Tools And Tightening Torques; Dimensional Diagrams; Dimension Drawings Of The Mounting Rails - Siemens Simatic CFU Commissioning Manual

A.3.2

Tools and tightening torques

Fastening/unfastening components
Component
Mounting rail
CFU
BusAdapter
Cables on the plugs
You can find additional in‐
formation on this in the sec‐
tion "Cable cross-sections
and wire end ferrules
(Page 45)".
Shield connection for proc‐
ess cable (shield clamp)
CFU in the CFU enclosure
Cover screws
Mounting rail
Cable glands
(connection thread of the
cable gland)
Cable glands
(cap nuts)
Functional earth
Pressure compensation el‐
ement
A.4

Dimensional diagrams

A.4.1

Dimension drawings of the mounting rails

Dimensions for the drill holes
Mounting rails can be ordered in the lengths 483 mm and 2000 mm.
SIMATIC CFU
Commissioning Manual, 07/2018, A5E39252870-AC
Fastening/unfastening
Drill hole: Diameter 6.4 mm
Screw M6
Fixing screws on both sides of the
CFU
Screw is located in the BusAdapter
Fixing screw on the screw terminal
Stranded wires without wire end fer‐
rule with push-in terminal
Spring terminals
M6
(Screws are fitted in the cover)
Drill hole: Diameter 6.4 mm
Screw M6
M20x1.5:
approved for cable diameters from 7
mm to 13 mm (with reducing insert 4
mm to 8mm)
M20x1.5 with gasket ring
Functional earth on the enclosure
(left part of the enclosure without pen‐
etration of its wall - cross-section acc.
to EN 60079‑14)
M12
Tool
Wrench for screw M6
Screwdriver TORX T15 or
with 3 to 3.5 mm blade width
Screwdriver
with 3 to 3.5 mm blade width
Screwdriver
with 3 to 3.5 mm blade width
Screwdriver
approx. 3 mm blade width
Not required
Screwdriver PH2 or
with 9 mm blade width
Wrench for screw M6
Wrench for SW24 cable
glands
Wrench for SW24 cable
glands
Screwdriver 8 mm blade
width
Wrench for screw SW17
Appendix
A.4 Dimensional diagrams
Tightening torque
4 Nm to 6 Nm
0.5 Nm
0.25 Nm
min 0.4 Nm / max
0.5 Nm
Not applicable
Not applicable
2.5 Nm to 3 Nm
Pre-assembled
Preassembled (2.3 Nm)
1.5 Nm
2.5 Nm to 3 Nm
Pre-assembled (1 Nm)
149