Hach CD300, User Manual

Page: 12 / 140

Connect to power
The instrument can connect to an AC or a DC power source. Refer to Connect to AC power
on page 12 or Connect to DC power on page 14.
When more than one input voltage is used at the same time, the instrument automatically selects the
power supply from the available input voltages, based on
Table 2 . It is possible to set or select the
power supply when the instrument is on for operation without interruption.
Table 2 Power supply sequence
Sequence Assignment Plug, pins
1 AC voltage CON1, pin 1 and 3
2 DC voltage VIN1 CON2, pin 1 and 2
Wiring information
D A N G E R
Electrocution hazard. In order to maintain the NEMA/IP environmental ratings of the enclosure, use
only conduit fittings and cable glands rated for at least NEMA 4X/IP66 to route cables in to the
instrument.
To keep the environmental rating and for safety:
• Make electrical cable connections through the cable strain reliefs. To supply power with conduit,
replace a cable strain relief with a conduit hub. Seal the conduit with plumber's putty.
• Make sure that the diameter of the cables used is 4.3 to 11.4 mm (0.17 to 0.45 in.) so that the
cable strain reliefs hold the cables securely when tightened. Use 24 to 12 AWG to connect to the
terminals.
• Do not put more than one cable in a cable strain relief.
• Close all enclosure openings that are not used with cable strain reliefs or hardware (not
conductive) approved by local electrical codes. Seal the cable strain reliefs that are not used with
rubber cords (supplied) or cables.
Items to collect:
• Screwdriver, Phillips
• Screwdriver, flat-head, small
• Wire stripper
Connect to AC power
D A N G E R
Electrical shock and fire hazards. Make sure that the supplied cord and non
‐
locking plug meet the
applicable country code requirements.
Connect to AC power with the manufacturer/customer-supplied AC power cord or with conduit. Make
sure that a circuit breaker with sufficient electrical current capacity is installed in the power line.
Installation with a power cord
12 English