KROHNE OPTIWAVE 8300C Marine ATEX EN - Manual (Page 15)

ELECTRICAL CONNECTIONS
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OPTIWAVE 8300 C
www.krohne.com 02/2009 - 4000407102 - AD ATEX OPTIWAVE 8300 R02 en
3.6 Ex d [ia] equipment
3.6.1 General notes
Ex d [ia]-approved equipment have two separate compartments. The electronics in the
electronics block compartment are Ex ia-approved and the terminals compartment is Ex d-
approved.
3.6.2 How to connect the electrical cables
• Use only flameproof and Ex d-approved cable entries and plugs.
• If you use only one cable entry, seal the other one with an Ex d-approved plug.
• All Ex d-approved installations must agree with European standards EN 60079-1.
Figure 3-4: Compartments in Ex d [ia]-approved equipment
1 Electronics block (Ex ia) compartment
2 Terminal (Ex d) compartment
INFORMATION!
If you must open the electronics block compartment and remove the electronics blocks for
servicing, it is not necessary to disconnect the wires in the Ex d compartment.
INFORMATION!
The flamepath dimensions are better than the values specified in the European Standard
EN 60079-1 (minimum length 14.5 mm and maximum gap 118 µm).
INFORMATION!
Cable entries are supplied on customer demand. If you supply the cable entries, this part must
have a degree of ingress protection IP≥6x (EN 60529).
AD_ATEX_OPTIWAVE8300_EN_090407_4000407102_R02_PRT.book Page 15 Tuesday, April 7, 2009 5:07 PM