Avotronics Posted February 18, 2012 Share Posted February 18, 2012 I assume on eol wiring the rkp aren't wired with resistors? I was looking at the new keypad today and saw the tamper, but thought what about if the wires are yanked out or shorted etc. Have the keypads built in function to deal with this? Veritas Excel. Link to comment Share on other sites More sharing options...
itesecurity Posted February 18, 2012 Share Posted February 18, 2012 RKP tamper is done through the BUS / Communication wiring and has nothing to do with normal tamper circuit or EOL. Link to comment Share on other sites More sharing options...
Avotronics Posted February 18, 2012 Author Share Posted February 18, 2012 Thanks Link to comment Share on other sites More sharing options...
sixwheeledbeast Posted February 19, 2012 Share Posted February 19, 2012 Although worth noting some panels use resistors to "terminate" the data line. Galaxy's for example. Link to comment Share on other sites More sharing options...
Amps Posted February 19, 2012 Share Posted February 19, 2012 Although worth noting some panels use resistors to "terminate" the data line. Galaxy's for example. What does that resistor do? It seems to make no difference if fitted or not. Link to comment Share on other sites More sharing options...
norman Posted February 19, 2012 Share Posted February 19, 2012 data buffer Nothing is foolproof to a sufficiently talented fool. Link to comment Share on other sites More sharing options...
GalaxyGuy Posted February 19, 2012 Share Posted February 19, 2012 What does that resistor do? It seems to make no difference if fitted or not. Although it may seem that it doesn't make a difference, remember that the bus is quite resilient and can cope with a certain level of poor signal quality. In basic terms, the termination resistor is fitted to balance the data line and stop signals reflecting back on themselves. If you don't fit them, then there may be data corruption going on and it could lead to intermittent fault/tamper events. Link to comment Share on other sites More sharing options...
itesecurity Posted February 19, 2012 Share Posted February 19, 2012 Went to a job once, Euro mini with 2 RKP's, both which would go offline completely and not come on again unless a power down reset was done. Owner said they had been doing it on and off since the system was installed (nearly a year). Installed resistors each end of the bus wiring, problem solved. Link to comment Share on other sites More sharing options...
Amps Posted February 19, 2012 Share Posted February 19, 2012 say no more Link to comment Share on other sites More sharing options...
MrHappy Posted February 19, 2012 Share Posted February 19, 2012 Had atleast 1km of unscreened alarm cable for data running under roads ect between 6 buildings in a star. W/0 issues Mr Veritas God Link to comment Share on other sites More sharing options...
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