Spectrex Quasar 900 Open-Path Gas Detection System - Manual (Page 46)

SafEye TM Quasar 900 Gas Detector
34 Detector Terminal Wiring
5.8 Detector Terminal Wiring
The Detector has six wiring terminals.
The following describes the function of each electrical terminal of the
detectors.
Table 11: Wiring Options
Terminal
No. Function
1 Power +24V DC
2 Return +24V DC
3 0-20mA (Input)
4 0-20mA (Output)
5 RS-485 (+)
6 RS-485 (-)
5.9 Flash Source Wiring
5.9.1 Wiring
➣ To install the wiring:
1 Release the back screw bolt (item 15, Figure 5), and open the source
back cover (item 14, fig. 4). The chamber is now revealed.
2 Remove the protective plug mounted on the source conduit/cable entry
inlet; pull the wires through the source inlet (item 4, Figure 7). Use a
3/4” – 14NPT or M25x1.5 explosion-proof conduit connection / cable
gland to assemble the cable / explosion-proof conduit to the Detector.
3 Connect the wires to the required terminals (item 2, Figure 7) according
to the wiring diagram. See paragraph Terminal Wiring, page 35 and
Figure 11 Appendix A.
4 Connect the grounding wire to the ground screw outside Detector
(item 3, Figure 7). The source must be well grounded to Earth Ground.
5 Place and secure the source back cover by screwing the cover and
secure the back screw bolt.