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Rosemount 848T Bedienungsanleitung Seite 20

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January 2015
20
Quick Start Guide
IB INMETRO Intrinsic Safety
Certificate: NCC 12.1156X
Standards: ABNT NBR IEC 60079-0:2008 Versão corrigida 2011, ABNT NBR IEC
60079-11:2009, ABNT NBR IEC 60079-26:2008 Versão corrigida 2009,
ABNT NBR IEC 60079-27:2010
Markings: Ex ia IIC T4(-50 °C
≤ T
a
≤ +60 °C)
Special Conditions for Safe Use (X):
1. The equipment must be installed in an enclosure that provides a degree of
protection of at least IP20 and which is appropriate to the application specified
in ABNT NBR IEC60079-0.
2. The equipment is not capable of withstanding the dielectric strength test of
500 V according to item 6.3.12 of ABNT NBR IEC60079-1, this should be
considered in the installation, see installation manual.
N2 INMETRO Intrinsic Safety Zone 2
Certificate: NCC 12.1182X
Standards: ABNT NBR IEC 60079-0:2008 Versão corrigida 2011,
ABNT NBR IEC 60079-11:2009
Markings: Ex ic IIC T5(-40 °C
≤ T
a
≤ +65 °C) Gc
Special Conditions for Safe Use (X):
1. The equipment must be mounted within an enclosure that meets at least the
degree of protection IP54, with material and manufacture covered by a quality
certificate. If the enclosure is non-metallic, the enclosure must have a surface
resistance less than 1 GΩ. If the enclosure is made of zirconium alloy, the
enclosure must be protected against impact and friction when installed.
2. Provision must be made, external to the equipment, to ensure that the supply
voltage (42.2 Vdc) is not exceeded by transient disturbances of more than
40%.
3. The maximum ambient temperature will be restricted to lowest temperature
rating of the equipment, cables, cables glands or plugs.
4. The electric circuit is connected directly to ground, this should be taken into
account when installing the equipment.
Table 11. Entity Parameters
Fieldbus
(input)
Sensor field terminal
(output)
U
i
= 17.5 V U
O
= 12.5 V
I
i
= 380 mA I
O
= 4.8 mA
P
i
= 5.32 W P
O
= 15 mW
C
i
= 2.1 nF C
O
= 1.2 μF
L
i
= 0 L
O
= 1 H
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