Specifications

1
 System Design
• Do not create PL-6930 series (hereafter referred to as the “PL”) touch panel switches that
could possibly endanger the safety of personnel or equipment. A malfunction of the PL unit,
its I/O unit(s), cable(s), or other related equipment can cause unexpected output signals,
leading to a serious accident. Be sure to design all important machine operation switches so
they are operated via a separate control system, and not via the PL.
• Do not create PL touch panel switches to control machine safety operations, such as an
emergency stop switch. Install these switches as separate hardware switches, otherwise
severe bodily injury or equipment damage can occur.
• Be sure to design your system so that a communication fault between the PL and its host
controller will not cause equipment to malfunction. This is to prevent any possibility of
bodily injury or equipment damage.
• Do not use the PL as a warning device for critical alarms that can cause serious operator
injury, machine damage or can halt system operation. Critical alarm indicators and their
control/activator units must be designed using stand-alone hardware and/or mechanical
interlocks.
• Do not use the PL with aircraft control devices, aerospace equipment, central trunk data
transmission (communication) devices, nuclear power control devices, or medical life
support equipment, due to these devices’ inherent requirements of extremely high levels of
safety and reliability.
• Be sure to use redundant and/or failsafe system designs to ensure adequate levels of system
reliability and safety when using the PL with transportation vehicles (trains, cars and ships),
disaster and crime prevention devices, various types of safety equipment, non-life support
related medical devices, and other similar equipment.
• After the PL unit’s backlight burns out the touch panel is still active, unlike the PL unit’s
“Standby Mode”. 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
create PL unit touch panel switches that may cause injury and/or equipment damage.
If your PL unit’s backlight suddenly turns OFF, use the following steps to determine if the
backlight is actually burned out.
1) If the PL unit’s “Backlight Control” is not set and the screen has gone blank, your
backlight is burned out.
2) If the PL unit’s “Backlight Control” is set to Standby Mode and the screen has gone
blank, and touching the screen or performing another input operation does not cause the
display to reappear, your backlight is burned out.
 Handling
• Do not modify the PL unit. Doing so may cause a fire or an electric shock.
• Do not operate the PL in an environment where flammable gases are present, since it may
cause an explosion.
 Wiring
• To prevent an electric shock be sure to disconnect your PL unit’s power cord from the power
supply before wiring the PL.
• Do not use voltage beyond the PL unit’s specified range. Doing so may cause a fire or an
electric shock.
Essential Safety Precautions