14
(3) Strip the power cord, twist the conductor’s
wire ends, insert them into the pin terminal
and crimp the terminal. Attach the terminal
to the Power Connector.
• Use a flat-blade screwdriver (Size 0.6 x
3.5) to tighten the terminal screws.
The torque required to tighten these
screws is 0.5 to 0.6 N•m [5-7Lb•In.].
• Do not solder the cable connection.
(4) Attach the Power Connector (plug) to the
PL and fix it to the PL main unit with
right/left tightening screws.
3.
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 the ground, be sure to
use a low noise power supply. If there is an
excess amount of noise, connect a noise
reducing transformer.
• The temperature rating of field installed
conductors: 75
°
C only.
• Use voltage and noise reducing trans-
formers with capacities exceeding
Power Consumption value.
• Branch Circuit Protective device shall be
use for rating 20A for DC24V input device.
• 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.
4.
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
2
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
device, be sure that the design of the system/
connection does not produce a shorting loop.
• The grounding wire should have a cross
sectional area greater than 2mm
2
. Create
the connection point as close to the PL unit
as possible, and make the wire as short as
possible. When using a long grounding
wire, replace the thin wire with a thicker
wire, and place it in a duct.
FG
+
-
Lightening Surge Absorber
E1
E2
FG
PL
Other
Equipment
Exclusive Grounding
(BEST)
PL unit
