Firefly Omniguard 660 Series Service manual

660/860 SERIES OPTICAL
FLAME DETECTORS
Installation and operating
service manual
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Table of contents
Description ...........................................................................3
Theory of operation ...................................................................4
Specications .........................................................................4
Applications ..........................................................................5
Installation............................................................................6
Electronics ............................................................................6
Maintenance and troubleshooting................................................... 10
Service and Repair .................................................................. 12
Warranty............................................................................ 12
Wiring Diagram ..................................................................... 12
Ordering information/ Part Number Key ............................................. 13
CAUTION!
Electrostatic Discharge:
A discharge of static electricity from an ungrounded source, including the human body,
may damage the electronic circuitry of the Omniguard® Series 660 and 860 Flame
Detectors. Use one or more of the following methods when handling or installing
electrostatic sensitive parts:
• A wrist strap connected by a ground cord to an earth ground source
• Heel straps, toe straps, or boot straps at standing workstations
• Conductive eld service tools
• A portable eld service kit with a static-dissipating work mat
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Description
The Omniguard® 660 and 860 Series Flame Detectors are optically
based, self-contained, microprocessor controlled, ultraviolet/infrared
(UV/IR) and high-speed ultraviolet (UV) ame detectors. The 860 Flame
Detector utilizes the patented Fire Event Analysis (FEA)™ discrimination
technology. These Flame Detectors are compatible with most alarm
panels without the need for a controller. All electronics are housed
within a copper-free aluminum, high temperature, TGIC-Polyester
coated enclosure with a 3/4-14NPT or M20-1.5 conduit entry.
A stainless steel enclosure is also available.
The 660 and 860 Series Flame Detectors are suitable for use in Class
I, Division 1, Groups B, C and D (explosion-proof) areas and Class II,
Division 1, Groups E, F, and G (dust-ignition-proof) areas or
ll 2 G/D Exd llB + H2.T5 or T4 for gas,
Ex tb IIIC T100°C or T135°C Db for dust.
The housings are Type 4X or lP66, dust-tight and watertight. The
detectors are approved for both indoor and outdoor installations.
Standard Features (All Models)
• Microprocessor Based.
• User adjustable time delays.
• User adjustable latching or non-latching re relays.
• User adjustable sensitivity.
• User adjustable NO or NC relay outputs.
• LED indication: re (red), fault (amber).
• Transient voltage (surge) protection.
• RS485 addressable user interface.
• Terminal block accepts 22 to 12 AWG wire.
Standard Features (Industrial Models)
• 0 to 20 mA output.
• Relay contacts rated at 2 Amps @ 30 VDC (Resistive).
• Operating Temperature: -40°F to 185°F (-40°C to 85°C).
• Storage Temperature: -85°F to 212°F (-65°C to 100°C).
Standard Features (High Temp. Model)
• Relay contacts rated at 4 Amps @ 30 VDC (Resistive).
• Operating Temperature: -40°F to 257°F (-40°C to 125°C).
Storage Temperature: -85°F to 302°F (-65°C to 150°C).
Optional Features (All Models)
• Stainless Steel Housing (explosion-proof).
Approval:
• FM
• SIL 2
• CSA
• Russian Fire Certicate
• IECEx
• ATEX
• EMC
• LVD
• CSFM
Fire Detection Performance (All Models)
• 50 millisecond response to a saturating signal.
• One second typical to a 1 ft. by 1 ft. gasoline and N-heptane re at
50 feet.
• Two seconds or less to a 2 ft. x 2 ft. re of JP-4, JP-8, Jet A, Jet B,
AVTUR or AVGAS at 100 feet.
• Three seconds or less to a 10 ft. x 10 ft. re of JP-4, JP-8, Jet A, Jet B,
AVTUR or AVGAS at 250 feet.
• 120 degree horizontal eld-of-view (Figure 1).
• 80 degree vertical eld-of-view. (Figure 2).
Fire Detection Performance (Model 860-1XXXX)
• 340 milliseconds or less to a silane ame from a 1.10 inch orice at
30 feet.
• 2.9 seconds or less to an 8 inch diameter hydrazine re at 60 feet.
• 3.0 seconds or less to a hydrogen ame from a 0.75 inch diameter
orice with a ow rate of 1.5 SCFM at 35 feet.
Response Time (Model 660 High Speed Setting)
• 15 milliseconds to a saturating UV source.
Note: Detector response times and distances can be inuenced
by wind, smoke and viewing angle. Consult Firey AB application
engineers for specic details.
(Fig 1) 660/860 horizontal eld of view (Fig 2) 660/860 vertical eld of view
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Theory of operation
The Model 860 ame detectors
The Model 860 ame detectors are multi-spectrum detectors, which
provide a high degree of discrimination by sensing widely separated
ame emission spectra, both of which are found in hydrocarbon
and certain specied non-hydrocarbon res. Sophisticated signal
processing is accomplished by microprocessor technology. Automatic
self-testing of the electronics, sensors and optical surfaces is
accomplished using light guides. The light guides direct radiant energy
by a calibrated internal source lamp to the sensors, whereby it can be
determined if the detector’s windows have been contaminated to the
point that would render it blind to res. This self-interrogation is done
a minimum of four times per hour, thus providing the ultimate in re
detection reliability.
The two spectral regions selected for sensing re signals are the
Ultraviolet (UV) and Infrared (IR). The UV sensor is the stable, highly
reliable UV photon sensor tube which has a peak response centered
around 0.22 microns. The design of the tube is optimized for the
highest sensitivity to the UV radiation emitted by a ame with the
lowest response to background radiation such as near UV, black light,
visible light, sunlight and blackbody radiation, thereby providing a
very high signal-to-noise ratio.
The IR sensor is responsive to 4.4 microns. This Spectral frequency
is always present in a hydrocarbon re due to the excitation of hot
carbon dioxide molecules.
Additionally the option is available in which the IR sensor is responsive
to 2.9 microns as well as 4.4 microns. This option enables the detector
to sense certain non-hydrocarbon res. The detector’s autonull feature
eliminates interference due to background radiation in these regions
of the spectrum.
The Model 860 ame detector not only requires the coexistence of
UV and IR radiation, but also their presence in specic ratios. The ratio
must conform to the radiation pattern of specic res (see Figure 3).
This patented Fire Event Analysis (FEA) ensures the highest possible
discrimination between re and non-re sources.
The Model 660 ame detectors
The Model 660 ame detectors are single spectrum detectors utilizing
the same ultraviolet sensor tube as described for the Model 860 ame
detector.
The Model 660 ame detector requires only that a signal within the
detection envelope of the UV sensor will be present in a pre-dened
strength for a specied time duration. These parameters are user
adjustable and will determine the sensitivity and response time to all
res.
NOTE: Reference Figure 3 for appropriate sensor wavelength regions
to be used in Zeta calculation per NFPA 72 edition 2002 or later.
(Fig 3) typical hydrocarbon re spectrum
Specications
Environmental (All Models)
• Suitable for use in hazardous locations:
Class I, Division 1, Groups B, C & D
Class II, Division 1, Groups E, F & G
Type 4X rated.
• European Rating -
ll 2 G/D
Exd llB + H2 T5 Gb for gas (Industrial)
Ex tb IIIC T100°C Db IP66 for dust
Exd llB + H2T4 Gb for gas (High-Temp)
Ex tb IIIC T135°C Db IP66 for dust
Electrical Interface
• Nominal voltage input —24VDC (20 Min/32 Max).
• Maximum allowable ripple voltage — 240mV
• Current Draw (@ 24 VDC):
Model Standby Alarm Manual
Test
Auto
Test
860/660-XX0XX 90 mA 110 mA n/a n/a
860/660-XX1XX 90 mA 110 mA 250 mA 250 mA
• Relay Contact rating (860/660 Industrial Models) 2 Amps @ 30 VDC
(Resistive)
Relay Contact rating (660 High Temperature Model) 4 Amps @ 30
VDC (Resistive)
Note: Each detector contains two relays: (1) Fire, (1) Fault
• Current Loop Output (0 to 20 mA) - Industrial Temperature Models
Only (see Table 2)
• RS485 Half-duplex, Addressable, User Interface Baud Rate 9600 bits
per second
1 start bit, 8 data bits and 1 stop bit
• Power consumption (@ 24 VDC)
Model Standby Alarm Manual
Test
Auto
Test
860/660-XX0XX 2.16 W 2.64 W n/a n/a
860/660-XX1XX 2.16 W 2.64 W 6 W 6 W
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Mechanical Specications
(Figure 3 Shows Nominal Dimensions)
Length: 6,0 inches (153 mm)
Height: 4.5 inches (114 mm)
Width: 5.5 inches (140 mm)
Weights: (installed)
Aluminum Housing 5.0 lbs (2.4 kg)
Stainless Steel 13 lbs (6.3 kg)
Shipping weight:
Aluminum Housing 6 lbs (2.8 kg)
Stainless Steel 14 lbs (6.7 kg)
Optional Accessories
Swivel Mount - No 20856 (1) (Used with aluminum enclosure)
No 70991(2) (Used with stainless steel enclosure)
Air Shield Kit - 8001023
Rain Shield - 23546
Portable test unit - Model 540 / 545
(Fig 4) 660/860 mechanical specications
Applications
The Model 660 and 860 ame detectors are designed for re detection
applications where sudden res from hydrocarbon fuels or when
proper options are selected, from specied non-hydrocarbon fuels,
may occur. These detectors are not recommended for smoldering or
electrical re hazards.
The following is a partial list of fuels which emit ultraviolet and infrared
radiation. Response time and detection distances vary. Consult Firey
AB applications engineers for specic details:
Hydraulic uid, Methyl-Ethyl-Ketone, wood products, jet fuels,
Methane, Kerosene, Propane, plastics, gasoline, Propylene, Acetone,
fuel oil, Acetylene, Methyl alcohol, Ethyl alcohol, Isopropyl alcohol,
Heptane, Toluene, Epoxy powders, crude oil, Butane, Hydrogen,
Hydrazine, Silane, N-heptane.
The rugged, weatherproof construction and the operating
temperature range of the detectors will accommodate a variety of
indoor and outdoor applications.
All installations should comply with local re codes and regulations.
Do not proceed with the installation if you do not understand the
installation procedure or operation of the detectors. Firey AB
applications engineers are available to assist you.
(Fig 5) Swivel Mount installation
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Installation
To ensure trouble-free operation and reliable re protection, follow
these installation guidelines:
1. Locate the detector(s) in an area where they will have an
unobstructed view of the area to be protected and where extraneous
sources of ultraviolet radiation will not aect the performance of the
re detectors. These sources include but are not limited to, nuclear
radiation, x-rays, electrical corona, unshielded quartz halogen lamps,
and open ame sources such as gas red heating equipment and
process burn o stacks. Prolonged exposure to a continuous source
of UV radiation will diminish false alarm discrimination. The detectors
must be accessible for cleaning. Failure to maintain clean sensor
windows, and self-test optics when so equipped, will impair the
performance of the detector. For compliance of an ATEX requirement,
ensure that there are no hazards in the area that could provide shocks
of energy to the windows greater than 2.0 J.
2. Separate the base from the housing by removing the four M8 x
1.25 cap screws. This will require a 6mm hex key. Store the housing
assembly, containing the electronics, in a clean and dry environment,
while installing the base.
3. Mount the detector base to a previously installed swivel mount
or other appropriate support structure so that the detector has an
unobstructed view of the area to be protected. Position the base such
that the conduit opening faces down. It will be necessary to seal the
conduit within 18 inches of the re detector enclosure. This will insure
that water and airborne moisture do not enter the detector housing
through the conduit. Provide conduit drains as necessary to prevent
moisture from collecting inside the conduit.
4. Determine the critical areas where res are most likely to occur. Use
these areas as focal points for aiming the detectors. The detectors have
a conical eld-of-vision as shown earlier in Figures 1 and 2. The type of
fuel and the size of the re will determine the range of detection.
Aim the detector at a point equal to or below horizontal, so that
water, dust and dirt will not accumulate on the optical surfaces of the
detector. As a general rule, mount the detector so that it will view the
base of the area to be protected.
5. Complete the installation by wiring the detector according to the
wiring diagram located inside the rear cover. Before assembling the
detector housing to the base, verify that the terminal block assembly
is plugged in all the way and is located at the top. Insure that the wires
are arranged so as not to interfere with the main electronics module.
If a Torque wrench is available, it is recommended that the four cap
screws be tightened to a value of 35 to 40 in-lbs. (3.95 to 4.52 NM).
Note: The electronics module contains no re-useable parts. It should
never be removed from the housing assembly. This will result in the
voiding of the warranty.
6. Use a 20 to 32 Vdc regulated and ltered power supply, with a ripple
not exceeding 1 percent. The detectors should be protected from
induced and transient voltages as well as radio frequency interference
(RFI). To ensure compliance to CE requirements, a dedicated conduit is
highly recommended for the detector wiring. Connect every detector
housing to earth ground via an independent wire. In order to meet
EN 6100-4:1996 Conducted RF Immunity, 150 KHz-100 MHz, 80% AM
1 KHz Pulse, 10 VRMS requires a Corcom lter 15DCB6F or equivalent
connected to power lines.
Electronics
User Selectable Factory Settings
The electronic module has been factory congured to provide the user
with the following:
Time Delay: (660/860) 3 Seconds (re),
(860) 35 Seconds (UV or IR warning)
Sensitivity: (860) Fire Event Analysis Level I, Industrial.
(660) Level 2, Normal
Relays: Fire Normally Open, Latching.
Fault Normally Open, (Relay is failsafe, it closes upon
application of power to detector), non-latching
(cleared after successful test).
Optical Self-Test: Automatic (Only Self-Test Models)
0 to 20 mA (660-0XXXX/860-XXXXX) “OFF”
RS485 (660/860) “OFF” — HI-Z mode
UV or IR Time
Delay
Fire Time
Delay
C31 C30
98654321 7
ON
1 2
3
1 2
3
1 12
1324
Jumpers
Configuration
Switches
Fuse
(Fig 6) 660-0xxxx and 860-xxxxx user selectable options locations
(Fig 7) 660-1xxxx user selectable options locations
SPST dip switch (s1) located on board p/n 71043
Option O On
Automatic & Manual Test Activated 1, 2
No Test Feature 1, 2
Manual Test Only 2 1
Automatic Test Only* 1 2
Industrial Applications* 3
Aircraft Hangar Applications 3
Fire Event Analysis Level I* 4
Fire Event Analysis Level II 4
IR/UV Alarm 5
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Option O On
No IR/UV Alarm* 5
Fire Output Latching* 6
Fire Output Non-latching 6
0 to 20 mA 7
No 0 to 20 mA* 7
RS485 UI 8
No RS485 UI* 8
Program 9
No Program* 9
*Denotes factory settings for auto test units only
(Fig 8) switch congurations for the 860-xxxxx UV/IR Flame detector
User Selectable Interface (USI) Options
(Refer to Figures 6 and 7 for Locations of User selectable Options.
Figures 8,9 and 10 provide the user with a quick reference of switch
setting options for the various models. The text following these
gures describes in more detail the function of each switch setting.
Fire Time Delay
Models 660-0XXXX and 860-XXXXX and Model 660- 1XXXX
The re outputs can be congured to delay for up to 25 seconds
before annunciation of a re. If the re were to extinguish anytime
prior to the end of the set delay time, the detector would not declare
a re. The factory setting for this delay time is 3 seconds. To adjust
the re delay time, use Potentiometer (Pot) R49. Turning the Pot
counterclockwise (CCW) will decrease the time delay. One turn equals
approximately 1.25 seconds.
Note: If the Model 660 is using the high speed option, then the
maximum delay time setting will be 400 milliseconds. Each turn of the
Pot will equal 20 milliseconds.
SPST dip switch (S1) located on board p/n 71043
Option O On
Automatic & Manual Test Activated 1, 2
No Test Feature 1, 2
Manual Test Only 2 1
Automatic Test Only* 1 2
Sensitivity — Level 1 3, 4
— Level 2 3 4
— Level 3 4 3
— Level 4 3, 4
Detection Speed — Normal Speed 5
— High Speed 5
Fire Output Latching* 6
Fire Output Non-latching 6
0 to 20 mA 7
No 0 to 20 mA* 7
RS485 UI 8
No RS485 UI* 8
Program 9
Option O On
No Program* 9
*Denotes factory settings for auto test units only
(Fig 9) switch congurations for the 660-0xxxx UV Flame detector
SPST dip switch (S1) located on board p/n 71044
Option O On
Automatic & Manual Test Activated 1, 2
No Test Feature 1, 2
Manual Test Only 2 1
Automatic Test Only* 1 2
Sensitivity — Level 1 3, 4
— Level 2 3 4
— Level 3 4 3
— Level 4 3, 4
Detection Speed — Normal Speed 5
— High Speed 5
Fire Output Latching* 6
Fire Output Non-latching 6
RS485 UI 7
No RS485 UI* 7
Program 8
No Program* 8
*Denotes factory settings for auto test units only
(Fig 10) switch congurations for the 660-1xxxx UV Flame detector
UV or IR Warning
—Model 860: Switch position 5 is used to enable the UV or IR Warning
Output. If switch position 5 is “ON”, this option is activated. If switch
position 5 is “OFF”, this option is not activated. This option will alert the
user to the presence of high levels of either UV or IR within the eld-
of-view of the re detector.
Note: The use of this option will eect the operation of the fault relay
only. Refer to the Maintenance and Troubleshooting Chapter (sections
labeled “Fault Condition”and“UV or IR Warning”) for additional
information on switch position 5.
UV or IR Time Delay
—Model 860: The UV or IR outputs can be congured to delay for up
to 63 seconds before annunciation of one of these emissions. If the
UV or IR signal disappeared prior to the end of the set time delay, then
the detector would not allow the outputs to toggle“ON”. The factory
setting is 35 seconds. To adjust the UV or IR time delay, use Pot R48.
Turning the Pot CCW will decrease the time delay. One turn equals
approximately ve seconds.
Note: Always reset power to the detector after adjusting the pots. The
detector will not recognize any new setting unless it is reset.
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Sensitivity Levels
—Model 660 (Table 1): Switch positions 3 and 4 adjust the sensitivity
to four dierent levels. Level 1 being the most sensitive to UV radiation
and the most susceptible to false alarms. Level 2 is the factory setting
and is recommended for most applications. The following are the logic
levels for the two switch positions:
Table 1 – Model 660 Sensitivity Settings
Sensitivity Level Position 3 Position 4
1 (Max) O O
2 O On
3 On O
4 (Min) On On
Detection Speed
—Model 660: Switch position 5 is used to select two detection speeds.
The normal speed utilizes a slower sampling rate and automatic self-
test interval. The high-speed setting increases the data sampling rate
and auto self-test frequency. Toggling switch position 5 “ON”activates
the normal speed option. Toggling switch position 5 “OFF”activates
the high-speed option. The normal speed option is the factory setting
and recommended for most applications.
Industrial or Aircraft Hangar Applications
—Model 860: Switch position 3 is used to select the application
setting. If the detector is to be installed in an industrial environment
(i.e., fuel loading rack, compressor building, tank farm), switch position
3 should be “ON”. If the application is for an aircraft hangar, switch
position 3 should be “OFF”. The false alarm immunity will be slightly
diminished from that of the industrial setting.
Fire Event Analysis Level I or II
—Model 860: Switch position 4 allows the detector to run the
Fire Event Analysis (FEA) program of your choice. FEA Level I is for
installations with normal UV background levels (i.e., no welding). FEA
Level II should be used where detectors are required to detect ames
while welding or other UV generating sources are present. Turning
switch 4 “ON”selects FEA Level I. Turning switch 4 “OFF” will provide
FEA Level II. Level II has slightly diminished false alarm immunity as
compared with Level I.
Relay Adjustments
—Models 660-0XXXX and 860-XXXXX and Model 660-1XXXX
There are two relays and Conguration Option Jumpers, JP1 and JP2,
located on the exposed surface of the printed circuit board (PCB) in the
housing assembly. Using these jumpers, the relays may be congured
as normally open or closed. The factory will ship the detectors with the
following settings.
1.) Fire relay (K2) — normally open:
-will close when there is a re present beyond the re time delay
setting.
-will close when manual test is activated beyond the length of
time for the re delay time setting.
Note: The red, light emitting diode (LED), will be illuminated when
relay closes.
2.) Fault relay (K1) - normally open:
- will close when power is applied (Model 860 after 2 seconds and
Model 660 less then a second).
- will open when power is lost (or fuse F1 on process PCB is open).
- will open when detector fails automatic test.
- will open when detector fails manual test.
- will open when SW7 is on and no loop is present.
Note: The amber LED will be illuminated when relay opens, unless
there is a loss of power.
Note: Any adjustments to the user options listed above should be
done with the power“OFF”. The detectors will not recognize any
changes until the microprocessor is reset. Removing the power allows
a reset to occur.
Caution: Upon applying power, insure that the detector remains on for
at least 5 seconds to allow for complete initialization to take place.
Fire Outputs Latching or Non-Latching
—Models 660 and 860, switch position 6 selects the latching or non-
latching Fire Outputs option. To select latching, the switch position 6
must be toggled “ON”. Upon detecting a re, the Fire Outputs signal
will remain engaged as long as power remains “ON” or until the
detector is reset through the RS485 User Interface (UI). If you select
non-latching by toggling switch position 6 to “OFF”, the Fire Outputs
signal will disengage after a re is extinguished.
Optical Self-Test
—Models 660-XX1XX and 860-XX1XX: These models have a “through-
the-lens” optical clarity-checking feature. The factory setting is for
automatic test only, switch position 1 is “OFF”, and switch position 2
is “ON”. (See Figure 5 and 6 for location of the switches and Figures
7, 8 and 9 that describe the switch settings for the user selectable
interface.) If the addition of the manual test feature is desired, then
toggle the switch position 1 to“ON”. If only the manual test feature is
needed, then toggle the switch position 1“ON”and switch position 2
“OFF”. If no optical testing is preferred, then ensure that both of these
switches are “OFF”.
Models 660-XX0XX and 860-XX0XX do not have either the manual or
the automatic test feature and do not test the lens for optical clarity.
Switch positions 1 and 2 are non-applicable (N/A) in these detectors.
0 to 20 mA Output
—Models 660-0XXXX and 860-XXXXX switch position 7 selects the 0
to 20 mA output option. If this output is utilized, then switch position
7 must be “ON”. Otherwise, if this output is not used, switch position 7
must be kept “OFF” or it will cause the Fault Outputs to turn “ON”. Table
2 illustrates the order of priority. For the Model 660-0XXXX, priority 2
and 3 is N/A.
Table 2 – Milliamp Logic Chart
Priority State Load Current mA
1 Fire 20 ± 0.2
2 Warning UV 16 ± 0.2
3 Warning IR 15 ± 0.2
4 Fire Relay Coil Fault 3 ± 0.2
5 Calibration not complete
EEPROM Corrupted Fault
2 ± 0.2
6 Self-Test Fault 1 ± 0.2
7 Current Loop Fault 0 ± 0.2
8 Normal 4 ± 0.2
RS485 User Interface (UI)
The Series 660 and 860 Flame Detectors are equipped with a two
wire, half-duplex, serial communication interface, which is called the
“User Interface” (UI). The RS485 UI will allow up to 31 detectors to
be networked to a controller (i.e., customized re panel or personal
computer). The controller will perform the buss arbiter duties,
because the network is in half-duplex mode. This means that only one
transmitter is allowed on the network at one time.
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Activating The RS485 Option
On models 660-0XXXX and 860-XXXXX, switch position 8 enables this
option when it is toggled to the“ON”position. It becomes disabled in
the “OFF” position. For model 660-1XXXX, switch position 7 performs
this task. This option provides the user with a half-duplex serial
communication network interface for up to 31 detectors. The RS485
UI has two methods for conguring the network. For either method,
the unit has to be programmed to a unique detector number from
01 through 31. The detector number will give the Flame Detector an
address on the network. For the rst method, the RS485 UI option is
“ON”. If any alarm state changes, the detector will send out an “Enquiry
Interrupt” (EI). The EI is the ASCII character “ENQ”, which is equal to the
number 5. Once a re detector starts to transmit the EI on the network,
it will lock out any other detector from sending out the EI. The detector
will continue to transmit the EI every second until the buss arbiter has
requested a status from it. For the second method, when the RS485 UI
option is “OFF”, the detector will be inhibited from sending the EI. The
network is still active, but the detectors will only transmit information
or perform a function when the buss arbiter interrogates them. For
both methods, the detector will wait for a minimum of 16 ms before it
will send a response to the buss arbiter. This delay time allows for the
buss arbiter to release the network from its transmit mode.
NOTE: To determine the proper conguration of the RS485 UI refer to
the rmware revision block on the nameplate, which is a stamped pad
located to the right of the model name. The pad will contain a letter
character to indicate the rmware revision level.
The detector provides the RS485 UI with a“Status Message”. After a
status request is made, the detector will send out for revision “A”a
one-byte word that represents the Status Message and starting with
revision “B” a six-byte response packet which the fourth byte contains
the status message. As shown in Table 3, the status message has seven
alarm bits and one valid transmission bit. When bits 0 through 6 are at
logic zero, the alarms are “OFF”. When bits 0 through 6 are at logic one,
the alarms are “ON”. Bit 7 is always“ON”. For revision “A”, it allows for
error checking during transmission. If a transmission occurs and bit 7 is
not set, then the transmission is not valid. Starting with revision “B”, if
bits 4 through 7 are set to logic one then the relay coil is open. If bit 3
through 7 are set to logic one then the non-volatile memory has been
corrupted.
Table 3 – Status Message for RS485 UI
Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0
Always
On
Manual
Test
Fault
Auto
Test IR
Fault
Auto
Test UV
Fault
Milli-
amp
Fault
IR
Warn-
ing
UV
Warn-
ing
Fire
Data commuication RS485
Starting with revision “B”, in order for the buss arbiter to interrogate
the network, it must send out a six-byte control packet to the network.
The packet formation is comprised of the byte denition shown in
Table 4. The rst byte is the protocol start value for the control packet.
The second byte represents the detector address high byte which is
the tens digit of the detector address. The third byte represents the
detector address low byte, which is the ones digit of the detector
address. The fourth byte is the secondary command. This is used to
control the detector. The fth byte is a spare and may be used in the
future. The last byte is the checksum of the control packet. This is
calculated by rst summing the previous ve bytes. Then taking the
total and performing a modulus 256. The result is the checksum.
Table 4 – Control Packet Denition for RS485 UI
Packet
Position
ASCII Byte Value Byte Denition
Byte 1 ‘K’ 75d 4Bh Protocol Start
Byte 2 ‘0’ to ‘3’ 48d to
51d
30h to
33h
Det. Addr. Hi-Byte
Byte 3 ‘0’ to ‘9’ 48d to
57d
30h to
39h
Det. Addr. Lo-Byte
Byte 4 ‘0’ 48d 30h No Sec. Command
Byte 4 ‘T’ 84d 54h Init. Manual Test
Byte 4 ‘R’ 82d 52h Unit Reset
Byte 5 ‘0’ 48d 30h Spare
Byte 6 checksum=(Sum bytes 1..5) mod 256
If the transmission byte packet is recognized as valid, then the detector
will recognize the secondary command byte and perform the function.
If the “No Secondary Command” is sent, the detector sends a response
packet containing the status message. The packet formation consists
of the byte denition shown in Table 5.
Table 5 – Response Packet Denition for RS485 UI
Packet
Position
ASCII Byte Value Byte Denition
Byte 1 ‘S’ 83d 53h Protocol Start
Byte 2 ‘0’ to ‘3’ 48d to
51d
30h to
33h
Det. Addr. Hi-Byte
Byte 3 ‘0’ to ‘9’ 48d to
57d
30h to
39h
Det. Addr. Lo-Byte
Byte 4 ‘NA’ 128d to
255d
80h to
FFh
Status Byte
Byte 4 ‘0’ 48d 30h Spare
Byte 4 ‘R’ 82d 52h Unit Reset
Byte 5 ‘0’ 48d 30h Spare
Byte 6 checksum=(Sum bytes 1..5) mod 256
To enable the “Manual Test Command”, turn switch 1 to the “ON”
position. In turn the detector test lamp is illuminated for a period of
time based on the customer selected re time delay. After the re
alarm is activated, the unit transmits the response packet indicating
the re alarm bit set and terminates the manual test. If a fault occurs,
then the detector transmits the response packet indicating the
manual test fault bit set and terminates manual test. If the“Unit Reset
Command” is provided, the unit sends the response packet indicating
the present status of the detector and performs a software reset.
An initialization period of 2.3 seconds during which the unit is non-
responsive to communication occurs after software resets or initial
application of power.
Note: All detectors in the network must be programmed to a valid
detector address number from 01 through 31. For Revision “A”, during
the time that detectors are being polled, they will be removed from
re detection mode. Therefore, this should be done only when
necessary and as quickly as possible.
Programming the Detector Address Number
on Models 660-0XXXX and 860-XXXXX, this option is activated when
switch position 9 is toggled“ON”. The option is deactivated when the
switch is in the “OFF” position. For Model 660-1XXXX, switch position 8
performs this task.
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10 ©Firey AB (Oktober 2016)
This option provides the user with a method of programming the
unit number into the non- volatile memory of the microprocessor.To
program the detector address number, rst remove power from the
detector. Then toggle the program option “ON” and set the rst ve
switches on the user selectable interface (USI) to the detector address
number.
In program mode, the USI becomes a binary programmer as illustrated
in Table 6. When a switch is toggled “ON”, it will equal the binary
weighted number. These binary weighted numbers are added
together when a multiple number of switches are switched“ON” (i.e.,
if SW2 and SW3 were closed, then the detector number would equal
a 6).
Table 6 Binary Weight for Switch States“ON”
SW1 SW2 SW3 SW4 SW5
1 24816
When power is applied to the detector. The detector will sense that
it is in program mode and read the rst ve switch positions. From
the switch setting, it will determine the detector number. Once the
number has been determined, the detector will enter it into the non-
volatile memory of the microprocessor. Next, the amber LED will ash
“ON”a certain number of times. The number of ashes will be equal
to the detector’s address number. Then it will hold the fault relay and
amber LED “ON” constantly for about 10 seconds. Then the detector
will repeat ashing the detector address number and the delay time. It
will continue this mode for up to 5 minutes.
Once you are sure that the proper number is programmed, then shut
the power“OFF”and set the USI options to suit your application.
Reference the section on the USI if you are not sure which option is
best for your application or call a Firey AB application engineer.
Note: In the case that the program option switch is left“ON”and the
detector is installed on the network. The detector will go through the
same process as explained previously, but after 5 minutes the detector
will resume the last USI setting that it had prior to going into the
program mode.
Maintenance and troubleshooting
Model 660 and 860 ame detectors are designed for years of
trouble-free operation with minimal attention. Periodic cleaning of
the optical surfaces is essential, however, for maintaining reliable re
protection. The frequency of required cleaning will be determined
by the environmental conditions in and around the installation. The
detectors should be regularly inspected for a build-up of dust or other
contaminants on the optical surfaces.
The detection specications presented in this manual are predicated
on performance with clean sensor windows. Contaminants such as
dust, oil and paint will reduce sensitivity. Severe contamination on the
light guides or sensor windows will cause a failure of the auto-test.
A detector that fails auto-test due to dirty optical surfaces may be
capable of detecting re, but its eectiveness will be limited from 50 to
70% obscuration.
Cleaning Procedure:
Locate the following optical surfaces: (Figure 11)
Models 660-XX1XX
1. UV Sensor Window
2. UV Light Guide End
Model 860-XX1XX
1. UV Sensor Window
2. UV Light Guide End
3. IR Sensor Window
4. IR Light Guide End
Note: Models 660-XX0XX and 860-XX0XX are not equipped with light
guides. Clean the optical surfaces with a cotton swab wetted with
commercial liquid glass cleaner, ammonia, methanol, or isopropyl
alcohol. Rinse with clean water and dry with lens quality cloth. Repeat
with methanol if needed to remove smudges.
Caution: Wiping with excessive force or inappropriate materials may
scratch the optical surfaces and impair performance.
Figure 11 – Optical surfaces
Troubleshooting:
*WARNING* Do not attempt to repair a detector. Study these
troubleshooting guidelines and review the referenced sections of the
manual prior to performing maintenance on the re detection system.
New Installations:
Starting with Revision E Software, when the detectors are in
operational mode, and amber LED will be visible for one second
approximately every ten seconds. If any or all the detectors fail to
operate, check the system wiring and power supply. Tight, reliable
wiring connections are essential, as are low-resistance connections
from every detector housing to earth ground. Measure the voltage
between terminals 8 and 10 at the detector locations to verify that the
supply voltage is within range.
Note: Voltage at detectors installed farthest from power source will be
lower than the no-load supply voltage due to line losses. Maximum
load condition occurs during manual test.
The Model 660 and 860 ame detectors employ sensitive and
sophisticated electronic circuitry in the re detection process. Power
line transients or excessive power supply ripple may therefore cause
erratic or intermittent operation. DC-powered detectors function best
with ripple-free (less than 1 percent) supply voltage; power supply
ltering may be necessary to improve performance.
Note: For reliable operation, the instantaneous supply voltage at the
input to any detector must not fall below 20 Vdc or exceed 32 Vdc.
Failure To Alarm:
Upon detection of re, the re outputs will activate and the red LED,
visible through the UV sensor window, will turn “ON”.
If during testing, a detector fails to alarm, inspect the sensor windows
for cleanliness. Clean sensor windows are essential for eective
optical re detection. Clean all the optical surfaces per the cleaning
procedures previously described and retest the detector.
Should the detector continue to be inoperative, check the supply
voltage and all associated wiring. Incorrect power supply voltage or
loose connections will cause marginal or intermittent performance.
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11©Firey AB (Oktober 2016)
Alarm Condition - No Fire Present:
A detector in alarm condition when no re is present may be caused
by an inadvertent actuation of the manual test. Except for Models
660-XX0XX and 860-XX0XX, the Model 660 and 860 ame detectors
feature manually initiated self-test of the optical and electronic
systems.
Verify the light guides are illuminated. If they are, then check
the manual test wiring and the test switch for broken, loose, or
intermittent connections. Repair or tighten any faulty connections.
If the light guides are not illuminated, then contact your Firey AB
representative.
Condence Condition:
Model 660 and 860 ame detectors are equipped with a fault relay to
annunciate a change in the operational status of the detector. When
power is applied to the detector, the fault relay will energize within 2
seconds. A loss of power will cause the relay to de-energize.
If the fault relay output fails to change state within 2 seconds after
power-up and the amber LED fails to illuminate, then there may be no
power reaching the detector’s electronic module. Check the supply
voltage, the condition of the fuse located at F1 on the PCB and the
wiring to terminals 8 and 10. Also, inspect the wiring to the fault relay
terminals 6 and 7 and the jumper JP1 that sets the fault relay option.
Note: Model 660-0XXXX and 860-XXXXX ame detectors are equipped
with a 0 to 20 mA option. A loss of power will result in a constant 0 mA
output.
If the fault relay output continues to be inoperative, isolate the relay
contacts by disconnecting the external wiring to the fault relay
terminals. Connect an Ohmmeter across the fault relay terminals and
monitor for an actuation of the relay. Repair the external wiring if
necessary.
Fault Condition:
Model 660-0XXXX and 860-XXXXX ame detectors are equipped with
a 0 to 20 mA output. When the 0 to 20 mA option is not used in your
application, make sure that the 0 to 20 mA option is“OFF”on the USI.
If the 0 to 20 mA option is “ON” and at any time the drive line opens or
the current sense does not equate to what is suppose to be there, it
will cause the activation of the fault outputs. Check the wire terminal
15 and insure that a good signal ground is present at terminal 10 or
11. To insure that the 0 to 20 mA option causes the fault condition,
toggle the option on the USI “OFF” and reset the detector by toggling
the power o then on. If the fault condition continues to be activated,
then the problem is in a dierent area.
Model 660-XX1XX and 860-XX1XX ame detectors are equipped with
automatic self-test in addition to the manual test. Approximately every
15 minutes the automatic self-test is actuated, and for a brief time
interval, the optics and electronics are checked for functionality.
The exception to this is for the high-speed setting on 660 models. In
this conguration (switch 5“OFF”), self-test is actuated approximately
every 2 minutes. A failure of the automatic self-test is annunciated
by the activation of the Fault Outputs. If a detector goes into a fault
condition, the optical surfaces should be checked for cleanliness. Clean
sensor windows and light guide ends are necessary for the detector(s)
to pass self-test.
After the optical surfaces have been inspected and cleaned, reset the
detector. If the detector is wired for manual test, perform the manual
test. The typical response time should be from 0.6 seconds beyond the
actual re output time delay.
*WARNING* During Manual Test, the re output will be actuated.
Always disable extinguishing circuits before testing.
If the detector continues to go into a fault condition following
a cleaning of the optical surfaces, check the supply voltage and
wiring at terminals 8 or 9 and 10 or 11. Look for loose or intermittent
connections.
During normal operation, the fault outputs will change state on
power-up. The output will return to its original state if power to the
detector is removed. If the fault output is intermittent or erratic, check
the supply voltage and wiring to terminals 8 or 9 and 10 or 11. Inspect
the fault relay wiring on the detectors. Repair or tighten any loose
connections.
For the Model 860, if the UV or IR option is“ON”, the fault relay will be
ashing at a 1 Hz rate whenever a fault conditions exists.
Manual Test Failure:
*WARNING* This test will activate the re outputs. Always disable
extinguishing circuits before testing.
A manual test is actuated by connecting the 660-XX1XX or 860-XX1XX
test circuit terminal 12 to the plus terminal of the detector’s input
power supply (terminal 8 or 9).
During manual test, the optical and electronic systems of a detector
are checked. Upon successful completion of the test, the re outputs
will be activated. Also, the red LED
inside the detector, visible through the UV window, will turn“ON”. The
typical response time is 0.6 seconds beyond the actual re output time
delay. If the detector fails to respond to a manual test, check to see if
the USI manual test option is “ON”(switch 1).
If the detector fails manual test by activating the fault outputs or the
response time is longer than expected, the optical surfaces of the
detector may require cleaning. Clean the sensor windows and light
guide ends. After cleaning, initiate the manual test.
If the detector again fails manual test, check the wiring to the supply
voltage terminals 8 or 9 and 10 or 11. The detector may not be
receiving enough power; the wiring connections may be loose or
intermittent. If the red LED is illuminated and there is no re output,
then check all the connections to the re alarm panel or annunciating
devices. A defective test switch may prevent the test circuit from
initializing. Initiate the manual test by connecting a wire from the test
switch terminals to the positive terminal of the input power supply.
Replace the switch if the manual test operates when the wire is
connected.
UV or IR Warning:
In addition to detecting re, the Model 860 ame detectors will
annunciate a warning of potentially hazardous conditions that could
cause a re. For example, welding, a process which emits a far greater
proportion of UV radiation than IR, will cause an actuation of the UV
or IR Outputs but not the Fire Outputs. For this detector to actuate
the Fire Outputs, it must sense the simultaneous presence of UV and
IR in a ratio characteristic of the re type(s) to which the detector is
congured.
When the detector senses persistent source of intense UV or IR
radiation, such as welding, sparks, or radiant heat, the UV or IR Outputs
will change state. To enable the UV or IR Outputs, the UV or IR option
(switch 5) must be “ON”. When the UV or IR Outputs are activated, it
will cause the fault relay to be“OFF”and the amber LED to be“ON”
constantly. If the 0 to 20 mA option is “ON”, it will set the output to 16
ma. The UV or IR warning are non-latching outputs and will change
states if the problem source is removed.
This alarm is used as a tool to help prevent unwanted alarms. An UV
or IR warning should always be investigated with caution. If possible,
remove the source of radiation, as a constant presence of UV may
reduce detector sensitivity and compromise its discrimination ability.
Inspect the protected area and beyond; UV from sources such as
welding can be sensed at great distances. If no radiation sources are
apparent, cover the detector with opaque material to test whether the
UV or IR warning disappears when the sensor windows are blocked.
Continue searching for the source of UV or IR, if necessary. If the
warning does not disappear after blocking the windows, a sensor may
be faulty and in need of repair.
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12 ©Firey AB (Oktober 2016)
RS485 User Interface (UI)
If no communication has been established, check the wiring to be sure
that the polarity is not reversed on the two wires. The network can
be daisy chained, but it does require two 120Ω terminating resistors
in order to minimize reections. One resistor should be placed at the
controller or buss arbiter. The other resistor should be placed at the
farthest location from the controller or buss arbiter. RS485 allows up to
4000 feet of 24 AWG twisted-pair wire driving into 120Ω loads.
Service and repair
Contact Firey AB or your Firey AB distributor for details on our
customer support and repair services. Prior to returning defective
material, please contact the Firey AB service and repair department
for additional procedural information.
Model 660 and 860 ame detectors are not eld-serviceable and the
ameproof joints are not intended to be repaired. An unauthorized
attempt to repair or re-calibrate a detector will void the warranty.
Detectors should be carefully packed to avoid damage from shock,
moisture and dust. Use the original shipping carton, if available. Wrap
the detector in plastic before packing. Provide ample packing material
to cushion the detector.
Warranty
The warranty period is thirty-six (36) months for the Model 660 and
860 Series Flame Detectors and ve (5) years for both the UV and IR
Sensors.
Firey AB will, at its option, repair and return without charge (freight
prepaid) any Omniguard product, used in accordance with Firey AB
ratings and instructions and conrmed by Firey AB to be defective
in workmanship or materials. This warranty shall be valid only if
the product is returned, within the applicable warranty period, to
the factory at Stockholm, Sweden properly packed and with all
transportation charges prepaid. All warranty periods commence from
the date the product is shipped to the end user, provided that delivery
is within six (6) months of the date the product was originally shipped
from the factory. There are no warranties of merchantability, tness, or
implied warranties of any kind, or representations for any other Firey
AB product, except the warranty specied herein. In no event shall
Firey AB be liable for any consequential, special or other damages
attributable to our product. The buyer is solely responsible for the
proper installation, maintenance and use of the Omniguard® ame
detectors, and agrees Firey AB is not in any way liable for any special
incidental or consequential damages whatsoever.
(NO)
(NC)
FIRE LOOP
FAULT
+24 VDC
-24 VDC RTN
TEST INPUT
+ RS485
- RS485
0 to 20 mA
+
-
RS485 LOOP
CHASSIS RTN
(NO)
(NC)
(Momentary & NO)
Notes:
1. The Model 660-1XXXX does not have a 0
to 20 ma option TB1-1 is N/A
2. RS485 120 Ohm resistor is terminating.
Only use one at the beginning of the loop
and at the very end.
3. Fault relay contacts change state
on application of power.
4. Earth Ground should be attached
to clamp in the base.
(Momentary & N.C.)
Electronic
Module
Interface
Customer
Wiring
Interface
RL
K2
Fire Relay
K2
Fire Relay
3
4
5
10
9
8
1
12
RESET SWITCHRESET SWITCH
1 2
250 Ohms Max250 Ohms Max
JP1JP1
Power SupplyPower Supply
TEST SWITCHTEST SWITCH
1 2
120 Ohms 120 Ohms
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
TB1
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
TB1
JP2JP2
K1
Fault Relay
K1
Fault Relay
3
4
5
10
9
8
1
12
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13©Firey AB (Oktober 2016)
Ordering information
Temperature rating
0 Industrial temp. re detector
1 High temp. re detector
Housing material/conduit entry
0 Aluminium, 3/4-14 NPT (white)
2 Stainless Steel, 3/4-14 NPT
3 Sluminium, M20-1.5 (white)
5 Stainless Steel, M20-1.5
Test feature
0 No self-test
1 Auto self-test
Type:
Omniguard® model 660
Ordering number:
660 - X X X X X
Approval
0FM, SIL2, CSA, Russian Fire Certicate,
IECEx, ATEX, EMC, LVD, CSFM
3SIL2, IECEx, ATEX, EMC, LVD
Fire relay conguration
0 Latching
1 Non-Latching
Designation:
Ultraviolet ame detector
To order Model 660, please specify
Fire type
0 Hydrocarbon
1 Hydrocarbon/ Non-hydrocarbon
Housing material/conduit entry
0 Aluminium, 3/4-14 NPT (white)
2 Stainless Steel, 3/4-14 NPT
3 Sluminium, M20-1.5 (white)
5 Stainless Steel, M20-1.5
Test feature
0 No self-test
1 Auto self-test
Type:
Omniguard® model 860
Ordering number:
860 - X X X X X
Agency approvals
0FM, SIL2, CSA, Russian Fire Certicate,
IECEx, ATEX, EMC, LVD, CSFM
3SIL2, IECEx, ATEX, EMC, LVD
Fire relay conguration
0 Latching
1 Non-Latching
Designation:
Ultraviolet- infrared ame detector
To order Model 860, please specify
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14 ©Firey AB (Oktober 2016)
Notes
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15©Firey AB (Oktober 2016)
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Firey AB
Phone: [phone]
Fax: [phone]
E-mail: omniguardsales@rey.se
www.omniguardbyrey.se
Address
Heliosgatan 3
120 30 Stockholm
Sweden
Publication No. 1031229 Rev. M
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