Hitachi HSC-2100 Hardware Manual page 37

1 GENERAL INFORMATION
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.
As the power to each mounted module, use a power supply matching the
ratings of the mounted module.
If a power supply not matching its ratings is connected to the module, it may
lead to a fire.
Component parts containing gallium arsenide (GaAs) in a photocoupler or LED
are used in products described in this manual.
Gallium arsenide is designated as a harmful substance by law.
Use extreme care in handling, particularly in scrapping the products.
Have a specialized agent dispose of the products as industrial waste.
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 any product described in this manual, check that all
the cable wiring for the product is 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, breakdown, or the like of an installed module may damage the
contents of memory spaces.
Be sure to make a backup copy of any important data in memory.
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