detectors
Output 1 Supervised (monitored) voltage output, 24V DC 58 , max 200 mA (Fuse F2).
15 Fire Door Closing
Programmable outputs can be used for fire door closing.84 A special trigger condition is available (Fire Door Closing.). Type of output is normally "Control, neutral". One or more alarm points can control the output, i.e. the detectors on both sides of the fire door.
NOTE! The alarm points and their "belonging" output have to be in / connected to the same c.i.e.
In case of one of the following "events", the output will be activated, i.e. the fire door will close:
Fire alarm (any of the detectors controlling the fire door)
Fire alarm in "Test mode" (any of the detectors controlling the fire door)
Fault (i.e. "no answer" from any of the detectors controlling the fire door 85)
Disablement (any of the detectors controlling the fire door, the zone(s) involved or the COM loop involved)86
A definite time every day, if programmed via WinG3. The output will be activated for 20 seconds.
Via a programmable input (trigger condition "Door Closing Test Input"). The output will be activated for 20 seconds. The input has to be in / connected to the same c.i.e. as the alarm points and their "belonging" output.
NOTE!
Zone line inputs (via 4580) cannot be used for this type of Fire Door Closing.
If a magnet contact is available, is it possible to get a "closed fire door verification" via the Interlocking function. In this case, Type of output has to be "Interlocking output". See also chapter "Interlocking function", page 84.
84 In the DBI (Danish) convention, must only the c.i.e. outputs R0-R1 and
S0-S3 be used and "Type of output" has to be "Control, neutral".
85
E.g. if the detector is faulty, if there are two breaks or short-circuit on the COM loop.
86 If an I/O unit 3361 output is used, it is recommended, for safety reasons, to
not connect it to the same COM loop as the detectors controlling the fire door.
89
16
Functions / Services / Features
Some Functions / Services / Features require programming in WinG3, see chapter "PC software (S/W)", page 15. For more information see also EBL512 G3 Operating Instructions MEW01163 and WinG3 help. How to connect the PC and more information, see EBL512 G3 Operating Instructions MEW01163 chapter "Programming (SSD download)", "New system program (S/W) version download" and "EBL512 G3 settings download".
16.1
Sensor value
An analog smoke detector is like a "sensor". It detects its environment at all times. Each detected analog value is, in the detector, converted to a digital "sensor value", which for each individual detector, is continuously picked up and evaluated by EBL512 G3. In Figure 17 the (digital) sensor values (during a certain time) are represented by the graph "Working level".
16.2
Week average sensor value
Each hour, one sensor value is stored in a special memory (in EBL512 G3) and each week, these stored sensor values are used for a "week average sensor value" calculation.87 This is done for each analog smoke detector individually. In Figure 17 the (digital) week average sensor values (during a certain time) are represented by the graph "Week average sensor value" (B).
Each analog smoke detector has a default sensor value = 1 and a week average sensor value = 1 (i.e. at Time = 0).
A "fire alarm offset" (value) is added to the week average sensor value to get each detector's "Fire alarm level", i.e. the fire alarm level will be adjusted in relation to each new week average sensor value in order to keep the detector's fire alarm sensitivity constant. The fire alarm level is in Figure 17 represented by the graph "Fire alarm level" (C) - parallel with the graph "Week average sensor valu" (B).
In Figure 17 (at Time = 0):
The week average sensor value (B) is 1 (=0.1 %/m)
Fire alarm offset is 3 %/m, i.e. the fire alarm level (C) is 0.1+3=3.1 %/m.
Service signal will be given when the week average sensor value for a detector has reached the fixed service signal level (1.8 %/m), i.e. the detector is "dirty" and has to be replaced. See "Service level" (D) in Figure 17.
87 The week average sensor value will be calculated within 2 minutes after
any restart, i.e. also after SSD download. During these "2 min." all analog smoke detector fire alarms are suppressed.
0 1 2 4 6 8 10 12 1.8 0.1 3.1 Time Sensor value Obsc. in % / m
Sensor value (A)
Smoke puff
or disturbance or disturbanceSmoke puff
Fire alarm level (C)
Week average sensor value (B) Constant sensitivity Service level (D) Service signal given Fire alarm offset 3.0 %
Figure 17. The basic working principle for an analog smoke detector ("sensor"). Sensor value (A), Week average sensor value (B), Fire alarm offset (3 %/m), Fire alarm level (C) and Service level (D).
"Sensor Information" is available via menu H4/U4. Via WinG3 and a PC connected to EBL512 G3 you can get "Sensor Information" for all analog detectors on a COM loop or an individual detector. For an individual detector you can also get continuous information:
Technical no. | Zone-Address | Min. | Max. | Momentary | Weekly | Performance factor.
Also via the Web-server II 1598 you can get "Sensor Information" for all analog detectors on a COM loop.
The smoke detector sensor values are presented as obscuration in % per meter (%/m). (Heat detector values as °C.)
16.3
Decision value
In order to secure real fire alarms and reduce the nuisance alarms, a decision value is calculated. The decision value is used to decide if it is normal state, pre-warning, fire alarm or heavy smoke alarm and also in the smouldering smoke algorithm (see page 94). The decision value is calculated, see chapter "Filtering algorithm, page 92.