2. Installation and Wiring
7
2. Installation and Wiring
In this chapter installation and wiring of the intelligent PI/O system will be explained.
This system has superior ability to withstand the environment, but to increase the system
reliability and obtain the most from the system's capabilities, always read and observe the
following precautions before installing the system.
Precautions in Installation
NOTICE:
Always observe the installation conditions given in this manual when installing the
system and mounting the modules.
Otherwise there is a danger that the system will not perform to its full capability.
Install the system where it can be inspected and maintained easily.
Otherwise there is danger that it will be hard to restore the system to operation if something
goes wrong.
Keep the input/output signal lines as far as possible from power lines and devices that
generate electric and magnetic fields.
Otherwise the effect of noise can cause misoperation or malfunction.
The Installation Environment
The intelligent PI/O system can either be mounted directly to a wall or enclosed in a cabinet. In
either case, observe the following environmental conditions.
Installation location
When mounting the intelligent PI/O system directly on a wall, or when installing it in a cabinet,
avoid locations such as the following.
A location where the ambient temperature is outside the range 0 to 55 C. When the system is
stored inside the panel, the temperature inside the panel will equalize to the ambient
temperature.
A location where the relative humidity is outside the range 10 to 90%.
A location where vibration or shock exceeds the allowable level.
A location where there is corrosive gas or flammable gas.
Do not install in a location where there is 0.05 ppm or more of sulphurous acid gas, or 0.01
ppm or more of hydrogen sulphide gas.
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