43266HSH MODBUS TRANSMITTER | PRESSURE/TEMPERATURE MULTIVARIABLE | OI/266HSHMT-EN REV. A
Important. This ATEX Category depends on the
application (see below) and also on the intrinsic safety
level of the transmitter supply (associated apparatus)
which can sometimes suitably be [ib] instead of [ia]. As it
is well known, the level of an intrinsic safety system is
determined by the lowest level of the various apparatus
used, i.e., in the case of [ib] supply, the system takes over
this level of protection.
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—
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Note: the transmitter can be connected to either [ib] or [ia]
supply (associated apparatus)certified [Ex ia]
Note for “Primary transducer”: see the certification for
exceptions
Application with Gas Application with Dust
Note: the protection is mainly assured by the “IP” degree
associated to the low power from supply. This can either be
[ia] or [ib]
Zone “0”
Zone “1”
Dangerous
medium
(process)
Tank
Zone “0” / Zone “1” sep-
aration element
Primary transducer
266 Tx
Category 1/2 Ga Ex ia
Zone “20”
Zone “21”
Dangerous
medium
(process)
Silo
266 Tx
Category 1/2 Da Ex ia
— T4: Temperature class of the transmitter
— T5: Temperature class of the transmitter
— T6: Temperature class of the transmitter
that provides inside separation elements to seal off the
shown on the relevant part of the sketches.
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