Wiring Safety And Noise Controls - Omron SYSMAC CP Series User Manual

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Wiring Safety and Noise Controls

I/O Signal Wiring
Whenever possible, place I/O signal lines and power lines in separate ducts or conduits both inside and
outside of the control panel.
(1)
(2)
Suspended ducts
When wiring in the same duct, use shielded cables and connect the shields to the GR terminal to
reduce noise.
Inductive Loads
When an inductive load is connected to an I/O Unit, connect a surge protector or diode in parallel with
the load as shown below.
Diode
L
COM
Precautions for Correct Use Precautions for Correct Use
Use surge protectors and diodes with the following specifications.
Surge protector
Diode
Breakdown voltage
Mean rectification current
CP2E CPU Unit Hardware User's Manual(W613)
(1)
Floor ducts
IN
DC input Relay output
Relay output
Transistor output
Resistance : 50Ω
Capacitor : 0.47μF
Voltage : 200V
: 3 times load voltage
: 1 A
5 Installation and Wiring
(1):I/O cables
(2):Power lines
(2)
(1)
Conduit
L
OUT
Surge protector
COM
OUT
+
Diode
COM
(2)
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