GST D-9105RExd User manual

D-9105RExd
Digital Flame Proof Reflective Beam Detector
Installation and Operation Manual The Intelligent Solution
CONTENTS
I Overview ........................................................................................1
II Features.........................................................................................1
III Technical Specifications.................................................................2
IV Structure and Operation Principle..................................................4
V Mounting and Wiring...................................................................... 5
VI Commission .................................................................................13
VII Operation .....................................................................................15
VIII Troubleshooting ........................................................................... 17
IX Maintenance.................................................................................19
X Caution.........................................................................................19
XI Accessories..................................................................................20

D-9105RExd
Digital Flame Proof Reflective Beam Detector
Installation and Operation Manual The Intelligent Solution
1
I Overview
D-9105RExd Digital Flame Proof Reflective Beam Detector is able to
output signal in two ways: loop output and contact output. When the
detector is connected with GST fire alarm control panel, information
between the detector and the control panel is transmitted through the
detection loop. The detector address can be programmed ranging from
1 to 242 using GST programmer. When the detector is not connected
with the control panel, fire and fault information can be transmitted
through contacts.
The detector must be used together with a reflector. The number of
reflector(s) to be used (one or four) depends on the distance from the
detector.
With excellent built-in microprocessor, the detector has strong ability of
analysis and judgment.The detector can carry out system commission,
compensation of environmental variation, and judgment of fire and fault
through fixed algorithm. Digital bus technology ensures quick and
complete information transmission. With new and reasonable design,
flexible judgment and precise alignment, it’s aesthetically pleasing and
easy to install and adjust. Its sensitivity can be set with hand held
programmer in field, decreasing the demand for cleanliness of field
conditions, and enlarging application areas.
The detector is applicable to either commercial areas or hazardous
industrial areas, such as Zone 1 and 2 of explosive gas areasand Zone
21 and 22 of combustible dust areas.
II Features
1. Wide operating voltage range, large monitoring areas.
2. Combination of transmitter and receiver ensures easy installation
and accurate optical pathway.

D-9105RExd
Digital Flame Proof Reflective Beam Detector
Installation and Operation Manual The Intelligent Solution
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3. Built-in microprocessor enables intelligent judgment of fire alarm
and fault.
4. The detector can calibrate automatically, which ensures one
person to complete adjustment in short time. It’s also convenient to
operate.
5. Self-diagnosis function can monitor fault with itself.
6. Automatic compensation for factors weakening received signals,
such as a certain amount of dust contamination, positional
excursion and ageing transmitter.
7. Compatible to digital bus protocol, easy to control and operate.
8. Electronically addressed. The address can be programmed in field.
9. Two sensitivity levels can be set in field.
10. The detector’s optical pathway is designed with strong
anti-interference ability.
11. SMT processing technology.
12. Attractive and decent appearance.
III Technical Specifications
1. Operating Voltage:Power supply voltage 15VDC~28VDC
Loop voltage 15V~28V
2. Operating Current:
Power current: Commission current ≤20mA
Standby current≤12mA
Alarm current ≤22mA
Loop current≤2mA
3. Fire, fault contact output:
Fire relay: contact capacity is 28V/2A. Normally open in normal
state, closed in fire condition.
Fault relay: contact capacity is 28V/2A. Normally open in normal
state, and closed in fault condition.

D-9105RExd
Digital Flame Proof Reflective Beam Detector
Installation and Operation Manual The Intelligent Solution
3
4. Adjustment Angle:Vertical ±30 degrees, horizontal ±45 degrees
5. Maximum angular misalignment: ±0.5°
6. Sensitivity Level:
Level 1: high sensitivity
Level 2: low sensitivity
7. Indication of Detector State:
Commission: Green LEDand yellow LED illuminatesor flashes in
a certain way. Refer to Section VI Commission for details.
Normal monitoring state: Red LED flashes periodically.
Fire: Red LED illuminates and fire output contact is closed when
the detector reports fire alarm.The fire signal can be transmitted to
the control panel through loop and has to be cleared by the control
panel. If it’s not connected with GST fire alarm control panel, the
fire signal has to be cleared by rebooting.
Fault: Yellow LED illuminates. The detector clears the fault signal
automatically if thefault condition disappears.
Optical pathway is obscured totally:the detector first gives fault
signal,turns on yellow LED and closes faultrelay.20 secondslater,
it reports fire alarm, turns on red LED and closes fire relay. Yellow
LED is turned off, fault relay is disconnected.Note: In this case, it
does not necessarily mean there is a fire. After the
obscuration is removed, the detector clears the fault signal
automatically.
8. Operating Environment:
Temperature: -20C～+40C
Relative Humidity≤95%, non condensing
9. Monitoring Area: Maximum monitoring area: 14×100＝1400m2
Maximum width: 14m
10. Length of Optical Pathway: 8m～100m
11. Ingress Protection Rating: IP66
12. Dimensions:

D-9105RExd
Digital Flame Proof Reflective Beam Detector
Installation and Operation Manual The Intelligent Solution
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Length: 344mm
Width: 240mm
Depth:212mm(with adjustment frame)
13. Material and Color of Enclosure: Stainless steel, metallic gray
14. Weight: Detector: 6kg Adjustment frame: 3.8kg
15. Mounting Hole Spacing:
Spacing for embedding: 70mm x 50mm
16. Explosion-proof mark: ExdIICT6/DIPA21TA,T6
IV Structure and Operation Principle
1. Appearance of the detector is shown in Fig. 1.
Fig. 1
2. Operation Principle
The detector and reflector are placed oppositely. The detector includes
a transmitter and a receiver. Infrared beam of certainintensity sent out
from the transmitter is reflected bythe right-angle prisms of the reflector,
and then received by the receiver. The receiversimultaneously collects
and amplifies the returned infrared beam, analyze and judge the
Adjustment
Frame
Screw Receiving
Window
Transmitting
Window
Detector
Wiring Hole
LED
Screw

D-9105RExd
Digital Flame Proof Reflective Beam Detector
Installation and Operation Manual The Intelligent Solution
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collected signals through its microprocessor. When the detector is in
normal monitoring state, the intensity of infrared beam received by the
receiver is steady at a certain level. When smoke particles enter the
detecting area, the intensity of infrared light reaching the receiver falls
owing to light scattering. When the smoke particles reach a certain
density, and the intensity of infrared light received is reduced below the
preset threshold value, thedetector alarms fire and illuminates red LED.
The fire signal will be transmitted to fire alarm control panel connected
with the detector. Operation principle is shown in Fig. 2.
Fig. 2
V Mounting and Wiring
1. Ambient Conditions for Installation
The detector works on light obscuration principle, so any fixed or
moving obscuration in its optical pathway must be avoided when
locating it.
The wall for mounting either the detector or the reflector should be firm
and smooth. The detector is mounted vertical to the wall. The wall may
seem to be smooth, but corrugated or uneven, or may be changed by
the environment (in rainy season or in winter) and the installer should

D-9105RExd
Digital Flame Proof Reflective Beam Detector
Installation and Operation Manual The Intelligent Solution
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ensure the detector not affected by these factors. If the detector is
installed on sustaining rack similar to metal tube, make sure the
sustaining rack is installed firmly.
Not Fit For Locations where:
The height of the roof is over 40m.
There is no roof at all.
The space is lower than 1.5m.
There are a lot of dust, powder or vapor.
It is clean normally, but can be dusty in some special cases.
Temperature is high. Note: Temperature at top part of a
workshop with transparent roof may be over 50℃when
there is sunshine.
There is no access for maintenance.
The Mounting wall or fitting is greatly affected by mechanical
vibration.
There are fixed or moving objects within 1m from the
detector’s optical pathway.
There is strong magnetic field.
2. Mounting Height and Position
The mounting height of the detector and reflector should be most
accessible by smoke into beam zone. The following recommendations
are for reference:
(1) When space height is not over 5m, the detector and reflector should
be mounted on the two facing walls 0.5m from the ceiling, as shown
in Fig. 3.

D-9105RExd
Digital Flame Proof Reflective Beam Detector
Installation and Operation Manual The Intelligent Solution
7
Reflector
Detector
4.5m
5m
Fig. 3
(2) When space height is between 5m and 8m, the detector and
reflector should be mounted on the two facing walls 0.5m to 1m from
the ceiling, as shown in Fig. 4.
Reflector
Detector
7m
6m
Fig. 4
(3) When space height is more than 8m, the roof is normally gabled
without ceiling, the detector and reflector should be mounted on the
two facing walls about 8m from the floor, ensuring that the vertical

D-9105RExd
Digital Flame Proof Reflective Beam Detector
Installation and Operation Manual The Intelligent Solution
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distancebetween the detector/reflector and top of the building is not
less than 0.5m, as shown in Fig. 5.
Reflector Reflector
Detector Detector
12m
8m
Fig. 5
(4) For gable structure with space height about 8m, the detector and
reflector should be mounted on the two facing walls 1.5m from the
gabled girder, as shown in Fig. 6.
Detector Detector Detector
Reflector Reflector Reflector
6.5m
8m
Fig. 6
(5) If the surroundings are glass or transparent plastic, please place the
detector on the south wall in a building. If the detector cannot be