Omron DeviceNet Safety, Руководство по настройке системы

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Precautions for Safe Use 4
4 Precautions for Safe Use
■
Handling
Do not drop the products or subject them to excessive vibration or impact.
Doing so may result in error or malfunction.
■
Installation and Storage
Do not install or store the products in the following locations:
• Locations subject to direct sunlight
• Locations subject to temperatures or humidity outside the range specified
in the specifications
• Locations subject to condensation as the result of severe changes in tem-
perature
• Locations subject to corrosive or flammable gases
• Locations subject to dust (especially iron dust) or salts
• Locations subject to water, oil, or chemicals
• Locations subject to shock or vibration outside the range specified in the
specifications
Take appropriate and sufficient measures when installing systems in the fol-
lowing locations. Inappropriate and insufficient measures may result in mal-
function.
• Locations subject to static electricity or other forms of noise
• Locations subject to strong electromagnetic fields
• Locations subject to possible exposure to radioactivity
• Locations close to power supplies
■
Mounting
Confirm the operating suggestions provided in the operation manual for each
product before installation and mounting.
■
Wiring
• Use the following wires to connect external I/O devices to the products.
• Turn OFF the power supply before starting any wiring operations. Not
doing so may result in unexpected operation of external devices con-
nected to the products.
• Properly apply the specified voltage to the product inputs. Applying an
inappropriate DC voltage or any AC voltage may cause reduced safety
functions, damage to the products, or a fire.
• Do not wire cables for communications and I/O signals near high-voltage
lines or power lines.
Contactor Use contactors with a forcibly guided mechanism and monitor the auxiliary
NC contact to detect contactor failures. For feedback, use devices with con-
tacts capable of switching micro-loads of 4 mA at 24 VDC.
Other devices Evaluate whether devices used are appropriate to satisfy the requirements of
the safety category level.
Control device Requirements
Solid wire
0.2 to 2.5 mm
2
(AWG 24 to AWG 12)
Stranded
(flexible) wire
0.34 to 1.5 mm
2
(AWG 22 to AWG 16)
Stranded wires should be prepared by attaching ferrules with plas-
tic insulation collars (DIN 46228-4 standard compatible) before
connecting them.