Fantini Cosmi S86 Bedienungsanleitung
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S84 - S85 - S86
Gas detection probes certified with ATEX, 4- 20mA,
for control units P81 and P82
Combustible gas detection probes, certified with ATEX II 2G Ex d IIC T6, to be used with the electronic control units
P81 and P82. The probes are available in 3 versions: S84 for methane gas and city gas, S85 for LPG and S86 for
carbon monoxide.
ELECTRICAL CHARACTERISTICS
Power supply: 11 ÷ 28Vdc.
Absorption: maximum 3.2W.
Output logic 4…20mA:
proportional logic 4mA = 0% LEL; 0 ppm
(default) 20mA = 100% LEL; 500 ppm
absorption logic 0mA = no alarm
(applications with 1 10mA = 1
st
threshold alarm
or 2 thresholds) 20mA = 2
nd
threshold alarm
reference selection
of the signal 4…20mA to 1/2 of jumpers with reference to power supply negative or positive signs
4…20mA output load resistance up to 200 at 12Vdc power supply and up to 200 ¸ 700 at 24Vdc power supplyΩ Ω Ω
Dimensions (mm)
2 orices
Ø 8
Gas type Operating ambient
temperature
Protection
degree
S84 Methane gas, or other light gases - 10 ÷ 50 °C IP65
S85 LPG gas (cylinder liquid gas) or other heavy gases - 10 ÷ 50 °C IP65
S86 CO carbon monoxide - 10 ÷ 50 °C IP65
21
STANDARDS AND APPROVALS
Complies with the directives/norms EMC 89/336/CEE, norm EN 50270.
Certified with ATEX II 2G Ex d IIC T6.
INSTALLATION
Sensor installation must be done in accordance with EN 60079-14 standard. As cable entry use the cable gland nipple of 1“ NPT
certified with ATEX and complies with the standards EN 60079-0 and EN 60079-1 (Ex d protection type).
The sensor must be connected to earth through the appropriate system (provided).
The installation depends of the gas type that must be detected:
approximately 20 ÷ 40 cm from the floor for gases heavier than air (LPG or gasoline fumes);
approximately 20 ÷ 40 cm from ceiling for gases lighter than air (METHANE)
approximately 1,5 ÷ 2 m above the floor for gases with the density similar to air (CO).
The basic sensor is set to have as reference
signal (4 ... 20mA) the negative sign of
power supply; to change this setting move
the set of three jumpers in the position JP2
as shown in the figure:
To realize the operation logic setting of the signal 4…20mA, act on the
5
th
dip-switch selector in the position S1, in particular:
ATTENTION: if the basic settings are changed the indications on the terminal
board TB1 will be reversed.
TERMINAL BOARD AND ELECTRICAL WIRING
REFERENCE SIGNAL SELECTION 4…20mA
LOGIC OPERATING SETTING OF THE SIGNAL 4 …. 20MA
INTERVENTION THRESHOLDS SETTING
To realize the intervention thresholds setting of the optional relay board, or 4…20mA output threshold operation, act on the first four
selectors of the dip-switch, in the position S1; in particular the thresholds, expressed in percentage of the bottom scale, will be:
morsettiera TB1
12...24 cVd
4...20mA
+
-
-
+
scheda sensore
dip-switch S1
connettore CN4 per terminale
slitta di ancoraggio
+
Rif. al - (default) Rif. al +
-
1 2 3 4 5 6 7 8
ON
1 2 3 4 5 6 7 8
ON
1 2 3 4 5 6 7 8
ON
1 2 3 4 5 6 7 8
ON
1 2 3 4 5 6 7 8
ON
1 2 3 4 5 6 7 8
ON
1 2 3 4 5 6 7 8
ON
1 2 3 4 5 6 7 8
ON
1 2 3 4 5 6 7 8
ON
1 2 3 4 5 6 7 8
ON
1 2 3 4 5 6 7 8
ON
1 2 3 4 5 6 7 8
ON
1 2 3 4 5 6 7 8
ON
1 2 3 4 5 6 7 8
ON
1 2 3 4 5 6 7 8
ON
1 2 3 4 5 6 7 8
ON
1 2 3 4 5 6 7 8
ON
10 - 20 - 40%
(DEF
AULT)
3 - 5 - 10%
10, 25, 35% 15, 25, 40% 15, 30, 45% 25, 35, 50% 20, 40, 60%
20, 40, 80% -----------------F ------------------
5 - 10 - 15% 10 - 15 - 25% 10 - 15 - 30%5 - 10 - 20%
Signal polarity - (default) Signal polarity +
Terminal board TB1
Jumpers pair JP2
Dip-switch S1
CN4 connector for operation
and maintenance terminal
Mounting support
for relay board
Relay board (optional)
code 1590080
Sensor board
Future developments
22
OPERATION
S84-85-86 probes are used to detect the presence of methane gas, LPG, carbon monoxide (CO), gasoline fumes and upon request,
acetylene, hydrogen, ammonia, propane, octane and ethyl alcohol in areas classified in industrial environments and heating plants.
S84-85-86 probes shall be provided for a stand-alone operation with 4 ... 20mA output, and optionally, with no 4 relay outputs with
voltage free changeover contacts, respectively for:
previous warning (pre-alarm),
1
st
alarm threshold,
2
nd
alarm threshold,
faulty sensor.
In case of gas leak the probe compares the value of the measured concentration with the intervention thresholds, set by activating
the relays associated with them. The information about the value of the measured concentration is always present on the output 4 ...
20mA.
The average life time of the probes is calculated taking into consideration a typical use in a normally free of contaminants environment.
A more frequent presence and in higher concentrations of these substances can accelerate the normal oxidation process of the
sensing element, resulting with its life time decrease.
The system, once put into operation, must be left in working condition until the sensors life time has ended.
It is not recommended the seasonal work.
Up to three intervention thresholds.
Led on the sensing element to indicate the operation status.
Automatic counting of the sensors life time.
Device power supply is realized during sensor preheating phase, that has a duration of about 2 minutes. After this time has ended,
the sensor will pass in normal operation status, however the best performance you can get after a period of approximately 2 hours.
height m
surface covering m²
20 30 40 50 80 100 200
9
8
7
6
5
4
3
2
1
Probes number to be installed in an environment is proportional
to its surface and its height.
Considering the multitude of variables that determine this
parameter (see the figure at the right), the diagram that
follows should be considered as simple help and not as rule for
installation.
Depending on the distance, use as connection a cable with at
least 3 conductors with minimum section of 0,75mm² up to
100m, 1mm² up to 200m, 1,5mm² up to 500m. In the presence of
electromagnetic disturbances use shielded cable. If is present
the relay board, use a multipole cable suitable for number of
connections. Cable sheath should not exceed the diameter
provided for the cable gland.
ATTENTION: the safety is guaranteed, provided that the cover is properly screwed and fastened.
Screw the cover in clockwise direction making sure that, at the end of operation, remains a space between housing and cover, not
more than 0,5 mm. This ensures the perfect closure. Remember to tighten the hexagonal head fitting pin placed on the circumference
of the same cover.
The indication <<DO NOT OPEN UNDER TENSION>>, clearly indicated on the cover, must be absolutely respected.
Is necessary to open the windows or the doors for room aeration before opening the cover of the sensor.
The positioning of the probes must be taken into consideration, in addition to the above-mentioned general rules, including the
following rules of installation. The probes must be installed:
close to gas leaks possible areas;
at least 1,5 m from heat sources and ventilation openings;
never in poorly ventilated areas where may be detected the gas;
far from obstacles that can impede natural circulation of the gas;
not in the immediate vicinity of machines that during normal operation can produce functional losses;
in environments where the atmospheric conditions are between -20°C and 50°C and the relative humidity is less than 90%
without condensation;
probes mounting and dismantling must be done when the unit is not powered.
Produktspezifikationen
| Marke: | Fantini Cosmi |
| Kategorie: | Nicht kategorisiert |
| Modell: | S86 |
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