Yes absolutely you need them or risk buying new panel and keypads. even if wiring is run totally with in a building like industrial sites and warehouses they are a good idea.
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| Isolator for 4 wire Keypad Buss Protection |
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| Isolator for 2 wire V-plex signal line |
Sadly I am one of handful of dealers who uses them I know this because when I order them at the Local ADI supply house
they never have them in stock and have to order them and more than once the salesman has remarked that I am among handful of Honeywell Dealers who uses them.
and if you are doing commercial fire they are legally required for fire systems and how many times never see one on entire system.
So what do these Isolators do ?
They prevent a short circuit on a wiring loop from several things
1- if there is a short on a 2 wire V- Plex or Multiplex wiring loop it prevent all the devices from being not able to function.
and just devices beyond the isolator are effected.
specifically important when you have sprinkler systems involved '
if a wire gets hit out in warehouse and shorts the isolator protected wiring going to sprinkler system switches will still operate.
2- It protects against over voltage in my customers case a large multi building motorcycle business the isolator took the hit when a surge induced by lightning came down line . only the items in one building got damaged and everything else was saved.
Its a case of use it or loose it and isolators have save myself and my customers plenty of grief over the years.But dealers always trying to get most profit out of a job they can never use them
and the end result is damaged equipment during storms which is preventable.
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