DET-TRONICS
®
SPECIFICATION DATA
Dual Spectrum®
PM-6
Infrared Flame Detector
APPLICATION
The Det-Tronics Dual Spectrum PM-6 Infrared Flame
Detector is designed to provide long range detection of
hydrocarbon fires. It is designed for use in aircraft
hangars, fuel storage areas, or other large, open areas
where hydrocarbon-fueled fires are a threat. The detector has a 90 degree field of view and can detect a 1 ft2
gasoline fire at a distance of 100 feet (30 meters).
The PM-6 Flame Detector is furnished with a fire alarm
and a fault output relay and is compatible with standard
NFPA 72 fire alarm control panels. The detector is suitable for use in indoor and outdoor installations.
Typical applications for the PM-6 include:
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•
•
•
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Aircraft hangars
Hydrocarbon fuel storage areas
Petrochemical plants
Oil platforms
Paint booths
Turbine enclosures
FEATURES
• Dual wavelength infrared flame detection
• Long range detection
• Fast response
• False alarm immunity
• High resistance to blinding by contamination build-up
on window
• Built-in test (BIT)
• Internal supervision circuitry
• Suitable for intrinsically safe or non-incendive installation
• Adjustable mounting bracket for ease of installation
(optional)
• Approved for use in hazardous locations.
DESCRIPTION
The detector reacts to the infrared radiation emitted by
a flame and is tuned to provide reliable response to
hydrocarbon fueled fires at long distances.
The PM-6 is enclosed in an epoxy painted cast aluminum housing. See Figure 1. The housing has an integral junction box with three 3/4 inch conduit ports, which
can accept either rigid or flexible conduit. Two plugs
are provided for sealing any unused conduit ports.
External wiring is connected to a terminal block mounted inside the junction box. A partition is installed inside
the junction box to separate the power and initiatingdevice circuits in an intrinsically safe installation.
OUTPUTS
The PM-6 is designed to interface with an NFPA 72 fire
alarm control panel. Two SPST dry contact relays are
provided — one fire alarm relay and one fault relay.
Fire Alarm Relay
The fire alarm relay has a normally de-energized coil
and normally open contacts. The relay is energized and
the contacts close when a fire is detected. The fire
alarm relay is latched on and can be reset either by
removing power to the detector or by removing and
then replacing the junction box cover.
®
DETECTION BY DET-TRONICS
©Detector Electronics Corporation 1996
3/96
90-1108
SPECIFICATIONS
OPERATING VOLTAGE—
20 to 28 vdc.
OPERATING CURRENT—
Normal operation: 30 ma at 24 vdc.
Alarm condition:
40 ma at 24 vdc.
FIRE ALARM RELAY—
Normally open contacts are latched closed.
FAULT RELAY—
Normally closed contacts open during fault condition.
RELAY RATINGS—
1.0 ampere at 30 vdc, 0.5 ampere at 125 vac.
Figure 1—PM-6 Detector Dimensions in Inches
RELAY RESET—
By recycling power to the detector or by removing and
replacing the junction box cover.
Fault Relay
Under normal operating conditions, the fault relay coil is
energized (for fail-safe operation) and the contacts are
closed. If operating power is lost, if the power supply
voltage is outside the specified operating range, or if a
detector malfunction is detected, the fault relay coil
becomes de-energized and the contacts open. When
the fault clears, the fault relay closes, ending the fault
signal.
STABILIZATION TIME—
Approximately 3 seconds after power-up.
TEMPERATURE RANGE—
–40°F to +158°F (–40°C to +70°C).
HUMIDITY RANGE—
0 to 99% R H, non-condensing.
The detector is furnished with an automatic self-test that
is performed at power-up and approximately every 15
minutes to verify proper detector operation. This selftest checks detector hardware as well as operating program integrity. If a problem is detected, the fault relay
coil de-energizes and the contacts open.
ENCLOSURE RATING—
NEMA 4X.
VIBRATION RATING—
Designed to withstand severe vibration and shock as
defined in FM Approval Standard 3260.
MOUNTING BRACKET
FIELD OF VIEW—
90 degree solid cone.
The detector can be mounted to most surfaces using
the optional bracket assembly. The mounting bracket
assembly allows adjustments on two axes. When correct position is obtained, it can be locked in place.
RESPONSE TIME—
Typical response time is five seconds for fires
described in Table 1. The detector responds most
quickly to closer or larger fires and more slowly to smaller fires or fires that are further away. Detection range is
decreased when fires are located close to the edge of
the field of view.
WIRING
Detectors can be wired in a standard NFPA class B,
style B or class A, style D configuration. Initiating
device circuits can be either intrinsically safe or nonincendive as required. Intrinsically safe installations
require the use of an approved barrier and an approved
fire alarm control panel. See Figure 2.
NOTE
The detector is specifically tuned and tested to
respond to the fires described in Table 1.
Detection range and response times to fires not
listed in Table 1 should be verified. Contact
Detector Electronics for additional information.
SYSTEM TEST
The detector can be tested by using a live fire or by
using the optional hand-held model PSS-X Tester. A
successful test results in a fire alarm output, therefore,
the suppression system must be de-activated prior to
the test to prevent unwanted actuation.
2
Figure 2—Intrinsically Safe Wiring - Class B, Style B
FALSE ALARM IMMUNITY—
Table 2 lists the false alarm immunity distances of the
detector to various commonly encountered sources of
false alarms. No false alarms occur at greater distances in laboratory measurements.
WEIGHT (Approximate)—
2.5 pounds (1.1 kg).
ENGINEERING SPECIFICATION
The infrared flame detector shall have a 90 degree field
of vision and shall operate from a 20 to 28 volt dc power
source.
RATINGS—
The PM-6 is FM approved for intrinsically safe use in
Class I, Division 1, Groups C and D; Class I, Division 2,
Groups A, B, C and D; Class II, Division 1, Groups E, F
and G; and Class III, Division 1 and 2 hazardous locations. The PM-6 is FM approved in non-incendive circuits in Class I, Division 2, Groups A, B, C and D; Class
II, Division 2, Groups F and G; and Class III, Division 1
and 2 hazardous locations.
Table 1—Detection Threshold Distances
for 5 Second Typical Response Time
3
Fuel
Range (ft)
1 sq. ft. Gasoline
1 sq. ft. JET-A
1 sq. ft. No. 2 Diesel
100
75
50
90-1108
Table 2—False Alarm Immunity Distances
The detector shall be furnished with an automatic selftest that is performed at power-up and approximately
every 15 minutes to verify proper detector operation.
The fault relay shall respond to a detected problem.
The detector shall be FM approved for intrinsically safe
use in Class I, Division 1, Groups C and D; Class I,
Division 2, Groups A, B, C and D; Class II, Division 1,
Groups E, F and G; and Class III, Division 1 and 2 hazardous locations. The detector shall be approved in
non-incendive circuits in Class I, Division 2, Groups A,
B, C and D; Class II, Division 2, Groups F and G; and
Class III, Division 1 and 2 hazardous locations.
A bracket assembly shall be available for mounting the
detector to any type of surface. The bracket shall allow
adjustments on two axes.
The IR detector shall be the Det-Tronics PM-6 Infrared
Flame Detector, no equal.
ORDERING INFORMATION
The detector enclosure shall consist of a NEMA 4X
rated epoxy painted cast aluminum housing, containing
the sensor, fire and fault relays, and the electronic circuitry for the detector. The enclosure shall have an integral junction box with three 3/4 inch conduit ports,
allowing connection of either rigid or flexible conduit.
Two plugs shall be provided for sealing any unused
conduit ports. External wiring connections shall be
made to a terminal block mounted inside the junction
box.
The detector shall be designed to interface with an
NFPA compatible fire alarm control panel in an intrinsically safe or non-incendive circuit. Two SPST dry contact relays shall be provided — one fire alarm relay and
one fault relay. The relays shall be rated 1 ampere at 30
vdc, 0.5 ampere at 125 vac.
The fire alarm relay shall have a normally de-energized
coil and normally open contacts. The relay shall
become energized and the contacts close upon detection of a fire and shall latch until reset by recycling
power or by removing the junction box cover.
When ordering, please specify:
PM-6 Infrared Flame Detector
ACCESSORIES
Mounting Bracket
PSS-X Tester
For assistance in ordering a system to fit your application, please contact:
Detector Electronics Corporation
6901 West 110th Street
Minneapolis, Minnesota 55438 USA
Operator: (952) 941-5665 or (800) 765-FIRE
Customer Service: (952) 946-6491
Fax: (952) 829-8750
Web site: www.detronics.com
E-mail: detronics@detronics.com
Under normal operating conditions, the fault relay coil
shall be energized and the contacts shall be closed. If
operating power is lost, if the voltage level is outside the
specified operating range, or if a detector malfunction is
detected, the fault relay coil shall become de-energized. When the fault clears, the fault relay shall automatically close.
Detector Electronics Corporation
6901 West 110th Street • Minneapolis, Minnesota 55438 • Operator (952) 941-5665 or (800) 765-FIRE
Customer Service (952) 946-6491 • Fax (952) 829-8750 • www.detronics.com • E-mail: detronics@detronics.com