Product Overview
28
SharpEye™
UV Flame Detectors User Guide
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
4mA
Warning
Red
2Hz
Off
On
4
On
16mA
Alarm
1
Red
Constant On
On
On
20mA
Latched
2
Red
Constant On
Off
On
20mA
On
4
On
20mA
BIT Fault
3
Yellow
4Hz
Off
Off
Off
2mA
Warning at
BIT Fault
Red
2Hz
Off
On
4
Off
16mA
Alarm at
BIT Fault
Red
Constant On
On
Off
20mA
Fault
Yellow
4Hz
Off
Off
Off
0mA
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-latched).
3
The detector will remain in BIT Fault state until it has passed a successful BIT.
4
The auxiliary relay can be activated at the warning level or alarm level, depending on
programmed function.
Note:
The outputs depend on the wiring options.
2.5.6.1
Optional Latching
Alarms are set as non-latching by default. However, the detector includes a
latched alarm output capability, which operates according to the programmed
function.
If selected, upon detection of a fire, the detection signal is latched until a manual
reset is performed (disconnecting the power supply, or performing a manual BIT
(see
on page 31).
Latching affects the alarm relay, 0
–
20mA output, the alarm LED (the auxiliary
relay will be latched only when the programmable function auxiliary relay is set
to yes.