Installation and Commissioning
247
7SS52 V4 Manual
C53000-G1176-C182-1
fiber-optic cables are connected to the central unit, the configured order of the bay
units must be followed. The connections on the back of the central unit are marked
(Bild 2-6, page 22).
The surface-mounted housing has bulkhead cable glands. These can be found at
the underside of the housing. The bulkhead cable glands correspond to the degree
of protection of the housing and provide strain relief for the cables.
7.1.2 Bay Unit
Panel flush mount-
ing or cubicle
mounting
Swing the two labeling strips at the housing cover open. That exposes the 4 elon-
gated holes in the mounting bracket.
Insert the bay unit into the panel cutout or the cubicle frame and secure it with four
mounting screws (see mechanical dimensions in Chapter 9.3.2, page 322 to 324).
Connect a solid low-ohmic and low-inductive operational earthing on the lateral
earthing surface with at least a M4 screw. For this earthing strips DIN 72333 Form A
are suitable. Connect the strip to the protective earth of the panel.
Connect the electric lines via the double-leaf-spring crimp contacts or the screw ter-
minals of the modular terminal blocks on the back of the bay unit. Pay attention to
the identification of the modular terminal blocks.
(Figure 2-8, page 24).
Connect the bay units to the central unit by optical fibres. For this, use optical fibres
with prefabricated ST plugs. Provide a suitable strain relief.
Panel surface
mounting
Mount the bay unit 7SS523 with 4 screws each to the panel (for mechanical dimen-
sions see Chapter 9.3.2, page 322).
Connect a solid low-ohmic and low-inductive operational earthing on the lateral
earthing surface with at least a M4 screw. For this earthing strips DIN72333 Form
A are suitable. Connect the strip to the protective earth of the panel.
Connect the electric lines via the screw terminals. You can use solid conductors or
stranded conductors with end sleeves.
Connect the bay units to the central unit by fiber-optic cables. For this, use fiber-
optic cables with prefabricated ST plugs. Provide a suitable strain relief.
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