Omron CP1E-E10DT-A, User Manual

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5 Installation and Wiring
5-16 CP1E CPU Unit Hardware User’s Manual(W479)
• Wire a separate circuit for the power supply circuit so that there is no voltage drop from the inrush
current or startup current that flows when other equipment is turned ON.
• When several CP1E PLCs are being used, it is recommended to wire the PLCs on separate cir-
cuits to prevent a voltage drop from the inrush current or incorrect operation of the circuit breaker.
z
DC Power Supply Wiring
• Use crimp terminals or solid wire for power supply wiring. Do not connect bare stranded wires
directly to terminals.
• M3 self-rising terminal screws are used. Tighten the terminal block screws to the torque of 0.5
N·m.
• Use a power supply within the allowable voltage fluctuation range (20.4 to 26.4 VDC).
• The maximum power consumption is 20 W for N30/40/60(S ) or NA20 CPU Units, 13 W for
N14/20 CPU Units, 9W for E10 CPU Units.
• There will be a inrush current of about five times that level when the power is turned ON.
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Grounding
• Always ground the ground terminal to 100
Ω
or less to protect against electric shock and incorrect
operation from electrical noise.
• The GR terminal is a ground terminal. To prevent electrical shock, use a dedicated ground line
(2mm
2
min.) of 100
Ω
or less.
• Do not connect ground lines to other devices or to the frame of a building. Doing so will reverse
the effectiveness of the ground and instead have a bad influence.
Precautions for Safe Use
• Be sure not to reverse the positive and negative leads when wiring the power supply termi-
nals.
• Supply power to all of the Power Supply Units from the same source.
• Use reinforced insulation or double insulation for the DC power supplies connected to DC
Power Supply Units to comply with EC(Low Voltage Directive) Directives.
Wiring DC Power Supply and Ground
24VDC
- +
COM 01 03 09 01 05 07 11 03 05 07 09 11
00 02 04 06 08 10 00 02 04 06 08 10
+ -
NC
GR:Protective ground terminal
MCCB
Upper Terminal Block
Ground to 100
Ω
or less
6.2mm max. 6.2mm max.