Emerson Rosemount 848T, Reference Manual, Page: 81 / 136

73
Reference Manual
00809-0100-4697, Rev GA
Appendix B: Product Certifications
November 2014
Product Certificates
Special Conditions for Safe Use (X):
1. The component must be installed in a suitable component certified enclosure
that provides a degree of protection of at least IP54 and meets the relevant
material and environmental requirements of EN 60079-0:2006 and EN
60079-15:2005.
2. Provision must be made, external to the apparatus, to ensure the rated voltage of
the apparatus supply is not exceeded by transient disturbances of more than
40%.
3. The electrical circuit is connected directly to earth; this must be taken into
account when installing the apparatus.
Note
The 848T may also be installed in an external energy limited circuit as Ex nL IIC. In this case the
following parameters apply
ND ATEX Dust
Certificate: BAS01ATEX1315X
Standards: EN 50281-1-1:1998
Marking
II 1 D T90 (-40 °C
≤
Ta
≤
+65 °C); IP66
Special Conditions for Safe Use (X):
1. The user must ensure that the maximum rated voltage and current (42.4 volts,
22 milliamp DC) are not exceeded. All connections to other apparatus or
associated apparatus shall have control over this voltage and current equivalent
to a category “ib” circuit according to EN 50020.
2. Component approved EEx e cable entries must be used which maintain the
ingress protection of the enclosure to at least IP66.
3. Any unused cable entry holes must be filled with component approved EEx e
blanking plugs.
4. The ambient temperature range of use shall be the most restrictive of the
apparatus, cable gland or blanking plug.
B.5 International
I7 IECEx Intrinsic Safety
Certificate: IECEx BAS 09.0030X
Standards: IEC 60079-0:2011, IEC60079-11:2011
Markings: II 1 G Ex ia IIC T4 Ga (– 50 °C
≤
T
a
≤
+ 60 °C)
Table B-4. Baseefa Entity Parameters
Power/Bus (Input)
Sensor Field Terminal
(Output)
U
i
= 42.4 V U
o
= 12.5 V
C
i
= 2.1 nF I
o
= 2.5 mA
L
i
= 0 C
o
= 1000 mF
- L
o
= 1 H