Hach LDO, User Manual

Page: 10 / 42

10
Installation
Figure 2 Attaching the Sensor using the Quick-connect Fitting
3.1.1.2 Hard-wiring a sc Sensor to the Controller
Important Note: Hard-wiring the sensor to the sc100 is not an approved method for
Class I, Division 2 Hazardous Locations.
1. Disconnect power to the controller if powered.
2. Open the controller cover.
3. Disconnect and remove the existing wires between the quick-connect and terminal
strip J5, see
Figure 3 on page 11 .
4. Remove the quick-connect fitting and wires and install the threaded plug on the
opening to maintain the environmental rating.
5. Cut the connector from the sensor cable.
6. Strip the insulation on the cable back 1-inch. Strip ¼-inch of each individual wire end.
7. Pass the cable through conduit and a conduit hub or a strain relief fitting
(Cat. No. 16664) and an available access hole in the controller enclosure.
Tighten the fitting.
Note: Use of strain relief fitting other than Cat. No. 16664 may result in a hazard. Use only the
recommended strain relief fitting.
8. Reinstall the plug on the sensor access opening to maintain the environmental rating.
9. Wire as shown in Table 2 and Figure 3 .
10. Close and secure the cover.