Det-Tronics X3301 Multispectrum IR Flame Detector - Manual (Page 4)

95-8527 2 19.2
The Auxiliary relay has normally open / normally
closed contacts, and is configurable for energized or
de-energized operation, and latching or non-latching
operation.
0 to 20 mA Output
A 0 to 20 mA output is available as an option (in
addition to the three relays). This option provides
a 0 to 20 mA dc current output for transmitting
detector status information to other devices. The
circuit can be wired in either an isolated or non-
isolated configuration and can drive a maximum
loop resistance of 500 ohms from 18 to 19.9 Vdc
and 600 ohms from 20 to 30 Vdc. Table 1 indicates
the detector status conditions represented by the
various current levels. The output is calibrated at the
factory, with no need for field calibration. A model
with relays and 0-20 mA with HART is also available.
Refer to Addendum number 95-8577 for complete
details.
NOTE
The output of the 0 to 20 mA current loop is not
monitored by the fault detection circuitry of the
X3301. Therefore, an open circuit on the loop will
not cause the fault relay to change state or the
detector status LED to indicate a fault. The status
of the LED always follows the status of the relays.
An alarm condition will normally over-ride a fault
condition, unless the nature of the fault condition
impairs the ability of the detector to generate or
maintain an alarm output, i.e. loss of operating power.
LON/sLC Output
The EQP model is designed for use exclusively with
the Det-Tronics Eagle Quantum Premier system. The
detector communicates with the system controller over
a digital communication network or LON/SLC (Local
Operating Network / Signaling Line Circuit). The LON/
SLC is a fault tolerant, two wire digital communication
network arranged in a loop configuration. Analog and
relay outputs are not available on this model.
LED
A tri-color LED on the detector faceplate indicates
normal condition and notifies personnel of fire alarm
or fault conditions. Table 2 indicates the condition of the
LED for each status.
oi
(OpTICAL INTEgRITy)
Automatic oi
The X3301 includes the Automatic oi feature — a
calibrated performance test that is automatically
performed once per minute to verify complete detector
operation capabilities. No testing with an external test
lamp is required. The detector automatically performs
the same test that a maintenance person with a test
lamp would perform — once every minute, 60 times
per hour. However, a successful Automatic oi test
does not produce an alarm condition.
The X3301 signals a fault condition when less than
half of the detection range remains. This is indicated
by the Fault output and is evident by the yellow color
of the LED on the face of the detector. The oi fault
condition is self-clearing if the optical contamination
is temporary. If the contamination is not automatically
cleared and the oi fault remains, the detector may
require cleaning or service. See the "Troubleshooting"
section for further information.
Magnetic oi / Manual oi
The detector also incorporates both Magnetic oi
(Mag oi ) and Manual oi (Man oi ) features that
provide the same calibrated test as the Automatic
oi , and in addition actuates the Alarm output to verify
operation for preventive maintenance requirements.
These features can be performed at any time and
eliminate the need for testing with a non-calibrated
external test lamp.
Table 2—Detector Status Indicator
Table 1—Detector Status Conditions Indicated by Current Level
Current Level (±0.3 mA) Detector status
0 mA Power Fault
1 mA General Fault
2 mA oi
Fault
3 mA Hi Background IR Fault
4 mA Normal Operation
20 mA Fire Alarm
Detector status LED Indicator
Power On/Normal Operation
(no fault or fire alarm)
Green
Fault Yellow
Fire (Alarm) Red
Low Sensitivity
One Yellow Flash
During Power-up
T-Low Sensitivity
Three Yellow Flashes
During Power-up
Medium Sensitivity
Two Yellow Flashes
During Power-up
Very High Sensitivity
Four Yellow Flashes
During Power-up
NOTE: See "Detector Sensitivity Levels" for additional information.