Daisy 4823DH, Руководство пользователя

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4823DH User Manual
D004-000010 1
Introduction
Thank you for selection a Daisy solution for your hazardous area operator interface needs.
This manual contains drawings and component locations for installing and setting up Daisy Data flat
panel operator interface systems. In addition, Daisy Data provides warnings, precautions, and
methods to ensure that the electronic systems are safe for hazardous areas. This explains the theory
behind the unique product and services provided by Daisy Data.
Should you have any inquiries or concerns, please contact Daisy.
Applicable Hazardous Locations Safety Methods
2.1 Division 2: Non-Incendive Protection
The NEC defines a non-incendive circuit as:
“…one other than field wiring, in which any arc or thermal effect
produced under intended operating conditions of the equipment, is not
capable, under specified test conditions, of igniting the flammable gas-
air, vapor-air or dust-air mixture.”
Non-incendive circuit designs do not take component failure into consideration, and therefore
have a reduced safety level compared to IS circuit design. They can be worked on while
energized without a hot-work permit.
Non-incendive devices can be rated for Division 2 as well as Zone 2 areas without a purge
control or other protective device.
Please note that DAISY’s systems have been fully tested under the supervision of Factory
Mutual (FM) to ensure compliance with the standards, and are approved as non-incendive
devices for all Division 2 areas.
*Part of the NEC definition of Division 2 areas.