6
IK-E366-001
Marking of the
contact
ASG-2000
Power supply 9 ÷ 30 V
DC
ASG-2000HV
Power supply 230 V AC
V1
+
L
V2
-
N
The detector has a contact selection terminal for common relay contacts, it is possible to select three
functions:
•
common contacts connected internally to terminal V1,
•
common contacts connected internally to terminal V2,
•
connection of an external signal to the COMM contact.
The default setting is to connect the common relay contacts to the V1 contact. The signalling diodes
are marked in Figure 1. The ASG-2001 and ASG-2002 detectors on the sensor module include a cover
with an anti-dust filter that protects not only against dust but also against small insects. In the ASG-
2003 detector, the sensor is insulated directly to the ventilation element.
!!! PLEASE NOTE
The total value of the loads of all relays is up to 3 A. This limitation results from the
internal connections of the detector.
5.
FUNCTIONAL DESCRIPTION.
Detectors in their principle of operation use the phenomenon of gas diffusion in the environment. The
ventilation element allows gas to enter the detector and reach the sensor. The microprocessor
measurement system continuously analyses the concentration of the measured gas and compares it
with the value of the appropriate alarm threshold. In the case of alarm thresholds expressed in
instantaneous values, a false alarm filter (shorter than 15s) has been added. The measuring system
also performs temperature compensation allowing the use of detectors in a wider temperature range.
After connecting the power supply, the detector is in the state of heating of the sensor, lasting 1
minute, during which the sensor pre-conditioning is conducted. The semiconductor sensors achieve
their full measurement efficiency after not less than 48 hours of uninterrupted power supply.
Table 4 describes the condition of the relay outputs depending on the detector status.
!!! PLEASE NOTE
No power supply if the A3/FLT contact function of the A3 alarm function is selected by
means of a jumper, this output is activated (relay contacts closed).
Table 5 describes the status of LEDs during correct operation, a Table 6 describes the status of the FLT
diode in various emergency states.
Table 4: Status of relay outputs depending on the condition.
STATUS
ALARM CONTACT OUTPUTS
Terminal A1
Terminal A2
Terminals A3/FLT
Position of the functional
jumper
A3
FLT
none
SUPERVISION
open
open
open
open
open
ALARM LEVEL 1
CLOSED
opened
opened
opened
opened
