Spectrex 20/20L (LB) - UV/IR Flame Detector - Manual (Page 19)

Spectrex Inc. - SharpEye TM UV/IR Flame Detector Manual – TM20/20LB Rev E, August 2004
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4. Operation
4.1 Visual Indications
Two indication LEDs are located in the detector’s front window.
Yellow LED - Provides indication of Normal or Fault state.
Red LED
- Provides indication of Warning or Alarm state.
Table 3. LED indications within different detector states
Detector State Yellow LED Red LED
Normal Blink at 0.5Hz Rate Off
Fault or BIT Fault Blink at 2Hz Rate Off
Warning Blink at 0.5Hz Rate Blink at 2Hz Rate
Alarm Blink at 0.5Hz Rate On
Warning at BIT Fault Blink at 2Hz Rate Blink at 2Hz Rate
Alarm at BIT Fault Blink at 2Hz Rate On
4.2 Output Signals
The detector includes the following control outputs:
• Alarm Relay
• Accessory Relay
• Fault Relay
• 4-20mA Current Source Output