Digital Electronics Corporation ST Series Installation Manual

System Design
• Do not create ST touch panel switches that could possibly endanger the safety
of equipment and personnel. Damage to the ST, its I/O unit(s), cable(s), and
other related equipment can cause an output signal to remain continuously ON
or OFF and possibly cause a major accident. Therefore, design all monitoring
circuits using limit switches, etc. to detect incorrect device movement. To pre-
vent accidents related to incorrect signal output or operation, design all switches
used to control vital machine operations so they are operated via a separate
control system.
• Do not create switches used to control machine safety operations, such as
an emergency stop switch, using a ST touch screen icon. Be sure to install
these switches as separate hardware switches, otherwise severe bodily in-
jury or equipment damage can occur.
• Please design your system so that equipment will not malfunction due to a
communication fault between the ST and its host controller. This is to pre-
vent any possibility of bodily injury or material damage.
• Do not use the ST unit as a warning device for critical alarms that can cause
serious operator injury, machine damage or production stoppage. Critical
alarm indicators and their control/activator units must be designed using stand-
alone hardware and/or mechanical interlocks.
• The ST is not appropriate for use with aircraft control devices, aerospace
equipment, central trunk data transmission (communication) devices, nuclear
power control devices, or medical life support equipment, due to these de-
vices' inherent requirements of extremely high levels of safety and reliability.
• When using the ST with transportation vehicles (trains, cars and ships), di-
saster and crime prevention devices, various types of safety equipment, non-
life support related medical devices, etc. redundant and/or failsafe system
designs should be used to ensure the proper degree of reliability and safety.
• After the ST backlight burns out, unlike the ST's standby Mode, the touch
panel is still active. If the operator fails to notice that the backlight is burned
out and touches the panel, a potentially dangerous machine operation error
can occur. Therefore, do not use ST touch switches for the control of equip-
ment safety mechanisms, such as Emergency Stop switches, etc. that pro-
tect humans and equipment from injury and damage. If your ST's backlight
suddenly turns OFF, use the following steps to determine if the backlight is
actually burned out.
1)If your ST is not set to Standby Mode and the screen has gone blank, your
backlight is burned out.
2)Or, if your ST is set to Standby Mode, but touching the screen does not
cause the display to reappear, your backlight is burned out.
Installation
• Do not modify the ST unit. Doing so may cause a fire or an electric shock.
• Do not use the ST in an environment where flammable gasses are present,
since operating the ST may cause an explosion.
Wiring
• To prevent an electric shock, be sure to confirm that the ST's power cord is
not connected to the main power when connecting any cords, cables or lines
to the ST.
• Do not use power beyond the ST's specified voltage range. Doing so may
cause a fire or an electric shock.
Maintenance
• The ST uses a lithium battery for backing up its internal clock data. If the battery is
incorrectly replaced, the battery may explode. To prevent this, please do not
replace the battery yourself. When the battery needs to be replaced, please con-
tact your local ST distributor.
WARNINGS
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