Spectrex 20/20F - Fast UV/IR Flame Detector - Manual (Page 25)

Spectrex Inc. - SharpEye TM UV/IR (F) Flame Detector Manual – TM756100 Rev A, July 2005
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6.7 Terminal Wiring (Figure 6)
The detector contains a terminal board labeled 1 to 7.
The following describes the function of each electrical terminal of the detectors.
Power Supply:
(Terminals 1, 2)
Input power is supplied to terminal No. 1.
The RETURN is connected to terminal No.2.
Manual Bit Activation:
(Terminal 3)
Terminal No. 3 is used for the manual BIT activation. The manual BIT is initiated
by a momentary connection of Terminal No. 3 to the power supply return line.
Alarm Relay:
(Terminals 4, 5)
The Alarm output is a change - over contact relay (SPDT)
Terminal No. 4 is the NO relay contact
Terminal No. 5 is the COMMON relate contact
Fault Relay
: (Terminals 6, 7)
The Fault output in NC SPST contact at terminals no. 6 and 7. The contacts are
closed when the detector is in its normal operational condition
Terminal No. 6 is the NO relay contact.
Terminal No. 7 is the common relay contact.
Note
To protect the dry contacts from voltage surges when connected to
reactive loads (electric motors, sirens, etc.), connect an appropriate
varistor over these contacts.