Emerson 2120 Quick Start Manual page 21

December 2016

4. Suitably trained personnel shall carry out installation in accordance with the

applicable code of practice.

5. The user should not repair this equipment.

6. 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

7. 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

b. Under certain extreme circumstances, the non-metallic parts incorporated

in the enclosure of the Rosemount 2120 may generate an ignition-capable

level of electrostatic charge. Therefore, when they are used for applications

that specifically require group II equipment, the Rosemount 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

Rosemount 2120 shall only be cleaned with a damp cloth.

8. Technical data:

a. I.S. approval: Class 1 Division 1 Groups ABC and D, Class 1 Zone 0 AEx ia IIC

Non-Incendive Approval: Class 1 Division 2 Groups ABC and D

T5 (Ta = -40 °F to +176 °F [-40 °C to +80 °C])

T4 (Ta = -40 °F to +239 °F [-40 °C to +115 °C])

T3 (Ta = -40 °F to +302 °F [-40 °C to +150 °C])

Ta = the higher of the process or ambient temperature.

b. Input parameters:

Rosemount 2120 with NAMUR electronics:

Vmax=15 V, Imax=32 mA, Pi=0.1 W, Ci=211 nF, Li=0.06 mH

Rosemount 2120 with 8/16 mA electronics:

Vmax=30 V, Imax=93 mA, Pi=0.65 W, Ci=12 nF, Li=0.035 mH

c. Temperature:

Process (Tp) -40 °C to 150 °C

External (Ta) -40 °C to +80 °C

(up to Tp=80 °C, reducing linearly to 50 °C at Tp=150 °C)

d. Materials:

See the Rosemount 2120

Product Data Sheet

Quick Start Guide

or

Reference

Manual.

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