10
1.4.2
Inputs
1.4.2.1
The control panel provides monitoring of 20 inputs for connecting fire (intrusion,
alarm or auxiliary) input circuits with normally open/ closed internal contacts.
Monitoring is based on the measuring of the input circuit resistance.
1.4.2.2
Device inputs can accommodate any types of intrusion and fire detectors designed
to operate at constant voltage. In this case, the internal resistance of the detector in the
alarm mode (‘triggering’) should be:
- no more than 2.7 kΩ for normally open detectors (closed state);
- not less than 3.2 kΩ for normally closed detectors (open state).
1.4.2.3
In the quiescent mode, the panel provides inputs with a constant voltage from 19 to 24 V
with an end-of-line resistor of 4.7 kΩ ± 5% and a detectors current consumption from 0 mA to 3 mA.
1.4.2.4
The effective value of the ripple voltage in the circuit is no more than 20 mV.
1.4.2.5
If one of the inputs is short-circuited, the device provides voltage at the other inputs as
described 1.4.2.3. Long-term closure of more than 3 input circuits at the same time is not allowed.
1.4.2.6
The panel provides limiting the short-circuit current of the input at the level of no more
than 26.5 mA.
1.4.2.7
The panel disconnects the input-circuit voltage to return automatic current-consuming
detectors to the quiescent mode during arming (while resetting alarms).
The duration of the power disconnection is 3.0 s.
The panel power off each input individually.
1.4.2.8
Parameters of communication lines ensuring normal operation of fire input circuits
connected to the control panel inputs are as follows:
- wire resistance without taking into account the terminal resistor is no more than 100 Ω;
- insulation resistance between the input wires is not less than 50 kΩ;
- insulation resistance between input wires and wires of other inputs is not less than 50
kΩ;
- insulation resistance between each wire and ‘earth’ is not less than 50 kΩ.
1.4.2.9
Parameters of communication lines ensuring normal operation of intrusion input circuits
connected to the panel inputs are as follows:
- wire resistance without taking into account the terminal resistor - no more than 1 kΩ;
- insulation resistance between input wires not less than 20 kΩ;
- insulation resistance between input wires and wires of other inputs is not less than 20
kΩ;
- insulation resistance between each wire and ‘earth’ is not less than 20 kΩ.
1.4.2.10
The logical state of the input is defined by:
–
its type;