Hach 9586sc, Basic User Manual

Page: 11 / 384

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. Make sure that the field wiring insulation is rated 80 °C (176 °F) minimum.
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
Refer to the illustrated steps that follow and Table 1 or Table 2 to wire the controller 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 sure that there is a secure connection. Seal
any unused openings in the controller box with conduit opening sealing plugs.
Table 1 AC power wiring information (AC powered models only)
Terminal Description Color—North America Color—EU
1 Hot (L1) Black Brown
2 Neutral (N) White Blue
— Protective Earth (PE) Ground lug Green Green with yellow stripe
English 11