15
Switch Installation
Connecting to Power
Figure 6 Ground-Lug Screw
7. Attach the other end of the ground wire to a grounded bare metal surface, such as a ground bus, a grounded DIN
rail, or a grounded bare rack.
Connecting the Power Supply to a DC Power Source
You can also connect the power converter to a DC power source. Several power supplies can be used. Refer to
Supported Power Supplies, page 13 for the appropriate DC input ratings.
Note: Use copper conductors only, rated at a minimum temperature of 167°F (75°C).
Warning: Use twisted-pair supply wires suitable for 86°F (30°C) above surrounding ambient temperature outside
the enclosure. Statement 1067
1. Measure a single length of stranded copper wire long enough to connect the power converter to the earth ground.
The wire color might differ depending on the country that you are using it in.
For connections from the power converter to earth ground, use shielded 14-AWG stranded copper wire.
2. Measure a length of twisted-pair copper wire long enough to connect the power converter to the DC power source.
For DC connections from the power converter to the DC source, use 10-AWG twisted-pair copper wire.
3. Using a 14-gauge wire-stripping tool, strip the ground wire and both ends of the twisted pair wires to 0.25 inch (6.3
mm) ± 0.02 inch (0.5 mm). Do not strip more than 0.27 inch (6.8 mm) of insulation from the wires. Stripping more
than the recommended amount of wire can leave exposed wire from the power and relay connector after installation.
4. Connect one end of the stranded copper wire to a grounded bare metal surface, such as a ground bus, a grounded
DIN rail, or a grounded bare rack.
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