Spectrex 40/40U-UB - UV Flame Detector - Manual (Page 25)

TM 40/40U, Rev (7) July 2013
Performance Considerations 13
1.5.6 Detector Status
The possible detector function statuses are listed in Table 7. A more detailed
fault analysis can be seen via HART or RS485.
Table 7: Detector Status
Status Description
Normal Normal operation.
BIT Built-In-Test being performed.
Warning Fire detected - changed to Warning (pre-alarm state).
Alarm Fire detected - changed to Fire Alarm state.
Latched Alarm
(Optional) The alarm outputs remain latched on following detection
of a fire that has already been extinguished.
BIT Fault A fault is detected during BIT sequence or other electric
failure. The detector will continue to detect for fire.
Fault A fault is detected when the power supply is too low or
due to a software fault or electrical failure. The detector
will NOT detect fire in this condition.
In each state, the detector activates different outputs, as specified in
Table 8.
Table 8: Output Signals versus Detector State
Detector
State LED
Indicator LED
Mode Alarm
Relay Auxiliary
Relay Fault
Relay mA
output
Normal Green 1Hz Off Off On 4 mA
Warning Red 2Hz Off On (4) On 16 mA
Alarm (1) Red Constant On On On 20 mA
Latch (2) Red Constant On Off On 20 mA
On (4) On 20 mA
BIT Fault (3) Yellow 4Hz Off Off Off 2 mA
Warning at
BIT Fault Red 2Hz Off On (4) Off 16 mA
Alarm at
BIT Fault Red Constant On On Off 20 mA
Fault Yellow 4Hz Off Off Off 0 mA
Notes:
1 The alarm outputs are activated while alarm conditions exist and will
stop approximately 5 seconds after the fire is no longer detected.
2 The Alarm state can be optionally latched via programmed function.
(Default is non-latching).