Emerson Rosemount 3490 Series Reference Manual page 18

Installation
January 2021
2. Do not mount the control unit on a structure that is subject to vibration, or in a
3. The fuse must only be replaced with the type specified.
4. If the equipment is likely to come into contact with aggressive substances, it is the
5. The user should not repair this equipment.
6. Terminal 30 (intrinsically safe earth/ground) of the panel mount control unit must
7. A mains-powered control unit must not be connected to a supply exceeding 250 V
8. A direct current (dc) powered control unit must not be connected to a supply
9. The intrinsically safe outputs of the control unit may be connected to certified
10. Cable between the control unit and transmitter should be shielded, twisted-pair
11. Cable runs should be separate from any high voltage or mains cables to avoid
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Product certifications
Specifications and reference data
18
position where damage may be caused by impact, thermal stress or liquid ingress.
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.
be connected to a high integrity earth/ground point.
For a wall mount control unit, it is recommended that Terminal 30 is connected to a
high integrity earth/ground point.
r.m.s. or dc, or to apparatus containing a source of voltage exceeding 250 V r.m.s.
or dc.
exceeding 30 Vdc or apparatus containing a source of voltage exceeding 30 Vdc.
equipment used in a hazardous area.
with the shield connected to terminal 3 (marked with earth symbol) on the control
unit. The shield should be left unconnected at the transmitter unless there is a
terminal specifically provided for this purpose.
crosstalk or interference.
Reference Manual
00809-0100-4841
Emerson.com/Rosemount