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F2-JB-#.I, F*-JB-#.*
Installation/Commissioning
8
Installation/Commissioning
The following section applies to all fieldbus junction boxes.
8.1
General
Fieldbus junction boxes may only be operated by trained and qualified personnel in
accordance with this documentation.
Take the cable parameters to be used from the installation instructions of the corresponding
fieldbus system.
Applies to fieldbus junction boxes with screw terminals: The insulation stripping length of
■
the leads is 9 mm.
If stranded conductors are used, the conductor ends must be protected from fraying, for
■
instance by using wire end ferrules.
The tightening torques of the screw terminals and the cable glands must be observed
■
when connecting the fieldbus transmission lines.
Tightening Torques
Tightening torque of the screw terminals (if present): 0.4 Nm ... 0.5 Nm
■
Tightening torques of the cable glands: The tightening torques of the cap nuts depend on
■
the cable used and must therefore be determined by the user.
The following information can serve as a rough guideline:
Junction Box Type
F*-JB**-...CG
F*-JB**-...CGB
F*-JB**-...CGS
F*-JB**-...CGAB
Table 8.1
Note!
Reference values for tightening torques
The tightening torques listed in the table above are valid for fieldbus junction boxes for which
identical cable glands are used for both trunks and spurs. It is possible for fieldbus junction
boxes to be installed with different connection types for trunks and spurs. The tightening
torques listed above are valid independently of whether cable glands are used for the trunk or
the spurs or both.
Note!
Ensure the degree of protection - cap nuts
Tighten the cap nuts firmly. Note that the excessive tightening of the cap nuts can impair the
degree of protection.
Fieldbus junction boxes with plug connections are always powered via a plug.
Only hand-tighten the cap nut of the power plug.
Secure any unused plugs in such a way that the degree of protection is maintained.
Fieldbus junction boxes with cable glands are powered through the input, that is, through the
second cable gland from the right (as seen from above).
To maintain the degree of protection, all unused cable glands must be plugged with a suitable
sealing plug or replaced by a suitable stopping plug. The sealing and stopping plugs must be
suitable for this application.
18
Reference values for tightening torques
Cap nut
2.5 Nm
4.11 Nm
4.11 Nm
22 Nm
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