Precautions For Safe Use - Omron DEVICENET SAFETY - CONFIGURATION MANUAL 05-2005 System Configuration Manual

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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 temperature
• 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 following locations. Inappropriate
and insufficient measures may result in malfunction.
• 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
Confirim 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.
Solid wire
Stranded (flexible) wire
• Turn OFF the power supply before starting any wiring operations. Not doing so may result in unex-
pected operation of external devices connected 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.
• Be careful not to get your fingers caught when attaching connectors to the plugs on the products.
• Tighten the DeviceNet connector to the appropriate torque (0.25 to 0.3 Nm).
• Incorrect wiring may reduce safety functions. Perform all wiring correctly and check operation prior to
using the products.
• Remove the dust-preventive label after completing wiring to ensure proper heat dissipation.
Selecting a Power Supply
Use a DC power supply satisfying the following requirements.
• The secondary circuits of the DC power supply must be isolated from the primary circuit by double insu-
lation or reinforced insulation.
• The DC power supply must satisfy the requirements for class 2 circuits or limited voltage/current circuits
defined in UL 508.
• The output hold time must be 20 ms or longer.
Periodic Inspections and Maintenance
• Turn OFF the power supply before replacing the products. Not doing so may result in unexpected oper-
ation of external devices connected to the products.
• Do not disassemble, repair, or modify the products. Doing so may impair the safety functions.
0.2 to 2.5 mm2 (AWG 24 to AWG 12)
0.34 to 1.5 mm2 (AWG 22 to AWG 16)
Stranded wires should be prepared by attaching ferrules with plastic insu-
lation collars (DIN 46228-4 standard compatible) before connecting them.
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