3
Essential Safety Precautions
General Handling:
WARNINGS
Do not use the PS-G unit 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.
Do not use the PS-G 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.
Do not use the PS-G unit in an environment where flammable gases are present. This may result in an
explosion.
Do not disassemble or modify the PS-G unit in any way (except for replacing the backlight). Doing so
may result in a fire or an electric shock.
When using the PS-G unit with transportation vehicles (trains, cars and ships), disaster 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.
Be sure to design your system so that equipment will not malfunction due to a communication fault
between the PS-G and its host controller. This is to prevent any possibility of injury or damage.
Safety and emergency switches must be installed as separate hardware devices.
Do not create PS-G touch panel switches that could possibly endanger the safety of equipment and
personnel. This is because damage to the PS-G, 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. To
prevent this type of accident, design monitoring circuits using devices such as limit switches, etc. to
detect incorrect device movement. Also, to prevent accidents related to incorrect signal output, or
incorrect operation, design your system so that all switches used to control vital machine operations are
operated via a control system that is separate from the PS-G.
