Testing The Environment; Dealing With Problems Of Noise; Control Panel Wiring; External Wiring - Omron SYSMAC C Series User Manual

Installing the C20
Testing the environment
Dealing with problems of
noise
Noise source
C20
200mm min.
Grounding (at a ground resistance of
less than 100Q)
© SYSMAC I/O circuit
@ SYSMAC power circuit
General control circuit
@ Power circuit
When you're ready to install the C20, first give attention to the
environmental conditions under which it will normally operate. The PC is
ruggedized for reliable use under tough conditions, but you still need to
avoid using it in these areas:
Where the ambient temperature is below 0° or above 55°C.
Where abrupt temperature changes may cause condensation.
Where relative humidity is below 35% or above 85%.
Where corrosive or flammable gas may occur.
In extremely dusty conditions, or where subject to salt or iron particles.
Where subject to abnormal vibration or shock.
In direct sunlight.
Where it can be splattered with water, oil, or chemical substances.
One of the most important considerations when installing and wiring the
C20 is the problem of noise. The C20 should be mounted at least 200mm
from high-tension equipment or wiring.
Control panel wiring
Wherever possible, always use wiring ducts to contain and protect the
wiring for the I/O units. I/O wires should not be placed in the same duct
with a power line or other wiring.
External wiring
Use standard wiring conduits for routing I/O and power lines to the C20.
However, be sure to use separate conduits for the 1/0 wiring.
The following points are important when the controlled system requires
the laying of 400V 10A max. or 220V 20A max. power lines.
A minimum distance of 300mm must be provided between the |/O lines
and power cables when their conduits are run parallel to each other.
lf the cables must be placed in the same duct at the point of connection to
the equipment, be sure to screen them with a grounded metal plate.
Metal (iron) plate
Z a 200mm min.
Grounding (at a ground resistance of less than 1000)
2-3