Emerson PACSystems RSTi-EP - Installation Sequence; Arrangement of SIL Modules; Preparation and the Required Tool

User Manual Section 6
GFK-2958L May 2021
Installation 406
+ 52 mm (2.05”)
bus network adapter
+ n x 11.5 mm (0.45”)
n modules
+ 11.5 mm (0.45”)
end plate and end bracket
+ 2 x 20 mm (0.79”)
distances to the sides
= 111.5 mm (4.39”) + n x 11.5 mm (0.45”)
For vertical installation interchange height and width.
When calculating the width for vertical installation, 4.5 mm (0.18”) must be added for the
end bracket.
6.1.9 Installation Sequence
A RSTi-EP station may only be installed in this sequence (starting from the left/bottom):
•
End bracket
•
Bus network adapter
•
Up to 64 active modules
•
End plate and end bracket
If the station has already been configured, proceed to the corresponding installation
drawing. If you are configuring the station yourself, observe the following instructions:
•
Observe the maximum current carrying capacity (refer to Section, Current Demand and
Power Supply).
•
Furthermore, the modules may be arranged in any sequence. In order to configure the
station as clearly as possible, it is recommended to arrange the modules according to
their function.
6.1.10 Arrangement of SIL Modules
An EP-19xx module can be positioned anywhere in the RSTi-EP station. All of the following
output modules up to the next EP-7641 module are safely disconnected (safety segment).
Multiple EP-19xx modules / safety segments can be set up in a single station.
Note: When using RSTi-EP EP-19xx modules, also refer to the Modules for Functional Safety
Manual (GFK-2956).
6.1.11 Preparation and the Required Tool
The DIN rail must already be installed. To mechanically install the RSTi-EP station, you will
need a 3-mm screwdriver.
•
Lay out the modules in the intended sequence.
•
Check whether the DIN rail feet can be moved on both end brackets. If necessary, loosen
the mounting screw until the DIN rail feet can be moved freely.
•
If not done yet, fit an earth terminal to the DIN rail.