Kentec Electronics Sigma CP K Series Operation And Maintenance Manual

Contents

Man-1078_Sigma_CP_22Page 21 of 2421. Power supplyThe control panel requires a 230V (+10%/-15%), 50/60Hz, AC mains power supply which connects to thefused terminal block labelled “230V”.The fused terminal block contains a 20mm, F1.6A L250V fuse which should only be replaced with a similartype.The output voltage of the power supply is 28V DC +/- 2V and the total current rating including a maximum0.7A for battery charging is 3 Amps. Fuse F12 mounted on the circuit board is a self-resetting electronic fuserated at 4 Amps.The incoming mains cable should be routed well away from other lower voltage wiring by a distance of atleast 50mm.Mains wiring should include an earth conductor which is securely bonded to the building earth and shouldenter the enclosure as close as possible to the mains terminal block. Mains wires should be kept very shortinside the enclosure and secured together close to the mains terminal block with a cable tie.The control panel can accept sealed lead acid rechargeable batteries of up to 7Ah maximum capacity (seetable 2 for battery size required for each model).The maximum current drawn from the batteries when the main power source is disconnected is 3 Amps.Battery leads are supplied wired to the PCB along with a link to connect the two batteries in series. The PCBis fitted with a 20mm, 3.15A T1 glass fuse (F13) in the battery charging circuit which must only be replacedwith one of the same type.It is most important that the polarity of the batteries is carefully observed when connecting.When the batteries are discharged to a level at which a low battery indication is given, the BATT FAILindicator will also be lit.Wrongly connected batteries could cause damage to the control panel.Caution: RISK OF EXPLOSION IF BATTERY IS REPLACED BY AN INCORRECT TYPE.DISPOSE OF USED BATTERIES ACCORDING TO THE INSTRUCTIONS.Figure 9 – Mains and battery connections1BN NL LE+ - + -GREY LINKBLACK BATTERYLEAD TO -TERMINALRED BATTERYLEAD TO +TERMINALMAINSTERMINAL KEEP MAINS WIRES AS SHORT AS POSSIBLEAND SECURE ALL THREE WIRES CLOSE TOTHE TERMINAL BLOCK WITH A CABLE TIE

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