Spectrex 20/20L (LB) - UV/IR Flame Detector - Manual (Page 21)

Spectrex Inc. - SharpEye TM UV/IR Flame Detector Manual – TM20/20LB Rev E, August 2004
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Optional Latching (default is non-latching):
The detector includes a latched alarm output capability, which operates
according to the DIP-switch SW1-1 position. Upon the detection of a fire, the
detection signal is latched until manually reset (disconnecting the power supply
or upon performing a manual BIT). Latching affects the Alarm Relay, 4-20mA
output, Alarm LED, (the ACCESSORY RELAY will latch only when SW1-4 at
OFF position).
Built-in Test Options
(refer to 2.5):
Successful Manual BIT activates the following outputs according to SW1
switches:
SW1-6 ON:
The Alarm relay will be activated for 3
seconds. The 4-20mA output will provide
20mA for 3 seconds.
SW1-7 ON & SW1-6 ON: The Accessory & Alarm relays will be activated
for 3 seconds. The 4-20mA output will provide
20mA for 3 seconds.
SW1-7 ON & SW1-6 OFF: The Alarm relay will be activated for 3
seconds. The 4-20mA output will provide
16mA for 3 seconds.
ACCESSORY RELAY AS EOL: If SW1-8 is ON then the Accessory Relay is
used as End of Line (EOL) relay. In this case
the accessory relay is always active as long as
the detector is powered.