Emerson Rosemount 3490 Series, Справочное руководство

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• The mass of the mains powered unit is 3.5 kg, and the dc powered unit is 3.1 kg. To
conform with safety requirements, the wall on which the unit is mounted should be
capable of supporting four times this weight.
• It is not necessary, or advisable, to remove the upper part of the unit housing that
contains the LCD display and keypad. There are no user serviceable parts inside. The
unit must not be modified in any way.
• Control units are not supplied with cable entries for connections to the field mounted
transmitter or the mains power supply. However, the Rosemount 3493 Control Unit
has a download socket factory pre-fitted.
• It is the responsibility of the user to ensure that cable glands and connection to the
control unit are in accordance with the local or national standards. To maintain the
type 4X rating of the enclosure, type 4X connections must be used.
3.3 Mounting the control unit
3.3.1 Mounting the panel version
Procedure
1. Unpack the two screw clips provided.
2. Identify the lugs (protrusions) in the recesses on each side of the control unit.
(Ignore the recesses on the top and bottom of the control unit).
3. Holding the screwdriver-slot-end of the threaded spindle of one of the screw
clamps and looking at the control unit rear, engage a screw clamp frame onto the
control unit side (see
Figure 3-4 ) and see how the four steel lugs (protrusions) of the
screw clamp frame engage with the lugs of the control unit. Gently pull the screw
clamp for the lugs to engage with each other.
Reference Manual Installation
00809-0100-4841 January 2021
Emerson.com/Rosemount 21