Emerson 2120 - Page 20

December 2016
20
Quick Start Guide
c. Pressure: Must not exceed the rating of the coupling/flange fitted.
d. For electrical details and pressure ratings, see the Rosemount 2120
Product Data Sheet or Reference Manual.
10. Cable selection:
a. It is the responsibility of the user to ensure that suitably temperature rated
cable is used. The table below is a guide to selection:
10.12 Instructions for hazardous area installations (I5 and I6)
Model numbers covered:
2120***H*I5A*, 2120***K*I5D*,
2120***H*I6A*, 2120***K*I6D*
(“*” indicates options in construction, function and materials.)
The following instructions apply to equipment covered by FM and CSA approvals:
1. The intrinsically safe approved Rosemount 2120 may be used in hazardous
locations with flammable gases and vapors Class 1 Division 1 Groups A, B, C,
and D, and Class 1 Zone 0 Group IIC when installed in accordance with control
drawings 71097/1154, 71097/1314, 71097/1179, or 71097/1315 in the
Rosemount 2120 Reference Manual
.
2. The non-incendive approved Rosemount 2120 may be used in hazardous
locations with flammable gases and vapors Class 1 Division 2 Groups A, B, C,
and D when installed in accordance with control drawings 71097/1154,
71097/1314, 71097/1179, or 71097/1315 in the Rosemount 2120 Reference
Manual.
3. The apparatus electronics is only certified for use in ambient temperatures in
the range of -40 °C to +80 °C. 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 condition of the approval that the temperature of the electronics
housing is in the range of -40 °F to +176 °F (-40 to +80 °C). 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.)
T class Cable temperature rating
T6 Above 185 °F (85 °C)
T5 Above 212 °F (100 °C)
T4 Above 275 °F (135 °C)
T3 Above 320 °F (160 °C)
Process Temperature Temperature classes
176 °F (80 °C) T1, T2, T3, T4, T5
239 °F (115 °C) T1, T2, T3, T4
302 °F (150 °C) T1, T2, T3