Hach sc200 Manuel D'utilisation De Base page 11

Wiring for power
W A R N I N G
Potential Electrocution Hazard. Always disconnect power to the
instrument when making electrical connections.
W A R N I N G
Potential Electrocution Hazard. If this equipment is used outdoors or in
potentially wet locations, a Ground Fault Interrupt device must be used
for connecting the equipment to its mains power source.
D A N G E R
Electrocution Hazard. Do not connect AC power to a 24 VDC powered
model.
W A R N I N G
Potential Electrocution Hazard. A protective earth (PE) ground
connection is required for both 100-240 VAC and 24 VDC wiring
applications. Failure to connect a good PE ground connection can result
in shock hazards and poor performance due to electromagnetic
interferences. ALWAYS connect a good PE ground to the controller
terminal.
N O T I C E
Install the device in a location and position that gives easy access to the disconnect
device and its operation.
The controller can be purchased as either a 100-240 VAC powered model
or a 24 VDC powered model. Follow the appropriate wiring instructions for
the purchased model.
The controller can be wired for line power by hard-wiring in conduit or
wiring to a power cord. Regardless of the wire used, the connections are
made at the same terminals. A local disconnect designed to meet local
electrical code is required and must be identified for all types of installation.
In hard-wired applications, the power and safety ground service drops for
the instrument must be 18 to 12 AWG.
Notes:
• The voltage barrier must be removed before making any electrical
connections. After making all connections, replace the voltage barrier
before closing the controller cover.
• A sealing type strain relief and a power cord less than 3 meters (10 feet)
in length with three 18-gauge conductors (including a safety ground
wire) can be used to maintain the NEMA 4X/IP66 environmental rating.
• Controllers can be ordered with AC power cords pre-installed.
Additional power cords may also be ordered.
• The DC power source that supplies power to the 24 VDC powered
controller must maintain voltage regulation within the specified 24
VDC-15% +20% voltage limits. The DC power source must also provide
adequate protection against surges and line transients.
Wiring procedure
Follow the numbered steps and
for power. Insert each wire into the appropriate terminal until the insulation
is seated against the connector with no bare wire exposed. Tug gently after
insertion to make a secure connection. Seal any unused openings in the
controller box with conduit opening sealing plugs.
Table 1 or Table 2 to wire the controller
English 11