Power supply cautions, Grounding cautions – Proface APL3000B - Node Box PC User Manual

Page 13

CA7-ACCNL-01 of Pro-face or
FKC 2,5/3-STF-5,08 of Phoenix Contact
DC type :
CA7-DCCNL-01 of Pro-face or
GFKC 2,5/3-STF-7,62 of Phoenix Contact

Connecting the Power Cord

(1) Confirm that the power is not supplied to

the PL unit.

(2) Push the Opening button with a small

slot screw driver to open the desired pin
hole.

(3) Insert each pin terminal into its each

hole. Release the Opening button to
clamp the pin place.

(4) After inserting all three pins, insert the

Power Plug into the Power Connector at
PL. Fix the plug with two minus screws.

• Confirm that all wires are connected

correctly.

• The torque required to tighten these

screws is 0.5 to 0.6 N•m.

• To prevent the possibility of a terminal

short, use a pin terminal that has an
insulating sleeve.

Power Supply Cautions

• Input and Output signal lines must be sepa-

rated from the power control cables for
operational circuits.

• To improve the noise resistance, be sure to

twist the ends of the power cord wires

before connecting them to the Power con-
nector (Plug).

• The PL unit’s power supply cord should

not be bundled with or kept close to main
circuit lines (high voltage, high current), or
input/output signal lines.

• To reduce noise, make the power cord as

short as possible.

• If the supplied voltage exceeds the PL

unit’s range, connect a voltage transformer.

• Between the line and ground, select a

power supply that is low in noise. If there
is an excess amount of noise, connect an
insulating transformer.

• The temperature rating of field installed

conductors: 75

°C only.

• Use constant voltage and insulating

transformers with capacities exceeding
Power Consumption value.

• Connect a surge absorber to handle

power surges.

• Be sure to ground the surge absorber

(E1) separately from the PL unit (E2).
Select a surge absorber that has a maxi-
mum circuit voltage greater than that of
the peak voltage of the power supply.

Grounding Cautions

• Be sure to create an exclusive ground for the

Power Cord’s FG terminal. Use a grounding
resistance of 100

Ω, a wire of 2mm

or thicker,

or your country’s applicable standard.

• The SG (signal ground) and FG (frame

ground) terminals are connected internally
in the PL unit.
When connecting the SG line to another

Opening Button

Black

White

Green/Yellow

AC power supply cable

24V

Opening Button

DC Power supply cable

Lightning Surge Absorber