Hach-Lange SC 100 - Manual (Page 18)

Electrical Installation
14
Installation
3.3.3 Wiring for Power at the Controller
DANGER
Explosion hazard. Do not connect or disconnect electrical components or circuits to the
equipment unless power has been switched off or the area is known to be non-hazardous.
DANGER
Do not connect AC power to a sc100 24 V DC powered model.
The sc100 can be purchased as either an 100–230 V AC powered model or a 24 V DC powered
model. Follow the appropriate wiring instructions per the purchased model.
Important Note: A protective earth (PE) ground connection is required by the sc100 for both
100–230 V AC and 24 V DC 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 sc100 terminal.
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.
See
Figure 13 and Figure 14 on page 16 for suggested local disconnect configurations.
1. Obtain appropriate fittings with NEMA 4X/IP66 environmental rating.
2. Loosen the screws using a phillips-head screwdriver and open the hinged controller cover.
3. Remove the high-voltage barrier (see Figure 9 on page 13 ).
4. Insert the wires through the strain relief fitting or conduit hub located in the right-rear access
hole in the bottom of the enclosure. Tighten the strain relief if used, to secure the cord.
5. Properly prepare each wire ( Figure 11 ) and insert each wire into the terminal according to
Table 2 or Table 3 . Tug gently after each insertion to ensure the connection is secure.
6. Seal any unused openings in the controller box with conduit opening sealing plugs.
7. Reinstall the high-voltage barrier and latch to secure.
Figure 11 Proper Wire Preparation and Insertion
1. Strip ¼-inch of insulation. 2. Seat insulation against connector with no bare wire exposed.
Table 2 AC Power Wiring Information (sc100 AC powered model only)
Terminal Number Terminal Description Wire Color Code for North America Wire Color Code for Europe
1 Hot (L1) Black Brown
2 Neutral (N) White Blue
3 Protective Earth (PE) Green Green w/yellow tracer
1
2