EDS RK 75 B User manual

1
EDS-TECHNICALINFORMATION
OPTICAL BEAM
SMOKE
DETECTOR
RK 75 B
TECHNICAL MANUAL
OPERATING INSTRUCTIONS
POWER SUPPLY 12/24 Vdc

2
EDS-TECHNICALINFORMATION
LINEAR SMOKE
DETECTOR RK 75 B
The RK75B detector is a newly-conceived linear
smoke detector that bases its working concept on
theinteractionbetweenthesmokepresentinaroom
and an infrared beam emitted by a transmitter and
directed to a receiver placed on the opposite wall
of the room to be protected.
To install it correctly, we recommend to read and
to follow our instructions carefully.The excellent
working results of the device will widely com-
pensatethe time spentin reading theseinstructions.
1-OPERATING INSTRUCTIONS
1.1-Transmitter-Unmountthedetector'sbodyfrom
theflushmountingbox takingoff the4screws.
1.2- Install the flush mounting box safely inside the
wall. Be careful to allign the box border with the
wall's surface. The border has not to be flushed into
thewallmore thanafewmillimeterstoavoidoptical
problems (fig.2). The box has to be installed 30-50
cm. below the level of the ceiling.
1.3- Put the guide tube and the cables inside the
box using the blowable holes marked on the box
topassthem through.
1.4-Re-mountthedetector'sbodywiththe4screws.
1.5- Receiver- Installthereceiveron the opposite
wall at the same height of the trasmitter. It's not
necessary that the receiver is placed perfectly in
front of the detector (an angle difference up to 8
degrees in all directions is allowed).
2 - WIRING
2.1 - Receiver - Connection cables. The small
current of the device (14 mA with normally not
powered relay and 25 mA with normally powered
relay) allows to use small cable sections. A
shielded cable (8 wires + external shield - 2x1 +
6x0,22mmq) is suggested. With this kind of cable
it’s possible to have a remote signal:
the alarm signal (COM-NA-NC terminals)
the prealarm signal (OC terminal)
the signal level remote measure (TP1 terminal)
the detector remote control terminals
(sensitivity adjustment) (TP2-TP3 terminals)
thepowersupply of detector (- and + terminals)
the cable shielding must bewiredonlyon one
side (see fig. 9)
2.2 - Transmitter - (current 4mA) - we suggest a
shielded cable with a suitable size for the
distance.Whenyou use more detectors, wesuggest
to install all the transmitters on the same side and
to supply power to them in paralled mode.
3-ELECTRICAL CONNECTIONS
3.1 - Connect the device cables as shown on the
labelsfacingthe terminal boards (fig.8). The given
symbols indicate what follows:
OC Open Collector - prealarm output. It is
possible to connect this terminal to the optional
EV450 to have a sound signal or a led for a
optical signal (see fig.9) for the prealarm,
maximunoutput current = 50mA.
TP2-TP3. They must be connected to the
optional external accessory (EV570) for the re-
motecontrol ofthe sensitivity.Otherwiseitmust
beunconnected.
TP1. Test point 1. It allows to measure the
signal level.This operation is carried out
connecting the accessory STS01 on the
connector of the printed circuit (see fig. 7) or
using a voltmeter connected between TP1 and
the negative [terminal (-), ground].
COM-NA-NC. Alarm relay. The showed
connection is valid when the detector is not in
alarm condition and the JP3 jump is in position
2-3.The CO-NA-NC terminalsarevoltage free.
(-)(+) inputterminals12/24Vcc.Selecttheright
voltageusing of thejumper JP4 (seefig. 8).The
given polarities must be respected.

3
EDS-TECHNICALINFORMATION
4-OPTICALALIGNMENT
4.1- Go on with the opticalalignmentbetweenthe
transmitterand the receiver.To make thisoperation
easier, we recommend to do it in a reduced light
environment and to proceed as follows.
a) shift the JP2 jump to position 2-3 and rotate
the P4 internal trimmer for the sensitivity
regulation fully clockwise (to the highest
sensitivity). See P4 trimmer in the scheme fig. 8.
b) place a lamp that can emit a concentrated and
sufficiently bright beam (we recommend our
LAL02 lamp to execute the optical alignment
exactly) in front of the receiver. Point the lamp
beam right to the transmitter lens (fig. 3).
c)look at the screen behind the lens of the
transmitter through the slit placed on the lens
support.Abright point representingthe lampimage
will be visible on it.Adjust the optical equipment,
using the proper V screws (see fig. 7) and the key
included, so that the bright point falls in the
screen's center where there's a small hole through
which the photoemitting diode can be seen. It is
important that the bright point drops on the
photoemitting zone of the photodiode (fig. 4).
Using this procedure the receiver should be
perfectly optically aligned to the transmitter.
4.2 - Bring the lamp from the receiver to the
transmitter and place it in front of it. Repeat the
same suitable operations of 4.1 this time directing
thelight beam to the lens of the receiver.
4.3- The bright point that willappearon the screen
set behind the lens of the receiver, must fall to the
center of the photosensitive element that is found
behind the screen in match of the small hole on it
practised. In such way the receiver will optically
be found lined up with its transmitter.The small
bug of due possible angle to the fact that the lamp
has not exactly been set on the axle of the lens, is
negligiblegenerallyandeasilyeliminablethrough
following small regulations.
5 - SETUP
5.1 - Power up the device. If the previous optical
alignementoperations havebeen carefully carried
out, the following conditions of the receiver must
be found:
internal red LED light switched off
internal yellow LED light switched off
alarm relay R not powered or powered.
This depends on the position of the JP3 jump (see
fig. 8)
buzzer or LED connected to the OC output
terminal not powered (see fig. 9)
voltage at terminal TP1 (see 3.1) higher than 3 V
5.2 - Looking at the instrument's measure
(connected between TP1 and negative terminal)
adjustthe V screws slowly to obtainthe maximum
output signal. If this operation is not sufficient to
obtain a good output, it means that the optical
alignment with the trasmitter has been done
incorrectly.
5.3- The transmitter emits a conic beam, whose
form and size related to the distance are shown in
figures 5 and 6. It is important that the receiver is
inthe center ofthebeam emitted bythe transmitter,
because in these conditions, even if some small
movements of the wall or surface on which the
device is assembled occur (caused by the strains),
the receiver always remains inside the beam. To
obtain this, the delicate alignment operations with
signal measure, as decribed in points 4.1and 5.2,
must be carried out with the greatest care.
5.4-Adjustthe sensitivityoperatingon P4 trimmer
and remembering what follows:
highsensitivity isobtainedwith signalsbetween
3 and 5V (between TP1 and negative terminal)
medium sensitivity is obtained with 5-8 V
low sensitivity is obtained with 8 V or more
Remember that the adjusted signal is subjected to
a lowering of about 1 V when the device cover is
assembled, due to the frontal mask absorption.
Therefore the signal must be increased of about
1 V to be obtain a perfect adjustment.
5.5 - The sensitivity is to be adjusted according
to the environmental situation. Normally the level
is set for a medium sensitivity, but in case of dusty
environments (furniture factories, ecc) it is better
to use a lower sensitivity (8 V and over).
5.6- Thedeviceisfactoryset toworkwithnormally
notpoweredrelays. If you wish to have the opposite
situation operate on the JP3 jump as follows:
pos. 1-2 normally powered relay
pos. 2-3 normally not powered relay
Remember that in pos. 2-3 the device power
comsumptionrisesfrom14 mA to 28 mA.

4
EDS-TECHNICALINFORMATION
6-WORKINGTEST
6.1 - Verify the detector's working putting a
opaque panel in front of the receiver. As soon as
the signal drops under the threshold level of
prealarm (3 V), the yellow LED must flash.
Ifyouletthesignaldrop under the alarm threshold
level (2 V), after a 6" delay the red LED must light
up and the alarm relay must be powered.
7-SETTINGTHE DETECTOR FOR HIGH
SENSITIVITY
7.1 -You can let RK75B detector work at an even
higher sensitivity than the one given above (3-5
V). In this case it is necessary to act as follows:
measure the voltage between the negative
terminal and the test point TP3, which is near
by prealarm led LD2 (see fig. 8), with a 10 V
full-scale high impedance voltmeter
themeasuredvoltagewillbe3V(factoryadjusted)
adjust the P6 trimmer to obtain a voltage from
3 V to 2,2 - 2,5 V
adjust the P4 trimmer in such to obtain a 2,7-3
V between TP1 and negative terminal.
Anyway,becareful,becauseinsuchconditionseven
a little drop of the signal is enough to generate an
alarm.Iftheenvironmentalconditionsarefavourable,
thehighstabilityofthedetectorcircuitsallowsavery
goodperformanceeven insuchlimitconditions.
8 - SETTINGTHE DETECTOR FOR
SHORTDISTANCE
8.1 - If the RK75B detector works on a short
distance , in some cases the JP1 jumper must be
shifted to the pos. 2-3, to reduce the emitted beam
power and to get a good adjustment. In this case
we have a power reduction of about 50%.
Therefore we have:
pos. 2-3 power reduced of 50%
pos. 1-2 nominal power
Inthisoperationdon’tgivesatisfactoryresultsitisbesides
possibletodoafineadjustmentusingtheP3trimmer:
- counterclockwise the signal between TP1 and
negative terminal reducesgradually
- clockwise the signal increases
We suggest to do this adjustment only if stricly
needed.9- REMOTE DETECTOR CONTROL
9- REMOTE CONTROL
9.1- The remote adjustment of the sensitivity can
be adequately done using the optional modules
EV570 (electronic voltmeter) and EV450
(piezoelectricbuzzer),remote connected as shown
in the schematic of fig. 9
9.2 - If you want to have the remote adjustment of
thesensitivitydon’tforgettoshifttheinnerJP2iumper
from pos. 2-3 to pos. 1-2. In this way the internal P4
trimmer for the sensitivity adjustment, is turned off
andtheoutputterminalsTP2-TP3fortheconnection
with the external trimmer assembled on the module
EV570 (see fig. 9) are switched on.
10-MAINTENANCE
10.1 - The RK75B detector needs a simple and
periodic maintenance. It can be programmed or
madeautomatic with thesuitablesignal given from
thethe detector.When the RK75B goesin prealarm
condition, it outputs the following prealarm signal
activatingofthestatic output OC PRE-AL (OPEN
COLLECTOR). It's suggested to use this signal
because it gives a precise indication of the need
ofmaintenance.
10.2 - The maintenance operations are the
following:
cleaning of the plastic cover of detector. It is
suggested to use a cloth dampened with water
and some little drops of soap. Never use alco-
ol, ammonia and others similar products.
control an tight the internal terminals block.
controltheopticalaligmentbetweenthetrasmitter
and receiver if the surface or the wall on which
theyaremounted, is subjecttodeformation.

5
EDS-TECHNICALINFORMATION
ACCESSORIESFOR RK75B
STS01 Instrument for the
measuring of signal. It can
be assembled in the
internal circuit during the
opticalalignment.
SC05 Plastic boxes to
lodge2modulesEV570or
EV450.Dimensions:
97x55,5mm.
LAL02 Lamp for optical
alignment. The RK75B
detectors must be aligned
with the reflector. This
lamp is able to realized an
optimum alignment. The
operation is simple and it
assure the most
functionality of detectors.
TheLAL/02is provided of
cable L.=15 m with
tweewers for the
connection to a battery 12
V for the power supply.
TECHNICALDATA
Power supply: 12/24 Vcc (-10+20%)
Protectionagainst inversion of polarity
Current: receiver: 10 mA with normally de-energized alarm
relay, 25mAwithnormally enegized alarm relay
sensitivity adjustment:with internal trimmeror remote (withthe
accessory EV570) - trasmitter: 4mA
red LED for the indication of alarm
redYELLOWfor the indication of prealarm condition
output alarm realy: 1A/24 V cc
prealarmoutput:(OpenCollector-transitorNPN)50mAoutputmax
trimmer for the regulation of the prealarm trigger point
opticalrange: 60m
detected area: max 600 mq
protectionclass: IP50 (IEC 529-144)
dimensions:162x62x63mm
plastic box (base red or black a choise - cover black)
weight:250 gr.
EV570 This module allows to
obtain:
- the remote measuring of the
detector RK75B signal
- the remote signaling of the
detector prealarm condition
- the remote set point of the
detector sensitivity.
Dimensions:107x25x42 mm.
EV450 This module signals
acoustically the coming into a
prealarm condition of one or more
RK75B detectors.
Dimensions:107x52x42 mm.

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EDS-TECHNICALINFORMATION
fig. 1
fig. 2
fig.5
fig. 6
fig. 7
fig. 3
beam diameter [cm]
distance [m]
infrared emitting area
screen hole
white screen
fig. 4

7
EDS-TECHNICALINFORMATION
Fig. 8
TRANSMITTER
RECEIVER
RELAY
P3
P4
JP1
JP2 LD1
P6
LD2
JP3
N.C.
N.A.
COM
TP1
TP2
TP3
O.C.
TP3
2
3
123
123
VV
V
beam power
high(1-2)/low(2-3)
beam receiver
optical adjustement
relay switch
energized/non energized
alarm relay
trimmer for
short distance
sensitivity switch regulation
external/internal
sensitivity
regulation
alarm LED
prealarm LED
prealarm level
set
connector for
STS 01 level meter
JP4
3
2
1
24V
12V
voltage changer
12/24V
P5
TP4
test point
prealarm levelalarm level
test point
set
alarm level
low
high
JP1
1
2
3
potenza del raggio
alta/bassa
sezione trasmittenteregolazione equipaggio
ottico
cambio
tensione
12/24V
2
3
12V
24V
JP4
optical adjustement
beam power
high(1-2)/low(2-3)
voltage changer
12/24V
beam transmitter
+
_
+
_

8
EDS-TECHNICALINFORMATION
fig. 9

9
EDS-TECHNICALINFORMATION
The example shows the connection among nr. 5
RK75B and the alarm station. Furthermore it is
indicated the connection with the modules EV570
(electronic voltmetre) and EV450 (piezoelectric
buzzer) allowing.
- visualization of the signal level measure
- the sensitivity remote adjustment
- the remote indication of the detector prealarm
conditions
fig. 10
The modules EV570 (electronic voltmeter) show
the signal level and permits the sensitivity
adjustmentof thedetectors towhichit isconnected.
The module EV450 (piezoelectric buzzer) gives
an acoustical signal when one of the detectors in
prealarm condition. This module can control 5
detectors at the same time.

10
EDS-TECHNICALINFORMATION
fig. 11
The example shows the connection among 10
RK75b detectors the alarm station and the
accessories ( modules EV570 and EV450)
Note thatevery 5 detectorsis connectedamodule
EV450

11
EDS-TECHNICALINFORMATION
RK75BSMOKE DETECTOR
DETECTEDAREA
b - roof with shed beams
2- The given limitscanbe subjected to variations
accordineto theenvironmentalcharacteristicsand
the requested response quickness :
1-The smoke detector RK75B has the following
maximun limits relative to the protected area.
- lenght: mt. 60
- width: mt. 15 (in order to obtain shorter
response times mt. 10 are suggested)
- protected area: 60x15 = 900 sq. mt.
In this particularly favourable case the covered
width M can be max mt. 20 and the detector is to
be installed in position A.
If the room is higher than mt. 8 from the ground
(e.g. mt. 12,20), it’s suggested to install another
detector in a lower position
Ex: vault height P = mt. 20
position A H1 = 20-1 = mt. 19
position B H2 = mt. 7
a - vaulted roof
The max covered width M must be = mt. 15. The
detector is to be installed in position A at least
mt. 30-50 under the beam, that is:
H = Q - 30 (cm)
c - roof with regular beams
The same comments as in b case are valid
d - flat roof
The contained informations in this document have been carefully valued
and are reliable. In every case the EDS company doesn't assume
responsibility for possible inaccuracy and she reserve the right to
perform changes in any part of this document and/or product, to improve
the quality, reliability or the design.
Anexampleofinstallation
Data: structure of indutrial shed
- length: mt. 40
- width: mt. 30
- roof height: mt. 6
- kind of roof: flat
Two detectors installed as show in the picture
are requested
Themax covered widht Mis mt. 15. Thedetecors
is to be installed in position A, at least cm. 30-
50 from the roof.
A
B
60