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5 Installation
Guideline
Safety Considerations
Please follow all applicable local and national codes to ensure maximum safety of the equipment and personnel.
The installation and operational environment must be maintained per the latest revision of these codes.
You are responsible to determine the codes to be followed and to verify the compliance of equipment, installation,
and operation with the latest revision of these codes.
It is an absolute must to follow all applicable sections of:
The National Fire Code
The National Electrical Code (NEC)
The National Electrical Manufacturer's Association (NEMA) codes
Safety Guidelines
Safety is the most important element of a proper system installation. Adhering to these safety considerations
ensures the safety of yourself and others, as well as the condition of your equipment. We recommend reviewing
the following safety guidelines:
1) Disconnecting Main Power
The main power switch should be easily accessible to the operators and maintenance personnel. It is important to
make sure that all other sources of power including pneumatic and hydraulic are de-energized before starting the
work on a machine or process controlled by an EZ3 Series TOUCHPLC.
2) Safety Circuits
Most of the machines are installed with safety circuits such as limit switches, emergency stop push buttons , and
interlocks. These circuits should always be hardwired directly to the EZ3 Series TOUCHPLC. These devices must be
wired in series so that when any one device opens, the PLC is automatically de-energized. This removes power to
the machine. These circuits should not be altered in any case, since this could result in serious injury or damage to
the machine.
3) Fail-Safe Operation
Our products are not fault-tolerant. They are not designed or intended for use as online control equipment in
hazardous environments requiring fail-safe performance, such as in operation of nuclear facilities, aircraft
navigation or communication systems, air traffic control, direct life-support machines, weapons systems, clutch
control systems on presses, in which the failure of the product could lead directly to death, personal injury or
severe physical or environmental damage. External fail-safe and/or redundant components are required to make
your control system fail-safe.
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