8-Way Conventional Board 6
Man-1170EN Rev.01
Additional Boards Installation Manual
19
Detection Inputs
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Detection inputs provide current limited, resetting power suitable for most types of conventional detectors.
Monitoring is achieved by fitting a 6K8 end of line resistor at the last device on the detection line. Power is
removed from all detection lines for 5 seconds when the reset button at the main fire control panel is
pressed, thus resetting any activated detectors.
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Each detection input has a red and a yellow LED associated with it. The red LED illuminates when the
detection input is activated by a detector or call point and the yellow LED illuminates if the wiring to the
detection circuit becomes short circuited or if the end of line resistor becomes disconnected.
•
The inputs of the Conventional detection board are not suitable for the connection of intrinsically safe
barriers. If intrinsically safe barriers are required, these can be connected via loop modules manufactured
by the suppliers of loop devices.
•
A maximum load of 1.6 milliamps may be connected to each detection input which allows around 30
detectors of most types to be fitted. For an accurate calculation of the numbers of detectors that can be
fitted this calculation may be used :
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(1600/quiescent current of detector in microamps) -1 = number of detectors that can be connected.
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The characteristics of the detection zone inputs have been designed to carefully match those of Kentec
K3000 series conventional control panels and as such can be used as direct replacements for these or in
any situation where K3000 control panels would be suitable.
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The trigger resistance required to activate the zone is nominally 470 Ohms. The actual range of resistance
that will activate the zone is around 100 to 800 Ohms.
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Detection inputs may be re-configured via the configuration programme in the same way as all other input
devices. They cannot be made non-latching, but this should not be used when monitoring smoke or heat
detectors as the zone voltage is not removed when the panel is reset and therefore these conventional
detectors will not reset from the fire state.
