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S5-1OOU
3.1.2 Multi-Tier Expansion
If it is not possible to have all of the modules located on one tier, you can expand the configuration
up to four tiers. You may use a maximum of 16 bus units. It does not matter how many bus units
are mounted on a tier. You need one interface module per tier to interconnect the tiers.
Install an interface module as you would install a bus unit. You must connect each interface module
to the last bus unit via the ribbon cable.
Use the IM 315 interface module for two-tier configurations. The IM 315 consists of two modules
permanently connected to each other via a 0.5-m (20-in. ) cable.
Use the IM 316 interface modules for multi-tier configurations. Use the 712-8 connecting cable to
connect the IM 316 interface modules (Order No. 6ES5 712-8...).
The standard mounting rails must have a common reference potential if they are mounted in
different cabinets.
Figure 3-4. Interconnecting Tiers with Interface Modules (6ES5 316-8 MA12)
EWA 4NEB 8126120-02
Installation Guidelines
3-5
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