Section 5 - Gateways5-17Installing SIM and SIM SensorsInstall each sensor in the manner recommended in the manufacturer’s instructions.System-powered sensors cannot be adjusted or tested until the system power has been turned on, the pointdata has been loaded into the control unit, and communication has been established between the controlunit and the gateway.All SIM sensors are connected to the SIM gateway trunk cable via a 2-conductor branch cable. Twotypes of branch cable are available for sensor connections. Each is a 2-conductor, 18-AWG cable,differing only in type of insulation. The cables are:• 493494 - Approved for FA, SUPV, HUA, and BA.• 493493 - Approved for FA, SUPV, HUA, and BA where wire is being installed in air-handlingplenums (Teflon or equiv.).Sensor Power ClassificationThe various types of sensors employed with the FOCUS 200 PLUS System can be divided into thefollowing basic categories according to the source of power required:Sensor Type Power Source Wiring ConfigurationSIM Sensors Receives operating power andcommunications from thegateway trunk cable's blue andyellow wires.Uses the blue and yellow wires. The blackand red conductors are not used.System-poweredsensorReceives operating power fromthe gateway trunk cable's red andblack wires. The sensor must becapable of operating between 8and 15 volts, with a maximumcurrent of 85mA.Two types of system-powered sensors:• Integrated, such as Horn/Strobe, whichuses the 4 conductors of the trunk cable.• Non-integrated, which uses the outputwires of the SIM: black/white (-) andred/white (+). They also use 3 wires, forconnection of a 33k resistor: orange,blue/white, and white.Independentlypowered sensorUses operating power from anexternal source.Wired the same way as a SIM sensor exceptthe 12-volt terminals are wired to theexternal power source.Wiring a SIM or SIM SensorAn SIM Sensor is installed on branch cables from the Gateway trunk. These branch cables are limitedto 100 ft long. If the branch cable drops below 6 feet or is subject to damage that may result in shortingof conductors, a 248302 Fuse must be installed. This protects the Gateway trunk from being disabled inthe event of a short on the wires. Only the SIM with the blown fuse will be in Comm Fail, not the entireGateway trunk.Install an SIM or SIM sensor by taking the following steps and referring to Figures 5-7 through 5-13.Step Action1 Run the branch cable no more than 100 feet long from the Gateway trunk. Use cableSCN 493494 or 493493 for two-wire SIM connections. Use SCN 494465 or 494467 forfour-wire SIM connections.2 Cut the sheathing of the Gateway trunk to expose the four wires of the trunk.3 Use Scotohlok SCN 809190 connectors (#558) to connect the branch cable to the Gatewaytrunk, matching the colors of the wires on the trunk with the branch cable.4 If the branch cable is subject to damage, splice in an SCN 248302 in-line fuse with holderand place it close to the Gateway trunk.
