enCore FC1
Operating Instructions
Page 19 of 97
3 Safety
3.1 General Safety Instructions
WARNING!
Risk of explosion
A risk of explosion exists if the FC1 is improperly assembled
and connected!
•
The FC1 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 FC1,
e.g. input boards with the label ExMFE5. The FC1 is there-
fore 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 of the in-
trinsically safe protection class [Ex ib Gb] II C may be
connected to the ExMFE5 assembly terminals provided for
that purpose.
•
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.