66 Installation TB9100/P25 CG/P25 TAG Installation and Operation Manual© Tait Limited March 2014Your base station should come supplied witha power supply cord to connect the maleIEC connector on the PMU to the local ACsupply. The pins of the IEC connector onthe PMU are identified at right.Connecting DC PowerThe way you connect DC power varies, depending on the type of basestation.Base Station withPMU The PMU is designed to accept a nominal 12VDC, 24VDC or 48VDCinput (depending on the model) with negative or positive ground. There isa minimum DC startup threshold to prevent damaging a battery which haslittle capacity left.You must connect the DC supply from the battery to the PMU via a fuse orDC-rated circuit breaker with a contact separation of 3mm, and with theappropriate rating, as shown in the table below. The DC input leads shouldbe of a suitable gauge to ensure less than 0.2V drop at maximum load overthe required length of lead.Terminate and insulate the DC input leads to protect them from accidentallyshorting to the subrack if the PMU is removed before the leads aredisconnected. Protective covers for the DC terminals are supplied with eachPMU.groundrear viewneutralphaseNominal SupplyVoltageInput VoltageRangeCircuit Breaker/Fuse Rating aa. The actual current consumption of the base station will be lower than these require-ments (refer to the Specifications Manual for more information).RecommendedWire Gauge bb. For a length of 5ft to 6.5ft (1.5m to 2m) (typical).12VDC 10VDC to 16.8VDC 60A 2AWG / 35mm 224VDC 20VDC to 33.6VDC 30A 5AWG / 16mm 248VDC 40VDC to 60VDC 15A 8AWG / 8mm 2
