16
Single balancing
Detects the opening of a normally closed contact disposed in series with a balanced line (on 1.8K) connected between an input terminal and the
respective negative (-V). Detects a sabotage state due to a line short-circuit. In the event of cutting, it can generate an error or alarm.
Double balancing
Detects the opening of a normally closed contact disposed in series with a balanced line (on 1.8K) connected between an input terminal and
the respective negative (-V). Adding a second balancing resistor (also 1.8K) makes it possible to distinguish an alarm state from a line sabotage
state, both in the event of cutting and short-circuit.
Triple balancing
Detects and distinguishes the opening of two normally closed contacts, usually alarm and electrical fault, disposed in series with a balanced line
(on 1.8K) connected between an input terminal and the respective negative (-V). Its ability to distinguish derives from the adoption of a second
balancing resistor (1.8K) disposed in parallel to the
fi
rst of the contacts to be monitored and a third balancing resistor (3.3K). This con
fi
guration
makes it possible to distinguish between an alarm/electrical fault state and a line sabotage state, both in the event of cutting and short-circuit.
Double zone
Detects and distinguishes the opening of two normally closed contacts, usually relating to two different sensors, disposed in series with a line
with comparable behaviour to that of an NC line, connected between an input terminal and the respective negative (-V). Its ability to distinguish
between the two sensors derives from the adoption of a balancing resistor (1.8K) disposed in parallel to the contact of the
fi
rst sensor to be
monitored and a second balancing resistor (3.3K) disposed in parallel with the contact of the second sensor to be monitored. It is not capable
of detecting a line sabotage state: in the event of cutting it can generate an error or sabotage; in the event of a line short-circuit it does nothing.
The sabotage can only be generically attributed to the wired line for the input to which it is connected.
Double zone with end of line (EOL double)
Detects and distinguishes the opening of two normally closed contacts, usually relating to two different sensors, disposed in series with a line
with a balanced line (1K8) connected between an input terminal and the respective negative (-V). Its ability to distinguish between the two
sensors derives from the adoption of a balancing resistor (1.8K) disposed in parallel to the contact of the
fi
rst sensor to be monitored and a
second balancing resistor (3.3K) disposed in parallel to the contact of the second sensor to be monitored. This con
fi
guration makes it possible to
distinguish between an alarm/electrical fault state and a line sabotage state, both in the event of cutting and short-circuit. The alarms are correctly
recognised and assigned to the sensor from which they originate. The sabotage, however, can only be generically attributed to the wired line for
the input to which it is connected.
ALARM
ALARM
FAULT
C: SINGLE BALANCED
E: TRIPLE BALANCE
F: DOUBLE ZONE
F: DOUBLE ZONE WITH END OF LINE (EOL DOUBLE)
SENSOR 1
SENSOR 1
ALARM 1
ALARM 1
TAMPER 1
TAMPER 1
SENSOR 2
SENSOR 2
ALARM 2
ALARM 2
TAMPER 2
TAMPER 2
ALARM
TAMPER
TAMPER
D: DOUBLE BALANCED