Emerson 2120 Quick Start Manual page 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

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

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

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.)

20

or

Reference

T class

T6

T5

T4

T3

Reference

Manual.

Process Temperature

176 °F (80 °C)

239 °F (115 °C)

302 °F (150 °C)

Manual.

Cable temperature rating

Above 185 °F (85 °C)

Above 212 °F (100 °C)

Above 275 °F (135 °C)

Above 320 °F (160 °C)

Temperature classes

T1, T2, T3, T4, T5

T1, T2, T3, T4

December 2016

Reference

T1, T2, T3