DSC PC5020 - Standby Battery Calculation Chart - English - PowerSeries

Standby Battery Calculation Charts Fire Applications PC5020 control panel provides regulated current for the panel auxiliary PGM outputs and Keybus connected mod The bell circuit on the main panel is not used for fire alarm notification appliances which means that alarm current not a part of the main panel battery calculation components that draw power from the main panel must be considered in the standby battery calculation This any 2 wire smoke detectors connected to the PGM2 Consult the smoke detector manufacturer installation for current draw calculate the minimum size of standby battery required for your system Calculate the Keybus load using chart 2 Transfer the total to chart 1 Complete the rest of chart 1 Total the current draw in chart 1 and write the total in box 1 of the calculation below the chart Total current draw must not exceed 480mA Complete the calculation steps below chart 1 The answer in box 5 is the minimum standby battery size If the standby battery size calculated exceeds 14Ah 2 7Ah batteries fit in the cabinet then either reduce the current loading on the main panel or install the PS5350 external battery charger which can take batteries up to 60Ah in size When entering values in the charts below please use the maximum specified ratings of the devices ex each 2 smoke detector maximum current rating 1 Panel overall calculation or components drawing current from the panel panel 65mA 150mA or T Link 150mA required 1 output 50mA max 2 output 300mA max 3 output 50mA max PC5020 CF only 4 output 50mA max PC5020 CF only output on the main panel 420mA max load 420mA max 1 LCD5500Z keypad required Current 700mA Note 2 3 Note 2 3 Note 2 3 Note 2 3 Note 2 Chart 2 1 For 60 hour time at a current of the battery size be 35Ah or greater 24 hour standby at a maximum of 480mA the size must be 14Ah greater Under no can the current in line 1 480mA current from the main control panel See Note 1 1 time 24 or 60 hours 2 Alarm Current 3 Alarm Time 5 minutes or 0.0833 hours 700mA x 0.0833 hours total standby current in mA 1 and alarm current 3 the standby time in hours 2 Write total in box 4 1 x 2 4 factor conversion to Amp Hours 5 4 by the derating factor 5 4 x 5 6 This value of 58.3mAh is be implemented in the calculation only if Output is used For Application only is the minimum size battery required to maintain the main panel for the standby time selected 2 Aux is shared between Aux Keybus Blk Yel Grn all PGM outputs Minimum required LCD5500Z keypad 85mA 150mA available current for Aux and PGM outputs should total 180mA v3 X 2 Keybus Loading series AML devices for chart 2 current on the Keybus to Chart 1 to Addressable Loop Current Calculation Chart from PC5100 Installation Instructions for total PC5100 Addressable Devices 3 PGM1 PGM2 PGM3 and PGM4 can be used as standard PGM out Each PGM output can sink up to 50mA maximum PGM2 can sink up 300mA Digital Security Controls Ltd Canada www dsc com Support 1 800 387 3630 in Canada 29005057 R002 all comments concerning this to pubs dscltd com