Carrier 50TCQA Installation Instructions Manual

Also see for 48TC*D: Service and maintenance instructions Installation instructions

Contents

25At any baud (9600, 19200, 38400 baud), the number ofcontrollers is limited to 239 devices maximum. Bus lengthmay not exceed 4000 ft, with no more than 60 totaldevices on any 1000--ft section. Optically isolated RS--485repeaters are required every 1000 ft.NOTE: Carrier device default is 9600 band.COMMUNICATION BUS WIRE SPECIFICATIONS —The CCN Communication Bus wiring is field--suppliedand field--installed. It consists of shielded 3--conductorcable with drain (ground) wire. The cable selected mustbe identical to the CCN Communication Bus wire used forthe entire network.See Table 6 for recommended cable.Table 6 – Recommended CablesMANUFACTURER CABLE PART NO.Alpha 2413 or 5463American A22503Belden 8772Columbia 02525NOTE: Conductors and drain wire must be at least 20AWG, stranded, and tinned copper. Individual conductorsmust be insulated with PVC, PVC/nylon, vinyl, Teflon, orpolyethylene. An aluminum/polyester 100% foil shieldand an outer jacket of PVC, PVC/nylon, chrome vinyl, orTeflon with a minimum operating temperature range of--20_C to 60_C is required. Do not run communicationwire in the same conduit as or next to any AC voltagewiring.The communication bus shields must be tied together ateach system element. If the communication bus is entirelywithin one building, the resulting continuous shield mustbe connected to ground at only one single point. If thecommunication bus cable exits from one building andenters another building, the shields must be connected tothe grounds at a lightning suppressor in each building (onepoint only).Connecting CCN bus:NOTE: When connecting the communication bus cable,a color code system for the entire network isrecommended to simplify installation and checkout. SeeTable 7 for the recommended color code.Table 7 – Color Code RecommendationsSIGNAL TYPE CCN BUS WIRECOLORCCN PLUG PINNUMBER+ Red 1Ground White 2--- Black 3Connect the CCN (+) lead (typically RED) to the unit’sTB1--12 terminal. Connect the CCN (ground) lead(typically WHT) to the unit’s TB1--14 terminal. Connectthe CCN (--) lead (typically BLK) to the unit’s TB1--16terminal. See Fig. 46.CCN BusJ2-1J2-2GND (WHT)1214TB1J2-3– (BLK) 16TB1TB1 PL+ (RED)C08276Fig. 46 -- PremierLink CCN Bus Connections50TCQA