal can be transmitted to the control panel during theabnormal condition.• SLC operation meeting Style 7 requirements isolates entire physical zones on the SLC fromfaults that occur within other areas of the SLC.Shield Drain WireScrape paint away from thecabinet to make goodelectrical connections.shield1.wmfSLC +SLC -CabinetShield Drain Wire: Theshield must not beconnected to earthground at any point.The shield drain wire must beconnected to the negative (–)side of the loop. Do not let theshield drain wire or the shieldfoil touch the system cabinet.Cabinetshield2.wmfSLC +SLC -Technical Manuals Online! - http://www.tech-man.com
