16/32
MP120
2.3.4 OUTPUT HARDWARE CONFIGURATION
Control unit outputs U2, U3, U4 and U5 are of the configurable O
pen Collector
type, choosing from between PNP
(preset) or NPN. Each output must be configured individually, by moving the respective jumper placed on the
control unit master card (see the figure of paragraph
2.2 FITTING OPTIONAL ITEMS AND ACCESSORIES
for
their positions).
The max. current that can be delivered is 100 mA (for output U2) and 10 mA (for each of outputs U3, U4 and U5).
Open Collector
outputs
To put it in simple words, the
Open Collector
electric outputs can be considered as electronic circuit breakers”.
In case of PNP output, at rest, the electric output is +12 V, which will be missing in case of alarm.
In case of NPN output, at rest, the electric output is 0 V, which will turn into +12 V in case of alarm.
The Open Collector outputs can be used to control relays or signalling LEDs. The Elkron MR02 module features 2
free-exchange relays (1 A - 24 V) which can be controlled by the OC electric outputs.
OUTPUT CONFIGURATION
positive
command
negative
command
