Before Using Pcs - Hitachi HSC-2100 Hardware Manual

1 GENERAL INFORMATION

1.4 Before Using PCs

Hitachi's programmable controllers (PCs) are a product of both electronic circuit technology and
processor technology, and should be used in consideration of the following:
(1) Your application system should be constructed in such a way that it will not go beyond any
of its maximum rated values, operating power supply voltage ranges, heat dissipation
characteristics, installation conditions, etc. during its operation. If the application system is
used beyond those limits, and this results in a system breakdown or accident, then the
manufacturer will accept no liability for the result. For information on the range of
warranty, see "WARRANTY AND SERVICING" in the front matter of this manual.
(2) The programmable controller is not of fire-, dust-, and drip-proof structure, so it must be
mounted in a dust- and drip-proof steel enclosure as shown below.
Where for some reason the programmable controller has to be installed at a
location that has a possibility of being exposed to rain and water conditions, be
sure to mount it in a drip-proof enclosure. Disregarding this rule may result in
product failure.
Apply putty to close up the
opening for cabling.
NOTICE
1-8
Steel enclosure
CPU unit
I/O unit