Reflective
Optical Beam Smoke Detector
User Guide
1. Installation
IMPORTANT NOTE: The infrared beam path MUST be kept clear of obstructions at
all times! Failure to comply may result in the system initiating a Fire or Fault signal
Detector installation must comply with local regulations. UL listed products must comply
with NFPA72
Ensure clear line of sight between Detector and Reflector – it is recommended at least
0.5m radius of clear space be maintained around the centre of the beam path
Mount securely to solid structural surfaces
Position beam as high as possible, but with a minimum distance of 0.5m from Detector to
ceiling. For installations complying with UL268/NFPA72, the maximum distance of
Detector and Reflector from the ceiling must be 10% of the distance between floor and
ceiling
Mount Detector and Reflector directly opposite each other
Do NOT position Detector where personnel or objects can enter beam path
Do NOT position two Detectors facing each other
Do NOT install the Detector or Reflector in environments where condensation or icing are
likely to occur
For ranges between 5m and 50m, use a 50m Detector with 1 Reflector.
For ranges between 50m and 100m, use a 100m Detector with 4 Reflectors.
2. User Configuration Settings
Access to the configuration settings is through the back plate of the Detector Head. Factory
default configuration settings are marked .
Dip switch
Function 1 2 3 4
Auto Reset Fire Relay (5 seconds) ON
Latching Fire Relay OFF
Fire Relay Enable, On Compensation Limit OFF
Fire Relay Disable, On Compensation Limit
50% Threshold OFF OFF
35% Threshold OFF ON
25% Threshold ON OFF
12% Threshold (Use for extreme sensitivity
requirements)
The Detector is set to Latching Mode or Auto Reset Mode using DIP Switch 1. If in Auto
Reset Mode, the Detector will automatically recover from a Fire state when the fire
condition has been removed. If in Latching Mode, it will remain in Fire state until either the
Detector is placed in Prism Targeting Mode or Alignment Mode, then back to Operating
Mode, OR power is removed from the Detector for 10 seconds.
Fire Relay Enable/Disable on Compensation Limit is set with DIP Switch 2. This mode
selects whether Fire activation is still enabled during an AGC Compensation Fault.
The Sensitivity of the Detector is set using DIP Switches 3 and 4.
Do not use the 12% or 25% Alarm threshold for UL listed 100m Detectors, as this will not
conform to UL268
ON
ON ON
3. Wiring Diagram
For connection of a single conventional Detector to a zone:
Fire Relay
Trouble Relay
10.2 to 30 Volts DC (RED)
Detector
0V (BLACK)
NO (YELLOW)
COM (BLUE)
COM (WHITE)
NC (GREEN)
PSU
Note 1 – This component is the Fire Resistor, and its value is specified by the Fire Control
Panel Manufacturer. For US installations it is typically a short circuit.
EOL – End of Line component – supplied by the Fire Control Panel manufacturer
For Analogue Addressable variants:
Fire Panel
Connections
ZONE WIRING
See note 1
EOL
Detector
Loop Output
Address switches Unused
Input to
Next Unit
In Line
For connection of multiple conventional Detectors to a zone:
Fire Relay
Trouble Relay
Detector
PSU
10.2 to 30 Volts DC (RED)
0V (BLACK)
NO (YELLOW)
COM (BLUE)
COM (WHITE)
NC (GREEN)
ZONE WIRING
See note 1
See note 2
Fire Relay
Trouble Relay
Detector
10.2 to 30 Volts DC (RED)
0V (BLACK)
NO (YELLOW)
COM (BLUE)
COM (WHITE)
NC (GREEN)
See note 1
EOL
Note 1 – This component is the Fire Resistor, and its value is specified by the Fire Control
Panel Manufacturer. For US installations it is typically a short circuit.
Note2 – Schottky Diode (60Volt, 1 Amp typical; must be UL listed for installations meeting
NFPA72)
EOL – End of Line component – supplied by the Fire Control Panel manufacturer
4. Prism Targeting Mode
Apply power to the Detector. After 5 seconds the RED LED will flash once to indicate that the
model is a 50m detector, or twice to indicate a 100m detector.
The Detector operating mode is selected
using the Mode Switch, situated on the rear
of the unit. It can be accessed by sliding a
finger between the body of the unit and the
wall.
Do NOT remove the detector from the
wall when accessing the Mode Switch
Select Prism Targeting Mode by moving the Mode Switch to the upper position.
Find the prism by adjusting the horizontal and vertical thumbwheels until the AMBER LED is
continuously ON. The AMBER LED will be OFF when no signal is being received, then will
flash at an incrementing rate to determine the target position. The faster the flash the nearer
you are to the target (prism).
At this point it is essential to test that the prism and not another surface is reflecting
the beam. Cover the prism with a non-reflective material and confirm that the AMBER LED
turns OFF.
5. Alignment Mode
Select Alignment Mode by moving Mode Switch to the middle position. The Detector will
automatically adjust its infrared beam power and receiver sensitivity to give an optimum
receiver signal strength. The progress of this is indicated by the LEDs on the front of the
detector:
CONTINUOUSLY AMBER : The Detector is not receiving a signal. Go back to prism
targeting mode.
FLASHING RED : The Detector is receiving too much signal and is attempting to reduce
the infrared power output to compensate. Wait at this point until the LED is OFF, this may
take up to 20 seconds depending on the distance between Detector and Prism, the
shorter the distance the longer the time.
FLASHING AMBER : The Detector is receiving a weak signal and is attempting to
increase the infrared power output.
OFF : The Detector has optimised the infrared power and receiver gain for the current
orientation of the Detector and Prism. This does not mean that the Detector to Prism
alignment is at its optimum, i.e. if the power is too high, a misaligned Detector may be
receiving a fringe reflection from another object.
FLICKERING RED/AMBER : This state can occur sometimes. It means that the infrared
power is stepping through the optimum setting.
Continue to flow
diagram for procedure.
Alignment Process Flow Diagram:
Return to Prism
Targeting Mode
Constant
AMBER
Amber
Reverse the
direction of the
thumbwheel
Repeat the
process for the
other
thumbwheel
Select alignment mode AMBER
LED will illuminate for
5 seconds
Wait until both LED’s stop
flashing (up to 30 seconds)
Slowly adjust a thumbwheel in
one direction and observe the
LEDs
LED
Red
flashing?
No
For optimum alignment,
deflection of the beam in all
four planes should cause
the Amber LED to flash first
Both
thumbwheels
adjusted?
Yes
Exit Alignment
Mode and enter
Operating Mode
Stop turning the
thumbwheel and wait
for the Red LED to
stop flashing
Slowly turn the
thumbwheel in the
same direction
LED
flashing?
Neither
Stop turning the
thumbwheel
Red Amber
6. Operating Mode
Select Operating Mode by moving the Mode Switch to its lower position.
On exiting alignment mode the Detector will perform an internal calibration check. Do not
block the beam whilst this internal calibration takes place. The Amber LED will flash
once a second, for up to sixty seconds, and then go out. If this fails, which would be due to
bad alignment or either electrical/optical noise, the detector will indicate a Fault condition. In
this case the alignment procedure must be repeated.
If the internal calibration check completes satisfactory, the Detector will now be in normal
operating mode.
7. System Testing
After successful installation and alignment the System will require testing for both alarm and
fault conditions.
Fault (Trouble) Test
Using a non-reflective object, quickly cover the entire prism(s). The Detector will indicate a
fault within 10 seconds by activating the FAULT LED and operating the Fault Relay.
The fault condition will automatically reset when the obstruction is removed.
Alarm (Smoke) Test
Taking note of the threshold selected during installation, select obscuration mark on filter to
correspond with the Detector Alarm threshold (see fig. 3).
Place the filter over the receiver optics (Top of Detector Head opposite end to the status
indication LED’s) at the correct obscuration value determined by the threshold selected. For
example, if a threshold of 35% has been selected position the filter just past the 35%
obscuration value on the filter (see fig 3.). Take care not to cover the transmitter optics.
Align filter for correct obscuration/threshold setting
Obscuration value
Receiver Optics
Fig. 3.
Transmitter Optics
Alignment/Status
Indication LED’s
8. Servicing and Maintenance
During Operating Mode, the following states will be indicated:
Normal (no Fault or Fire) – Amber LED will flash every 10 seconds (EN approved model)
or not flash at all (UL approved model)
Fire/Alarm – Red LED will be on continuously, and Fire Relay will close
Fault – Amber LED on continuously, and Fault Relay will open
Compensation Fault – Amber LED flashes every 2 seconds
A Compensation Fault will occur when the Detector can no longer compensate for signal
loss due to dust/dirt build-up on the lenses and/or Reflector. A Compensation Fault can be
cleared by cleaning the Reflector and Detector lenses using a dry lint-free cloth, and then realigning the beam. Compensation Faults can be avoided by periodic cleaning of the Reflector
and Detector before compensation limit is reached.
9. Technical Data
Operating Range (50 metre Detector) 5 to 50 metres
Operating Range (100 metre Detector) 50 to 100 metres
Supply Voltage limits 10.2Vdc to 30Vdc
Quiescent Current (no LED’s illuminated) <4mA
Alarm/Fault Current <15 mA
Power Down Reset Time 10 seconds
Operating Temperature (EN) -10C to 55C
Operating Temperature (UL) 32F to 100F
Relative Humidity 93% (non-condensing)
Tolerance to Beam Misalignment at 35% Detector 1.0, Prism 5.0
Fire Alarm Thresholds 2.50dB (25%), 3.74dB (35%), 6.02dB (50%)
Optical Wavelength 880nm
Head Maximum Size Width 130mm, Height 210mm, Depth 120mm
Weight 770 gms
IP rating IP50
22318.18.06-EN
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