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Appendix E Hazardous area ratings and considerations
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266 MODBUS® multivariable transmitter User manual 2105216 Rev. AB
Appendix E
Hazardous area ratings and considerations
E.1
Ex Explosion protection aspects (Europe and International)
According to ATEX Directive (European Directive 94/9/EC of March 23, 1994) and applicable European standards which assure
compliance with Essential Safety Requirements, the following ratings apply to the transmitters with or without integrated digital
display.
— EN 60079-0: “Explosive atmospheres - Part 0: Equipment - General requirements”
— EN 60079-1: “Explosive atmospheres - Part 1: Equipment protection by flame-proof enclosures “d””
— EN 60079-15: “Explosive atmospheres - Part 15: Equipment protection by type of protection “n””
— EN 60079-26: “Explosive atmospheres - Part 26: Equipment with Equipment Protection Level (EPL) Ga”
— EN 61241-0: “Electrical apparatus for use in the presence of combustible dust - Part 0: General requirements”
— EN 61241-1: “Electrical apparatus for use in the presence of combustible dust - Part 1: Protection by enclosures “tD””
— EN 60529: “Degrees of protection provided by enclosures (IP Code)”
The transmitters are certified for the following gas groups, categories, and media in dangerous atmosphere, temperature classes,
and types of protection. The sketches located below are examples of applications.
E.1.1
Type of protection: "Ex d" Certifications ATEX (Code E2) and IECEx (Code E9)
Code E2 Rating: ATEX II 1/2 G Ex d IIC T6 and ATEX II 1/2 D Ex tD A21 IP67 T85 °C Ta = -50 °C to +75 °C
FM Approvals Certificate: FM09ATEX0023X, The meaning of the ATEX code is as follows:
— II: Equipment Group for hazardous surface areas (not mines)
— 1/2: Category - This means the transmitter is suitable for use in the partition to category 1 (e.g., sensor category 1 / transmitter
category 2) (see application sketch).
— G: Gas (dangerous media)
— D: Dust (dangerous media)
— Ex d: Flame-proof enclosure
— IIC: Explosion group gases
— T6: Temperature class of the transmitter (corresponds to 85 °C maximum) with an ambient temperature from -50 °C to 75 °C.
— Ex tD: Dust protected Flame-proof enclosure
— A21: Dust Intended Zone of Installation
— T85 °C: Maximum surface temperature of the transmitter housing at an ambient temperature Ta from -50 °C to +75 °C for dust
(not for gas) with a dust layer up to 50 mm thick
— IP67: For protection type, the first characteristic numeral indicates the protection of the integrated electronics against ingress of
solid foreign objects including dusts.
The assigned “6” means a dust-tight enclosure (no ingress of dust). The second
characteristic numeral indicates the protection of the integrated electronics against ingress of water.
The assigned “7”means a
water-protected enclosure against a temporary immersion in water under standardized conditions of pressure and time.
IMPORTANT NOTES:
The number printed by the CE mark on the safety label identifies the Notified Body which has
responsibility for the surveillance of the production.
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