EDS SCL-01 Manual

1
EDS - TECHNICAL INFORMATION
Explosion-proof
ATEX Spark Detector
SCL-01
TECHNICAL MANUAL
EDS srl - V. Ca' Nova Zampieri 6 - 37057 S. G. Lupatoto - VERONA - Tel. [phone] - Fax [phone]
Email: [email protected] - Web: www.eds.eu

2
EDS - TECHNICAL INFORMATION
SPARK DETECTOR
SCL-01
The SCL-01 is a spark detector suitable for the
detection of very fast sparks that can be
transported by pipelines of silos or warehouses
for the storage of flammable materials such as
sawdust, cotton yarn, cereal powders, metal
powders, etc. .
The possibility of detection in an extremely short
time of this detector can prevent the development
of a fire with serious consequences.
The SCL-01 detector is explosion proof ATEX
Ex-d. It must be installed according to the recent
legislation on the installation of electrical equipment
in potentially explosive atmospheres.
1- INSTRUCTIONS
1.1 - The detector can be used as standalone or
(recommended) with the EV521 or SCU-04 control
panels expecially designed for this application. They
are equipped with internal stabilized power supply,
test circuits, timers and relay outputs. In addition,
these control panels are equipped with special
circuits so that the response time of the system
results to be very short.
1.2 - Drill a hole of 130 mm (Fig. 7) diameter on
the surface of the pipe that must be surveilled.
1.3 - Install the equipment on the outer surface of
the pipe using the black O ring, the two fixing
brackets and the bolts supplied according to the
diagram shown in fig.6 and to the drill chart of fig.7.
The detector must “see” inside the pipe and the
surveilled area has not to be subject to
variations of ambient light.
1.4 - We suggest not change the distance between
the front of the detector and the outer surface of
the pipe. The viewing window of the detector, must
not extend too far inside the pipe, because this
could create obstacles to the transport of the
materials flowing in the pipe or start an encrustation
that can obscure the vision window.
1.5 - Connect the equipment as shown in the
schematic diagram in fig. 3 or according the technical
instructions of control panel EV521 or SCP-04 if
present.
1.6 - The detector can be powered by AC or DC
voltage 12/24V. To obtain a greater immunity to
electrical noise power should always be supplied by
a stabilized power supply with backup battery.
If you choose the voltage of 24V DC or AC, remove
the selection jumper JP9 (Fig. 3).
1.7 - The detector is equipped with a relay output.
Terminals are available on the terminal board (terminals
1-2-3). The relay can be operated normally energized
or normally not energized. For the selection of
operating mode use the jumper JP2 :
1-2 position - relay normally energize
2-3 position - relay normally not energized
The indication of the terminals on the terminal board
is referred to the normally not energized relay
operation.
1.8 - The detector has the possibility to be tested
remotely. By connecting an external button (NO
contact) to terminal 6 (TEST) and terminal 5
(GROUND) a periodic test of the detector can be
performed. When the button is remotely pressed, a
real spark is passing through the pipe is simulated,
and so the detector reacts activating its output relay.

3
EDS - TECHNICAL INFORMATION
1.9 - The detector has two internal settings (Figure
2)
- sensitivity level adjustment
- adjustment of the duration of the time of activation of
the output relay (using the jumpers JP3-4-5-6-7)
They must be adjusted to achieve optimum perfor-
mance
1.10 - The detector is equipped with internal
microprocessor which not only provides the operation
and check of electronics, but also provides the check
of the status of internal components. In case of fault
an output signal (FAULT) is generated. Also +5V is
generated on terminal 4 and it can be used for a
remote indication of a fault. The maximum generated
current is 10mA.
1.11 - The detector has a field of view of 90 ° (solid
angle) and is suitable for pipes with a diameter up to
50 cm. If the diameter is larger, or if the pipe section
is square, rectangular, etc.. to avoid dead zones
outside the field of view of the detector and have
ensure detection, we recommend using two detectors
installed diametrically opposite on the pipes surfaces.
1.12 - The output relay can be conveniently used to
actuate a solenoid valve that feeds a sprinkler spraying
nozzle to perform automatic extinguishing of the spark
in the pipeline. This nozzle therefore sprinkle water
for a time set by the setting of jumpers JP3-7
(adjustable between 0 - 10 seconds). We recommend
a time of about 5 seconds.
1.13 - When you want to be sure of the success of
extinguishing or in important plants, where security
must be at the highest level, we suggest to install a
second detector (or detectors couple) at a certain
distance from the first one, in order to have a second
check of extinguishing and if necessary a second try .
If the spark has already been extinguished the second
detector will remain inactive. Otherwise it react and
its output relay contact can be exploited to:
- activate a second sprinkler spraying nozzle for a
second extinguishing attempt
- activate a door shutter to prevent the spark from
being introduced into the silo
- activate a suitable audible warning
2- OPERATION VERIFICATION
2.1 - to verify the operation of the detector after
installation and the adjustments described in the
chapter 1, you must:
- power on to the detector
- wait 1 minute to allow the microprocessor to ope-
rate the various settings
- press the TEST button remotely connected to
terminals 6-5. If you use the EV521 control panel,
press the TEST button present on the front of the
unit or press the remote button connected to the
17-18 terminals of the control panel.
If you are not using the TEST button to check the
operation of the detector it’s necessary to cause a
real spark in his field of view. This must be done
only after taking adequate security measures
3- SYSTEM OPERATION
3.1 - With reference to fig. 5 relating to a system
with two detectors, if a spark passed in the viewing
field of the first detector, the detector SCL-01 enters
in alarm condition, and its output relay is energized
instantaneously and remains energized for an time
adjustable between 0-10 seconds (JP3-7). The
output contacts of this relay will be used to operate
the electrovalve VL1, which will cause the
intervention of the SS1 spraying nozzle for a first
extinguishing attempt.
3.2 - If the spark has been extinguished, the system
returns to the initial state of normal operation.
Otherwise the spark, continuing his flowing, will enter
in the viewing field of the second detector SCL-01.
This will activate its output relay. The output contacts
will operate the electrovalve VL2 causing the
activation of SS2 nozzle SS2 for a second
extinguishing attempt shutdown
4- RESPONSE TIMES
4.1 - The time delay to be taken into account in the
design of a spark detection system are as follows:
T1 - operating time of the spark detector SCL-01
T2 - operating time of the relay output of the spark
detector
T3 - signal processing time and operating time of

4
EDS - TECHNICAL INFORMATION
the relay output of EV521 (if present)
T4 - response time of VL electrovalve
T5 - time of water filling of the part of the pipe
between the electrovalve and the SS nozzle and
time of formation of the cone of extinguishing water
If the system does not use the EV521 control panel,
signal processing time and response time of the
relay output of EV521 (T3) should not be counted.
Usual values are as follows:
•T1 - 3-10 ms
•T2 - 12/15 ms
•T3 - 15 ms
•T4 - 10 ms
•T5 - depends on the length of the pipe, on the
pipe section and especially on the water pressure
4.2 - For the calculations we can consider the time
T1-T4 in 60 ms max.
Time T5 must be added to this sum. This time
depends on the pressure of the water, on the section
of the pipe and the nozzle used. With a nozzle
SP34F22 and pressure of 3-4 bar, a water speed
of approximately 4-6 m/s is obtained. Therefore, if
the section of tube between the electrovalve and
the nozzle is 1 m, the transit time is around 0.2 s.
Then summing the times T1-T5 leads to 0.26 s.
This time is the response time of the system.
5- NOZZLE POSITIONING
5.1 - The spraying nozzle has the function to
extinguish the spark.
Its position must be calculated as a function of times
indicated in the previous chapter, and the speed of
the fluid being transported within the pipe.
For a calculation of average value using the simple
formula derived from physics:
S = vt
where :
S = distance traveled in meters
v = speed of the fluid inside the pipe in m/s
t = response time of the security system
The speed of the fluid must be measured on site.
Typically you will get speeds of about :
timber industry 20-30 m / s
textile industry: 10-20 m / s
For other applications, you need a measurement.
Therefore, knowing the 3 fundamental parameters of
the formula, the calculation is very simple.
5.2 - Example:
fluid velocity: 25 m / s
response time: 0.25 s
is obtained:
S = 25 x 0.25 = 6.25 m (distance traveled by the
spark)
In this case, therefore, the spraying nozzle should be
positioned at more than 6.25 m (7-8 m) from the point
where the spark detector is installed, so that the spark
is extinguished by the water cone.
For designers is shown below the graph velocity of
the fluid as a function of the distance (fig. 1).
To decrease the response time of the system, as time
T5 has considerable influence, you must use:
•an higher water pressure (4-6 bar)
•a pipe with a larger cross-section
•a nozzle with higher flow rate (32-63 l/min)
To increase the water pressure is recommended the
use of an autoclave of 20-30 liters with pressure tank
and pump.
If the length of the pipe is considerable, to decrease
the pressure drop due to the loss of load, it is
recommended the use of a tank with the function of
flying-wheel function and unidirectional valve.
6 - MAINTENANCE
6.1 - The spark detector must be periodically cleaned.
The detector must be removed from its fixing brackets
and its optical viewing window should be cleaned with
a cloth moistened with water and traces of soap. Do
not use alcohol and any kind of solvent. This operation
must be carried out periodically according to the type
of fluid. The fluid flowing inside the pipe usually keeps
the viewing window clean because of rubbing. The
normal layer of dust that is deposited on the vision
window, does not influence its operation because the
infrared radiation passes through the layer.
6.2 - Periodically verify the mechanical parts of the
system. If you use a self-closing damper or a drainage
system of the fluid, it is necessary to periodically check
operation and lubricate the moving parts.

5
EDS - TECHNICAL INFORMATION
6.3 - Periodically check the operation and thightness
of the electrovalves. A defect in the seal can result in
flooding of the pipeline and can cause damage. It
would be good to install a tap and a filter to trap
impurities that may affect the electrovalve upstream
the valve. It would be also good to provide some
elements of water discharge somewhere along the
pipeline.
6.4 - If the installation is done outdoor the problem
of winter frost must be taken in account in the system.
The water pipe must be caulked and the elements
of the extinguishing system (electrovalve, pressure
gauge) must be insulated from freezing.
If these precautions are not enough, we suggest to
use an heating cable coupled to a thermostat to
ensure a temperature above 0° degrees.
6.5 - If the system is idle for long periods it is good
to empty the water supply pipe.
6.6 - Check the electrical connections (terminals,
connectors, etc..) Of the various elements of the
plant.
In particular, check the grounding of all metal parts.
7- STANDARD REFERENCES
The equipment has been designed to meet the
specifications of the following standards:
CEI 31-30
CEI 31-33
CEI 31-35
IEC 31-35A
CEI EN 60079-0
CEI EN 60079-1
8- WARNING
8.1 - The SCL01 spark detectors for areas with
explosive atmospheres, are specifically designed
to meet the requirements of official standards for
environments with danger of explosion. Improper
use, wrong connection, removing any protections,
inadequate inspection and maintenance or only a
marginal modification, may compromise the safety
and reliability of the unit, causing serious damage
to people and/or things.
Follow scrupulously the rules relating to the
connections and the use of electrical equipment in
areas with potentially explosive atmospheres.
The devices must be handled, installed, put into
service, operated, maintained and repaired by
qualified and experienced personnel with a thorough
knowledge of these regulations and in the absence
of an explosive atmosphere.
Please follow all instructions, instructions of the
installation, current safety laws and all applicable laws
concerning correct installation.
Any additional components in the system in special
execution or with other versions may differ in detail
from those described and may require additional
information.
9- TECHNICAL DATA
•power supply : 24 V AC-DC
•power consumption: 20 mA - 50 mA (alarm)
•internal voltage stabilizer
•electronics and microprocessor control
•circuit protectors against electric shock
•viewing angle: 90 °
•response time: 3-15 ms
•max distance. of detection : about 50 cm (size of
the spark approximately 1 mm T = 800 ° C)
•alarm LED indicator
•sensitivity adjustment: with trimmer
•alarm duration adjustment : 0 to 10 sec
•relay operation normally energized or not
energized
•relay output: 6A/24 V
•container: in light alloy
•entrance cables: 3/4" ISO7/1
•protection: EX-d IIC T6 IP66
•certifications: CESI 01 - ATEX 092
•dimensions: 200x130 mm
•weight: 2 Kg

6
EDS - TECHNICAL INFORMATION
fig.1
0
5
10
15
20
25
30
0510 15 20 25 30
velocità
del fluido
[m/s]
distanza
[m]
tempo di risposta
del sistema 0,25s
non usare
zona consigliata
fig.1
distance
System response
time 0.25 sec
Suggested area
do not use
fluid speed

7
EDS - TECHNICAL INFORMATION
-
LED ALLARME
JP7
TEMPO ATTRAZIONE
A
JP
4
JP
3
SENSIBILITA'
JP
6
+
ALARM LED
TIME ATTRACTION
JP
5
SENSITIVITY
A
Fig. 2
external view
Components side view
Attraction time for relay output.
Selection is done inserting the corresponding jumper (one only)
JP3 - 1 sec
JP4 - 2 sec
JP5 - 5 sec
JP6 - 10 sec
JP7 - the relay is attracted undefinitely to store the event. To
reset you must power-off the detector for a few seconds
fig.3
JP8
relay mode selection
TEST
NC
2
RELAY
24V
GROUND
JP2
COM
3
pulsante
cambiotensione
DS1211
ENERGIZED
V+
FAULT
RELE'
LED
settaggio rele'
push butto
n
NOT ENERGIZED
V-
NA
JP9
1
1K
voltage selection

8
EDS - TECHNICAL INFORMATION
Pipe Water feed pipe
Spraying NozzleSCL01 Spark Detector
Fig. 3 -Example of a system with one SCL-01
Fig. 4 - Example of system with 2 SCL-01
electrovalve
pressure gauge pressure gauge
electrovalve
nozzle nozzle
water supply pipe
water supply pipe
SCL01 Detector SCL01 Detector automatic shutter
Silo

9
EDS - TECHNICAL INFORMATION
fig.6
fig.7
80.0
160.0
Ø130.0
TEMPLATE
rondella
guarnizione
barra filettata M8
dado M8
rivelatore SCL-01
tubazione
rondella
nut M8
pipe
washer
threaded rod M8
washer
SCL-01 detector
seal
DS1207
SCL-01 SPARK DETECTOR
MECHANIC MOUNTING

10
EDS - TECHNICAL INFORMATION
fig.8
The information contained in this document have been carefully checked and are reliable. By the way EDS company is not responsable in any way for possible inaccurancies or errors and it reserves
the right to perform changes in any part of this document and/or product, to improve the quality, reliability or the design.
© Copyright 2002-2008 Electronic Detection Systems. All rights reserved
Date:02/04/2012
Filename:SCL01_inst-en_2019
Release : EV-586AB/ SW ver. 1.0
SCL-01 SPARK DETECTOR
DIMENTIONS

11
EDS - TECHNICAL INFORMATION
TECHNICAL INFORMATION
Explosion Proof Spark
Detector SCL-01
The EDS SCL01 Spark Detector is an electronic device suited to
detect spark in pipes and channels that transport varoius types of
combustible materials headed to a storing silo.
The execution is explosion proof EX-d IIC-T6 - ATEX certified.
So the detector is suitable to be installed in classified environments
where the installations must be explosion proof.
During the transporting phase, a spark, produced in the previous
manifacturing stages, can be transported mixed with the materials.
If this spark is not detected and neutralized very quickly, once it
arrives inside the silo, it can cause a fire or an explosion.
So the precise and quick detection of the spark, can be used to
prevent great damages and dangers to both people and things and
consequently to elevate the security level of the environment.
The SCL01 detector is able to reveal sparks that cross its viewing
range even if they have a great velocity (up to 100 km/h).
The detector is equipped with an optical head sensible to infrared
radiation, that has a viewing range of more than 90 degrees (solid
angle) and a suitable electronic circuit that provides for
amplification and processing of the signal.
When the SCL01 detector intercepts a spark it provides the
powering of a relay suitable to switch on optical and acoustic
alarms. Moreover a fire extinguishing system (splinker head
systems) can be activated.
For the former function it is suggested to use our EV 521 or
SCU04 control unit that has a great using flexibility.
ADVANTAGES
• signalling quickness and precision
• remote fuctioning test available
• solid metal box
• easy installation
• easy maintenance
APPLICATIONS
• wood industry:
sawdust
shavings
• textile industry:
cotton
all other fibres
• food industry:
cereals
If the pipes have a large diameter (over 0,5 m.) several SCL01
detectors can be used to obtain a better security level
.
If a water spraying automatic extinguishing system is also
present,the spark extinguishing can be verified.
If the transporting pipe has not a cylindric shape, for example
squared or rectangular, it can be necessary to use two opposed
detectors, to avoid dead zones external to the viewing range of the
detector.
The detector's box is made of fusion light alloy with IP65
protection, and so the internal electronics are protected from dust,
shocks and from ambient conditions, that can be also corrosive,
permitting to use the detector outdoor for a long time without any
problem.
The detector is supplied with a inox steel fixing stirrup to be easily
fixed on the pipes.
The maintenance of this detector is very simple and not frequently
required.
Supplied Materials
The standard supply materials include:
- 1 - SCL-01
- 1 - SUP-01 - inox steel fixing stirrup

12
EDS - TECHNICAL INFORMATION
TECHNICAL DATA
•power supply: 12/24 V dc and ac
•power consumption: 20 mA (no alarm) - 50 mA (alarm)
•solid viewing angle: 90 gradi
•max detection distance: about 50 cm
•sensitivity regulation
•relay activation time regulation: 1-10 sec
•terminals to connect a remote working test button
Installation example with two SCL-01
Installation example with SCL-01
•alarm led
•output relay: 6A/24V
•light alloy metal container
•cables mounth: 3/4" ISO 7/1
•explosion proof execution EX-d IIC T6 - IP66
•certifications: CESI 01 and ATEX 092
•dimensions: 200x130 mm
•weight: 2 Kg
water feed
pipe
electrovalve
pressure meter
SCL-01
transporting
pipe
nozzle
water cone
shutter SILO

13
EDS - TECHNICAL INFORMATION
TECNICAL INFORMATION
EDS-SRG-ET
- Pneumatic pistons: 2
- Material: galvanized steel
- Solenoid voltage: 220Vac, 110Vac, 24V ac,
24Vdc (specify when ordering)
VL-34-24 - electrovalve
- NC normally closed pilot operated
- Interception of liquid
- Body: brass and stainless steel
- Guide hose: stainless steel
- Connection: 3/4
- Differential pressure: 12 bar
SP__ - nozzle - material: OT
SP14F08 - connection: 1/4 "Female - 8 liters / mi-
nute
full cone 61 degrees
SP12M25 - connection: 1/2 "male - 18.6 l / m
full cone - 67 degrees
SP34F25 - connection: 3/4 "female-22 l / m
PRS-14-55 - pressure switch
- Pressure range: 2 to 5.5 bar
- Maximum pressure: 7 bar
- Rated current: 10A
- Exchange contact
- Execution: IP40
- Operating temperature: -35 to + 80 ° C
- Connection: G 1/4 "female
EDS 1335 - electromagnet
- Power: 24VDC
- Attraction force: 50 Kg
- Rated current: 46 mA
- Test button
- For control of fire door
Accessories for Spark
Detection Systems
- Max pressure: 20 bar
- Flow rate: 5 m3 / h (83litri/minuto)
- Electromagnet: 10 VA
- Voltage: 24VAC
- Service: continuous
- Temperature: -10 to + 60 ° C
- Protection: IP65
full cone - 67 degrees
SP34F7 - Attack: 3/4 "female-62 l / m
full cone - 92 degrees
SP34F32 - Attack: 3/4 "female-32 l / m
full cone - 90 degrees
SP12F10 - Attack: 1/2 "female-18 l / m
full cone - 67 degrees
SP12F120 - Attack: 1/2 "female-94 l / m
full cone - 90 degrees
- Minimum working pressure: 6 bar
- Closing time: 2 sec (diameter 200-480) -
3 sec (500-700) - 4 sec (750-1000)
- Position (horizontal / vertical): any
SIRLD-1 - sirena + lampeggatore
-- Power: 12/24Vcc-ca
- Orange
- Sound level: 105 dB
- Complete the basic BSP wall or BSM vertical