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3M Dynapro ET 350 Monitor User’s Installation Guide
8
Distinctive features
of each model
All ET 350 monitor units have the standard features described above. The
distinctive features of each model are described below and summarized in
Table A.
ET 350R monitor (NEMA 4X panel gasket)
The ET 350R monitor has a UL Recognized component mark. It comes
with a gasket that mounts between the monitor and a wall or panel
(Figure 2).
Figure 2: NEMA 4X panel gasket (comes with ET 350R)
The ET 350R monitor is suitable for Pollution Degree 3 environments if
installed and tested with the panel gasket in an enclosure that meets
NEMA 4X/IP66 ratings. If the ET 350R monitor is not mounted in such an
enclosure or mounted without the gasket, the unit is suitable for Pollution
Degree 2 environments.
ET 350L2 monitor (no gasket or hatch)
The ET 350L2 monitor comes with neither a gasket nor a hatch. This
model is UL Listed for Pollution Degree 2 environments and can perform
as a stand-alone unit in a Pollution Degree 2 environment.
ET 350L3 (NEMA 4X hatch)
The ET 350L3 monitor comes with a NEMA 4X hatch (and extended hatch
cover) to seal both communication and power connections (Figure 3).
When properly installed with the materials supplied, the hatch provides a
NEMA 4X/IP66 seal on all sides and the monitor is UL Listed for
Pollution Degree 3 environments.
The ET 350L3 monitor may be used as a stand-alone unit in Pollution
Degree 3 environments.