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5
WARNING!
Risk of explosion
A risk of explosion exists if the enCore FC (FC1 or MC1) is
improperly assembled and connected!
•
The enCore FC must be installed outside of Ex zones 0, 1
and 2.
•
Assemblies which are authorized as associated category ib
electrical equipment with intrinsically safe electrical circuits in
accordance with EN 60079-11 can be installed in the enCore
FC, e.g. input boards with the label ExMFE5. The enCore FC
is therefore suitable for connecting to transmitters, pulse and
signal sensors that are located in the potentially explosive
area e.g. in zone 1. A mixed connection of intrinsically safe
and non-intrinsically safe circuits is not permitted for these
assemblies.
•
Only measurement transmitters and pulse sensors that follow
at least the requirements of the intrinsically safe protection
class [Ex ib Gb] II C may be connected to the ExMFE5
assembly terminals provided for that purpose.
•
When using input boards of ExMFE5 type, it is not permitted
(according to the EC type examination certificate ATEX) to
include more than one ExMFE5 board (i.e. more than one
associated apparatus) into the same intrinsically safe circuit.
•
All signals from the potentially explosive area (zone 0,
zone 1, zone 2) must be regulated using suitable Ex isolators,
if they are connected to some other assembly group that is
not the input board ExMFE5
•
The regulations in the relevant standards, especially
EN 60079-0, EN 60079-11, EN 60079-17 and EN 60079-25,
must be obeyed unconditionally.
enCore FC
Operating Instructions
Design and Function
Page 41 of 120
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