Use in potentially explosive atmospheres
IM/265Gx/Ax-EN-07 265Gx, 265Ax 15
2 Use in potentially explosive atmospheres
According to Directive 94/9/EC (ATEX):
When installing explosion-proof transmitters (electrical connection, grounding / equipotential
bonding, etc.), national regulations, DIN / VDE standards, explosion protection directives, and
the Ex test certificate of the device must be observed. The certified explosion-proof designation
for the transmitter is provided on the name plate.
2.1 Type-examination certificate/Declaration of conformity
For explosion-proof transmitter models, the EC-type-examination certificate or declaration of
conformity forms an integral part of these operating instructions.
2.2 Type of protection "intrinsic safety Ex i"
• Only intrinsically safe devices may be installed in the transmitter signal circuit. The signal
circuit can be interrupted while the transmitter is in operation (e.g., clamping/unclamping
signal lines).
• The housing may be opened during operation.
• Transmitters with and without remote seals and featuring type of protection "intrinsic safety
Ex i" may be directly integrated into the partition separating Zone 0 and Zone 1 (sensor
diaphragm in Zone 0, transmitter in Zone1), provided that the power is supplied via an
intrinsically safe circuit (Ex ia or Ex ib). (measuring ranges ≤ 400 mbar with Ex ia only)
• Test circuit (terminals "TEST +/-"): With type of protection "intrinsic safety", connections
should only be established to passive, intrinsically safe circuits. The category, explosion
group, and maximum values for U
o
, I
o
, and P
o
of the intrinsically safe test circuit can be
determined on the basis of the intrinsically safe signal circuit connected.
IMPORTANT (NOTE)
Please observe the rules governing interconnection.
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