61-1020/61-0230 Molecular Property Spectrometer
Installation
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9
Wiring the Combustible Gas Detector to a Controller
WARNING: Always verify that the power to the controller is off before you make wiring
connections.
1. Turn off the controller.
2. Turn off or unplug power to the controller.
3. If the detector is mounted remotely from a controller using the junction box, proceed to
If the detector is mounted directly to a controller, it is normally factory wired. Confirm that
the detector’s wires are connected to the appropriate controller detector terminals and skip
to “Start Up” on page 11. See Figure 3, the controller operator’s manual, and the
controller’s detector head specification sheet for the 61-0230 detector for the wiring
connections.
4. Remove the cover from the junction box.
WARNING: To maintain the explosion proof classification of the detector/junction box
combination, a conduit seal must be used within 18 inches of the junction box
conduit hub used for wiring to the controller. Adhere to your local electrical
code when installing the conduit seal.
5. Guide a four-conductor, shielded cable or four wires in conduit through the unused conduit
hub of the junction box. Use appropriate conduit fittings and construction technique for the
environmental rating and hazardous location classification of the junction box. The junction
box is rated NEMA 4X and classified explosion proof for Class I, Groups B, C, and D.
6. Connect the wires to the terminal block in the junction box.
CAUTION:
Leave the shield drain wire insulated and disconnected at the 61-1020.
You will connect the opposite end of the cable’s drain wire at the
controller.
7. Secure the junction box cover to the junction box.
8. Route the cable or wires in conduit leading from the detector through one of the conduit hubs
at the controller. Use appropriate conduit fittings and construction technique for the
environmental rating of the controller. RKI controllers are typically rated NEMA 4X, are not
explosion-proof, and must be installed in a non-hazardous location.
CAUTION:
Do not route power and detector wiring through the same conduit hub.
The power cable may disrupt the transmission of the detector signal to
the controller.
9. Connect the wires to the applicable controller terminal strip. See the controller operator’s
manual and the controller’s detector head specification sheet for the 61-1020 detector.
