Spectrex 20/20MI - Mini Triple IR (IR3) Flame Detector - Manual (Page 37)

Spectrex Inc. - SharpEye TM Mini IR3 Flame Detector Manual – TM 787100, Rev. D April 2011
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6.6 Detector Mounting
When used in hazardous area, in order to comply with intrinsically safe
requirement, barriers must be incorporated and there will also be restrictions on
cable types and lengths. The detailed parameter will be dependent on the type of
barrier used.
A. Choose the wiring configuration according to Appendix A.
B. Connect the wire to the required PIN on the connector or choose the
required color on the cable, according to your wiring diagram.
C. Connect the grounding wire to general screw outside the detector, (Figs.2
and 3). The detector must be well grounded to earth ground for proper
operation.
6.7 Wiring Function
(See Fig. No. 8 and No.9.)
The following describes the function of each electrical wire of the detector:
Power Supply
PIN No. 1 or red wire - used for Input Power
PIN No. 2 or black wire - used for Return
Manual Bit Activation
PIN No. 11 or yellow wire - used for the Manual BIT activation.
The manual BIT is initiated by a momentary connection of the 11 (yellow wire) to
the power supply Return line.
Fault Relay
The Fault output is a N.C. SPST contact relay:
PIN No. 5 or brown wire
PIN No. 6 or light blue wire
The contact is normally energised closed when the detector is in its normal
operational condition.
This output is not available in the intrinsically safe model 20/20MI-XX-X-C.
Alarm Relay
The Alarm output is a N.O. SPST contact relay.
PIN No. 7 or orange wire
PIN No. 8 or violet wire
This output is not available in the intrinsically safe model 20/20MI-XX-X-C.