Rosemount 2120, Справочное руководство

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Reference Manual
00809-0100-4030, Rev DA
June 2007
Rosemount 2120
B-16
IECEx Intrinsically Safe Approval
I7 Certificate: IECEx SIR 06.0070X
Intrinsically Safe and Dust:
Ex ia IIC T5, Ex iaD 20 T85 (T
amb
-40°C to +80°C)
Ui=15 V, Ii=32 mA, Pi=0.1 W, Ci=12 nF, Li=0.06 mH
NOTE
A NAMUR isolating amplifier must be used for intrinsic safety.
Instructions specific to hazardous area installations
1. The 2120 I.S. may be used in a hazardous area with flammable gases and vapors with
apparatus groups IIC, IIB and IIA and with temperature classes T1, T2, T3, T4 and T5.
2. The apparatus electronics is only certified for use in ambient temperatures in the range
of -40ºC to +80ºC. It should not be used outside this range. However, the switch may be
located in the process medium which may be at a higher temperature than the
electronics but must not be higher than the Temperature Class for the respective process
gas/medium.
It is a special condition of the certification that the temperature of the electronics housing
is in the range of -40ºC to +80ºC. It must not be used outside this range. It will be
necessary to limit the external ambient temperature if the process temperature is high.
(See Technical Data below.)
3. Suitably trained personnel shall carry out installation in accordance with the applicable
code of practice.
4. The user should not repair this equipment.
5. If the equipment is likely to come into contact with aggressive substances, it is the
responsibility of the user to take suitable precautions that prevent it from being adversely
affected, thus ensuring that the type of protection is not compromised.
Aggressive Substances – e.g. acidic liquids or gases that may attack metals or
solvents that may affect polymeric materials.
Suitable Precautions – e.g. regular checks as part of routine inspections or establishing
from the material’s data sheet that it is resistant to specific chemicals.
6. If the enclosure is made of an alloy or plastic material, the following precautions must be
observed:
a. The metallic alloy used for the enclosure material may be at the accessible surface of
this equipment; in the event of rare accidents, ignition sources due to impact and
friction sparks could occur. This shall be considered when the 2120 is being installed
in locations that specifically require Zone 0 equipment.
b. Under certain extreme circumstances, the non-metallic parts incorporated in the
enclosure of the 2120 may generate an ignition-capable level of electrostatic charge.
Therefore, when they are used for applications that specifically require group II,
category 1 equipment, the 2120 shall not be installed in a location where the external
conditions are conducive to the build-up of electrostatic charge on such surfaces.
Additionally, the 2120 shall only be cleaned with a damp cloth.
Process Temperature Temperature classes
80°C T1, T2, T3, T4, T5
115°C T1, T2, T3, T4,
150°C T1, T2, T3