Hitachi S10mini LQS070 Hardware Manual page 4

Devise an emergency stop circuit, interlock circuit, and other similar circuits
outside the programmable controller. Disregarding this rule may result in
damage to the equipment or cause an accident if the programmable controller
fails.
Keep it in mind that this hardware unit operates on a high voltage. If the user
touches a high-voltage terminal inadvertently during connection or disconnection
of this hardware unit or its cable, he or she may suffer from an electric shock.
Also, this hardware unit may be damaged due to a short circuit or noise. Be
sure to switch off the hardware unit before connecting or disconnecting it or its
cable.
This hardware unit may fail if the ambient temperature is too high. The
hardware unit may also malfunction due to interference by electromagnetic
waves from adjacent hardware. To dissipate heat and reduce electromagnetic
interference, provide the specified mount of space between the cubicle and this
hardware unit and between the hardware unit and other ones.
After installing this hardware unit, measure temperatures near the in-cubicle
controller and the mount base during operation, and check whether the
measurements are within the limits. If the specified amount of space cannot be
provided or the measured temperature is too high, use a cooling fan.
At an extremely high temperature, this hardware unit may fail. Secure the
mount base to a vertical surface. If the mount base is secured horizontally, heat
does not dissipate efficiently, resulting in an extremely high temperature. This
may further cause the hardware unit to fail or its parts to deteriorate.
This hardware unit may be damaged due to static electricity. Ground yourself
before setting switches or connecting or disconnecting cables or connectors with
the hardware unit.
This hardware unit may be damaged during its installation or removal unless the
following rules are observed:
• Check that the connector pins are not damaged (bent or broken), are aligned
straight and are free from dust.
• Move the hardware unit along an imaginary vertical surface to the face of the
mount base. If the product is inserted or removed slantwise from the
connector on the mount base, connector pins may be bent.
DANGER
CAUTION