Calculation Of Space Requirements; Use In A Potentially Explosive Atmosphere - Emerson PACSystems RSTi-EP User Manual

User Manual
GFK-2958J

Calculation of Space Requirements

The space requirements for a RSTi-EP station with n modules (horizontal installation) is
calculated as follows:
Height:
Width:
For vertical installation interchange height and width. When calculating the width, 4.5 mm
(0.18 in) for the must be added for the end bracket.
3.3

Use in a Potentially Explosive Atmosphere

If the RSTi-EP is used in a potentially explosive atmosphere rated as Zone 2, the housing
must meet the requirements of explosion protection type Ex n or Ex e and protection class
IP54. Sensors and actuators that are in Zone 2 or in a safe zone can be connected. All cable
glands on the housing must be approved for Ex e.
Figure 15: Use in a Potentially Explosive Atmosphere
Configuration
120 mm (4.72 in)
+ 40 mm (2 x 1.57 in)
= 200 mm (7.87 in)
8 mm (1.57 in)
+ 52 mm (2.05 in)
+ n x 11.5 mm (0.45 in)
+ 11.5 mm (0.45 in)
+ 2 x 20 mm (0.79 in)
= 111.5 mm (4.39 in) + n x 11.5 mm (0.45 in)
clearance at top and bottom
end bracket
network adapter
n modules
end plate and end bracket
distances to the sides
Chapter 3
Oct 2019
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