(((ELKRON))) - MP110
Example of connection of a
detector on zones programmed
as balanced
With the exception of the reader and keypad zones, the alarm zones all refer to the positive and may be programmed
as single or dual balancing NC. Dual balancing makes it possible to connect and distinguish on the same zone the alarm
and tamper contacts of the sensor connected to that zone. Single balancing, dual balancing or NC selection may be
programmed on each single board (mother board and expansion boards) by dip-switches.
When a NC type configuration is selected for these zones, we recommend that they be closed with positive through
the supplied resistance in order to prevent excessive current consumption while the zone is at rest. An average
consumption of 21 mA (for 8 zones) is obtained by closing the zone directly as positive, whereas consumption is
reduced to about 3.5 mA when the zone is closed with resistor.
Example of connection of a
detector on positive NC
programmed zones
2.4.4 Physical connection of zones
Example of connection of a
detector on zones programmed
as DOUBLE BALANCING
The programming of double
balancing inputs allows to discrimi-
nate the 2 events of "zone alarm"
and " zone tamper" with the same
return wire on the station input.
CAUTION
T/A inputs (control unit and ex-
pansions) must be always bal-
anced regardless of the type of
connection selected for burglary
inputs.
-
+
TC
AL AL TC TA TA
Zn
2
2
K
2
2
K
CONTROL UNIT
DETECTOR
ALL
-
+
TC
AL AL TC TA TA
Zn
2
2
K
2
2
K
CONTROL UNIT
DETECTOR
ALL
-
+
TC
AL AL TC TA TA
Zn
2
2
K
CONTROL UNIT
DETECTOR
ALL
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