Hach 3700 Serie Manual Básico Del Usuario página 10

4.2.3.1 Connect the sensor to the digital gateway
Connect the sensor to the digital gateway. Refer to the documentation supplied with the digital
gateway (DOC273.99.80624).
4.2.3.2 Connect the digital gateway to the controller
Item to collect: Digital extension cable
Use only a digital extension cable that is supplied by the instrument manufacturer. The digital
extension cable is sold separately.
Note: If the length of the digital extension cable is more than 100 m (300 ft), install a termination box. As an
alternative, add an analog extension cable from the sensor to the digital gateway.
1. Remove power from the sc controller.
2. Connect one end of the digital extension cable to the digital gateway.
3. Connect the other end of the digital extension cable to a quick-connect fitting on the sc controller.
Refer to Figure 6.
Note: Keep the cap for the quick-connect fitting for use later.
4. For Class 1, Division 2 Hazardous Location installations, install a connector safety lock on each
end of the digital extension cable. The connector safety locks prevent the cable from being
accidentally disconnected from the digital gateway fitting or the sc controller quick-connect fitting
while the power is on. Refer to
5. Supply power to the sc controller.
Figure 6 Quick-connect fitting
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For Class 1, Division 2 Hazardous Location installations, use a digital extension cable with two
connector safety locks.
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Figure 7.