95-8576
2
3.3
OUTpUTS
Relays
The standard detector is furnished with fire, fault and
auxiliary relays. All three relays are rated 5 amperes
at 30 VDC.
The Fire Alarm relay has redundant terminals and
normally open / normally closed contacts, normally
de-energized operation, and latching or non-latching
operation.
The Fault relay has redundant terminals and normally
open contacts, normally energized operation, and
latching or non-latching operation.
The Auxiliary relay has normally open / normally
closed contacts, and is configurable for energized or
de-energized operation, and latching or non-latching
operation.
4 to 20 mA Output
A 4 to 20 mA output is available as an option (in
addition to the three relays). This option provides a
4 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 volts dc and 600 ohms from 20
to 32 volts dc. 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 4-20 mA with
HART is also available. Refer to Addendum number
95-8613 for complete details.
NOTE
The output of the 4 to 20 mA current loop is not
monitored by the fault detection circuitry of the
X3302. 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 / Signalling 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 tricolor LED on the detector faceplate indicates normal,
fire alarm and fault conditions. Table 2 indicates the
condition of the LED for each status.
OpTICAL INTEGRITY (
Oi
)
Automatic
oi
The X3302 includes the Automatic Optical Integrity
(
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. However, a successful automatic
oi
test does not
produce an alarm condition.
The
Protect•IR
®
signals a fault condition when less than
half of the detection range remains. This is indicated by
the Fault relay and is evident by the amber color of the
LED on the face of the detector. See the "Troubleshooting"
section for further information.
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
4 mA
Normal Operation
20 mA
Fire Alarm
Table 2—Detector Status Indicator
Detector Status
LED Indicator
Power On/Normal Operation
(no fault or fire alarm)
Green
Fault
Amber
Fire (Alarm)
Red
Very High Sensitivity
Four Amber Flashes
During Power-up
