FOCUS 200 PLUS Installation and Setup Guide5-2RS-485 Bus Cable TypesTwo types of bus cable are used. Each is a 4-conductor multi-gauge cable, differing only in the type ofinsulation.• 494465 (B6445) Cable - used as general-purpose.• 494467 (B6467) Cable - used specifically in air-handling plenums.Cable Run ConsiderationsThe safeguarding of RS-485 bus cable(s) from physical damage is vital to continuous uninterruptedoperation of the FOCUS 200 PLUS System. Keep the following guidelines in mind when running thecable:• Bus cable(s) should be routed to take advantage of the shortest possible length of cable, tominimize voltage drop.• Any required junction boxes (test terminals) can be placed to be accessible from the floor. Junctionboxes can also be used to sectionalize the bus to serve as an aid during troubleshooting.• Each of the buses is terminated internally in the control unit, so there are no bus-terminatingjumpers on the control unit circuit board. This means that neither of the buses by itself can be usedin a dual-run configuration (two runs from a common connector).PID GatewayThe PID gateway utilizes the quad trunk monitoring (two wires for power and two for signaling), andcontrol circuitry of the FOCUS 200 PLUS system. It employs the same Point Interface Devices (PID's),Commandable Output Point Interface Devices (COPID's), and other interface devices as used onprevious FOCUS Systems.Each PID provides a point of protection and serves to interface a sensor into the system. Each COPIDoccupies a point in the system, but the COPID is equipped with a pair of relays (form C, dry) thatoperate in response to a predetermined function being monitored. A point of protection used inconjunction with a PID is considered an input point, and one that is used with a COPID is consideredan output point.A PID gateway:• Connects to an RS-485 bus from the control unit and serves as a data gathering terminal for anycombination of up to 62 monitoring points.• Interrogates its PID's and their sensors, issues commands from the control unit to its COPID's, andreports the status of its connected devices to the FOCUS 200 PLUS control unit.• May be used for retrofit applications.• May be used for installations where the sensor or other device cannot be connected to the SIMGateway.• Functions in a manner similar to the control unit circuitry used for interfacing the quad trunk on aFOCUS 100 System.• Operates with most presently used FOCUS System accessories (PIDs, COPIDs, etc.). A COPID isnot interrogated by its PID gateway and is therefore not supervised.• Can be used for retrofitting previous FOCUS Systems (FOCUS 48, FOCUS 100B, C and D, FOCUS256, and FOCUS 300 Systems).Point Interface Devices (PIDs)The Point Interface Device:• Continuously monitors its loop for a cross, open, or tamper condition, stores this information, andreports it to the PID gateway when it is interrogated.• Controls the application of (+) 12 VDC power from the gateway trunk to its sensor (if the sensor isbeing powered by the system).• When commanded by the control unit, will open the power line to its protection loop, for thepurpose of resetting an alarm on a latching-type sensor, such as a smoke detector.
