Hitachi HSC-2100 Hardware Manual page 84

3 INSTALLATION AND MODULE MOUNTING
NOTICE
As the external power supply, select a power supply with overvoltage and
overcurrent protection.
If a product smokes or gives off an offensive smell, immediately turn off the
power to the product and find the cause.
Install a fuse or circuit protector for the external power supply for protection
against short-circuit. The circuit protector selected must match the ratings of
the external power supply.
Before applying power to the programmable controller, check that all the cable
wirings for the product are correct.
Before terminating the programmable controller (by shutting down or
resetting), check that all the peripheral equipment is already stopped or will not
be affected by the termination.
Failure of an installed module may damage the contents of memory spaces.
Be sure to make a backup copy of any important data in memory.
Before carrying out such operations as program alteration, forced output, run,
stop, etc. during operation of the programmable controller, ensure safety.
Any mis-operation may result in machine breakage or an accident.
Apply power to the various components of your application system in the
proper order. If this is done in the wrong order, your system may malfunction,
resulting in machine breakage or an accident.
Component parts containing gallium arsenide (GaAs) in a photocoupler or LED
are used in the programmable controller. Gallium arsenide is designated as a
harmful substance by law. Use extreme care in handling, particularly in
scrapping the product. Have a specialized agent dispose of the product as
industrial waste.
After the power supply has been switched off, wait for more than one second
before you switch it on again. Disregarding this rule may cause product
failure.
Do not insert your finger or a foreign object into any opening in a connector or
the mount base. Disregarding this rule may result in bodily injury.
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