andyprutica Posted August 31, 2011 Posted August 31, 2011 hi i have installed about 7 scantronic 9752 with expanders in 7 diferent locations all of them came randomly with the fault kp01 missing exp01 missing the only way to reseted was to disconnect the battery and power we changed the panels with replacemnts send by scantronic but same fauls came up after a while we have installed many other scantronic panels but this 7 cose us such a greef scantronic technicles said that are site conditions and install spike suppresors witch we did but with no luck das anyone know what can be the problem? thank you andy
james.wilson Posted August 31, 2011 Posted August 31, 2011 how are they cabled? What is the distance on the data lines ie to expanders / keypads. Are they locally powered or from the panel? What was the day mode current if all powered from the panel? securitywarehouse Security Supplies from Security Warehouse Trade Members please contact us for your TSI vetted trade discount.
andyprutica Posted August 31, 2011 Author Posted August 31, 2011 thank you for the quick replay they are cabled star and the distance is unde 50m we have changed the cable with shilded alarm cable as the technicle recomanded but the same problem the power is from the panel but we used diferent power for pirs from aux the most pirs we have are 7 on one system regardes andy
james.wilson Posted August 31, 2011 Posted August 31, 2011 50m might be too much without local power. What is the power demand at the expander etc? securitywarehouse Security Supplies from Security Warehouse Trade Members please contact us for your TSI vetted trade discount.
andyprutica Posted August 31, 2011 Author Posted August 31, 2011 we did separate power for pirs from aux output and doubled the cores for data scantronic recon that 50m is ok as long the data is doubled the amp is not exceding 300mA
james.wilson Posted August 31, 2011 Posted August 31, 2011 ok 'doubled the cores for data' do you mean the power or the data here? securitywarehouse Security Supplies from Security Warehouse Trade Members please contact us for your TSI vetted trade discount.
andyprutica Posted August 31, 2011 Author Posted August 31, 2011 used 12 core shilded cable 8 core for data and 4 core power for pirs
james.wilson Posted August 31, 2011 Posted August 31, 2011 You shouldn't be doubling up the data. You will be causing all sorts of reflection issues with a doubled data line. securitywarehouse Security Supplies from Security Warehouse Trade Members please contact us for your TSI vetted trade discount.
andyprutica Posted September 1, 2011 Author Posted September 1, 2011 thanks i will do the data on the last install and well wait thanks again
james.wilson Posted September 1, 2011 Posted September 1, 2011 double the power mind use all cores for power, but only a single pair for data securitywarehouse Security Supplies from Security Warehouse Trade Members please contact us for your TSI vetted trade discount.
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