Spectrex 40/40R - Single IR Flame Detector - Manual (Page 64)

SharpEye TM Single IR Flame Detector User Guide
52 Typical Wiring Configurations
Figure 11: 0-20mA Wiring Option 1 (Unisolated Sink 3-Wire)
Figure 12: 0-20mA Wiring Option 2 and 3 (Source 3-Wire available
with the HART Protocol)
Note: There are no 0-20mA outputs in wiring options 4 and 5.