2
Essential Safety Precautions
All safety-related procedures stated in this document must be followed to operate the PS-A correctly and safely. Be sure to
read this and any related documents thoroughly to understand the correct operation and functions of the PS-A unit.
Safety Icons
Throughout this manual, these icons provide essential safety information for PS-A operation procedures requiring special
attention. These icons indicate the following levels of danger:
System Design
Indicates situations where severe bodily injury, death or major equipment damage
can occur.
Indicates situations where slight bodily injury or minor equipment damage can
occur.
Indicates actions or procedures that should NOT be performed.
Indicates actions or procedures that MUST be performed to ensure correct unit
operation.
Do not create PS-A touch panel switches that could possibly endanger the safety of personnel or
equipment.
A malfunction of the PS-A 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 PS-A.
Do not create PS-A 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 PS-A 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 PS-A 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.
