Emerson Rosemount 936, Справочное руководство

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5.4.2 Special conditions for safe use from ATEX IECEx
certificate
The dimensions of the flameproof joints differ from the relevant minimum or maximum
values required by Table 2 of IEC/EN 60079-1: 2007 for IIB + H
2
, as detailed in Table 5-3 .
Table 5-3: Flamepaths
Flamepath description Type of joint Minimum width "L" in
inches (millimeters) Maximum gap "i
c
" in inches
(millimeters)
Cylindrical section of spigot
(both ends of Ex d
compartment) Cylindrical 0.59 (15) 0.003 (0.08)
1.2-in. (30 mm) diameter
window fitted against
enclosure Flanged 0.42 (10.7) 0.001 (0.02)
1.6-in. (39.5 mm) diameter
window fitted against
enclosure Flanged 0.39 (10) 0.001 (0.02)
• Gaps, "i
c
", should not be modified to be any larger, and widths, "L", should not be
modified to be any shorter than the values in Table 5-3 .
• Connections to the intrinsically safe (I.S.) port on the side of the detector enclosure
should be made using equipment that maintains the intrinsically safe levels of
protection.
• The Um should be installed in accordance with one of the following:
— The Um is 18 to 32 Vdc in a SELV/PELV system.
— Via a safety isolating transformer, complying with the requirements of IEC
61588-2-6 or technically equivalent standard.
— Directly connected to apparatus, complying with IEC 60950, IEC 61010-1, or
technically equivalent standard.
— Fed directly from cells or batteries.
• If the product is to be used as a safety related device, an appropriate independent
certification, would be required meeting all the requirements.
5.4.3 North American conditions of acceptability from
certificate CSA 80023016
Conditions for Canadian installations
1. The dimensions of the flameproof joints are other than the relevant minimum or
maximum values required by Table 2 of CAN/CSA-C22.2 No. 60079-0:19 Ed. 4 for
IIB + H2, as detailed below:
Reference Manual Installation
00809-0100-4036 October 2021
Rosemount 936 37