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Rosemount 848T Bedienungsanleitung Seite 17

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Quick Start Guide
17
January 2015
NC ATEX Type n (without enclosure)
Certificate: Baseefa09ATEX0094U
Standards: EN 60079-0:2006, EN60079-15:2005
Markings: II 3 G Ex nA nL IIC T4(-50 °C
≤ T
a
≤ +85 °C), T5(-50 °C ≤ T
a
≤ +70 °C)
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 ATE X Dust
Certificate: BAS01ATEX1315X
Standards: EN 50281-1-1:1998
Markings: II 1 D T90 (-40 °C
≤ T
a
≤ +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 milliamps 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.
Table 8. 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 μF
L
O
= 1 H
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