Owner's manual

Spectrex Inc. - SharpEye
TM
CCTV Model Flame Detector Manual – TM 788100, Rev. A January 2005
11
4.2 Output Signals
The detector controls the following outputs:
•
Alarm relay
• Accessory relay
• Fault relay
•
4-20mA current output
•
RS-485 communication
The detector can be in one of the following states.
Normal: The detector is functioning normally.
BIT: The detector performs a Built-In-Test.
Warning: Fire detected - changed to warning – pre-alarm state.
Alarm: Fire detected - changed to fire alarm state.
Latched Alarm
(Optional)
The alarm outputs are latched due to the detection of a fire that
has already been extinguished.
Fault: A fault is detected during a BIT sequence or the power supply is
too low. In each state the detector will activate different outputs
as specified in table 6.
Table 6: Output Signals Versus Detector State
Detector
State
Power
Led
Alarm
Led
Alarm
Relay
Accessory
Relay
Fault
Relay
4-20mA
Output
Normal
On Off Off Off On 5mA
Warning On Flash
2Hz
Off On On 10mA
Alarm (4) On On On On On 15mA
Latch (2) On Off On Off On 5mA
Fault (3) Flash
4Hz
Off Off Off Off 0mA
Note:
1. The video output can be activated continuously or only when a fire is detected,
according to programmable function. See Table 8
2. The Alarm state can be latched, according to programmable function
3. The detector will be in its BIT FAULT state until it has passed a successful BIT.
4. The alarm outputs will be activated as long as the alarm conditions are present
and will stop approximately 5 seconds after the fire is no longer detected.