GENERAL FEATURES
The 601PH detector forms part of the series 600 range of plug in detectors for ceiling mounting.
601PH detectors react to the complete range of fire products, from sl ow smoldering fires , producing vi sible par ticles to open
flaming fires producing large numbers of very hot smaller sized aerosols.
The combination of optical and heat technolog y allows detection of clear burning fire products wh ich until now could o nly be
detected by ion-chamber detectors.
For normal ambient conditions 601PH will behave as a norma l optical smoke detector, only when a r apid rise in temperat ure
is detected does the sensitivity of the detector increase and the presence of smoke will confirm a fire condition which will be
transmitted as an alarm level. The 601 PH design incorporates a unique “mousehole” optical chamber with an unrivaled signal
to noise ratio providing high resilience to dust and dirt which means reduced servicing cost. In addition a unique chamber
cover actually draws slow moving smoke into the chamber to provide a more responsive detector.
OPERATING PRINCIPLE
Smoke detection
The 601PH detects visible particles produced in fires
by using the light scattering properties of the particles.
The optical system consist of an emitter and
receiver, so arranged that their optical axes cross in
the sampling volume.
The emitter produces a narrow beam of light which
is prevented from reaching the sensor directly by the
baffles. When smoke is present in the sampling volume, a proportion of the light is scattered, some of
which reaches the receiver.
For a given type of smoke, the light reaching the
sensor is proportional to the smoke density. The
amplified output from the sensor is used to activate
an alarm circuit at a predetermined threshold.
Thermal measuring system
The thermal mesuring system is designed to detect the presence of horizontally moving hot air draughts moving across the
ceiling which occour in a fast burning fire.
The system consist of two fast responding negative temperature thermistors. A sensing thermistor is located above the
labyrinth under the cover in the airstream and will detect any sudden changes in the air temperature or draughts of hot air
moving across the ceiling.
The second thermistor is located out of the airflow , but still within the smoke labyrinth and has a longer time costant and is
601PH
HIGH PERFORMANCE
OPTICAL SMOKE DETECTOR
Fins
Smoke path
Sampling Volume
Baffles
Emitter Photo detector
Sampling Volume
Fins
Sensing
Reference
Fig. 1 System schematic
Ordering code: 516.600.002.B
EN54 part 7: 2000 standard - LPCB approved.
SPECIFICATIONS
Min typ Max
Operating voltage 10.5V 24V 33V
Average quiescient current 62µ A65µ A70µ A
S tab ilisation tim e 30 sec
A larm C urre nt see Fig. 3 / (m A)
H o ld i ng V o lta g e 2V
Holding Current 0.4mA
Reset Time 2 sec
Remote Led Drive 1kΩ
Tem perature Alarm Threshold 54°C 60°C 65°C
Normal Response Threshold 0,12 dB/m -2,7 % /m
Response threshold in case of rapid temperature rise>10°C 0.05 dB/m -1.1% /m
Size HxD 43x109 mm
Weight 0,093Kg
Operating tem perature
-2 0 ° C .. + 7 0 °C
(Do not install in locations where norm al
ambient tem perature is below 0°C)
Storage tem perature -25°C .. +80°C
M A X e nviro nm e ntal R elative hum id ity 9 5 % no n-c o nde ns ing
Fig. 2 Connection diagram.
The Manufacturer reserves the right to change the technical specifications of this product without prior notice.
Fig. 4 Fit the detector unit onto the base (as per figure ) then twist
clockwise.
used as a temperature reference to compare the sensing thermistor against.
At a given temperature differential between the two thermistors, the comparator will switch and increase the gain of the
amplifier, thereby increasing the sensitivity of the smoke sensor.
Fins located on the top of the labyrinth are designed to increase air turbulence and the efficiency of the sensing thermistor.
WIRING
The detector circuits requires a p ositi ve an d n egative su pply a nd these are wired to t erminals L1 and L on the base (Polarity
insensitive). Base terminal L2 is connected to base terminal L1 when the detector is fitted to provide continuity monitoring
through the detector. Base terminals L2 and L provide outputs to the next detector or EOL device.
In case of alarm the detector comunicate the stat e to control device b y sinking from the supply le ads an extra current according to the figure 3, for restoring from a n alarm condition the power has to be removed for 2-5 seconds.
A drive is provided for a remote indicator connected b etween suppl y + and t erminal R, there fore at a det ector where remot e
indicator is connected, the polarity of the supply must be known.
INSTALLATION
The 601PH is designed to become enanched by detecting a rapid rise (>10°C) in air moving horizontally across the ceiling.
Siting sensor in positions where air is being blown through the detector should ther efore be pa rticul ary avo ided, eg. cl ose to
ceiling ducts or ceiling mounted industrial heaters or areas of forced ventilations.
MAINTENANCE
The length of time between service for each detector will depend upon the environment into which they are installed. It is
recommended to Inspect, test and clean the detector at least annually.
The detector must be removed for service replacement typically each 5 years (up to 10 years subject to environment).
Fig. 3 Alarm load.
0
5
10
15
20
25
30
35
40
45
50
55
60
65
70
024 6810121416182022242628303234
Detector voltage (V)
Current (mA)
FIRE CONTROL
PANEL
R
L.R.
E.O.L.
L2L
R
L2
L
L1 L1
R
L2
L
L1
Recycling information
Customers are recommended to dispose of their used equipments (panels, detectors, sirens, and other devices) i n an environme ntally sound manner. Pot ential me thods include reuse of parts or whole products and recycling of p roducts, co mponen ts,
and/or materials.
Waste Electrical and Electronic Equipment (WEEE) Directive
In the European Union, this label indicates that this product should NOT be disposed of with household waste. It should be deposited at an appropriate facility
to enable recovery and recycling.
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