Essential safety precautions, Safety icons, System design – Proface APL3000B - Node Box PC User Manual

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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 equip-

ment. A malfunction of the PS-A unit, its I/O unit(s), cable(s), or other related equipment can cause unex-

pected 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 dam-

age.

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.

Do not use the PS-A 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.

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