Basic Components Of The System; Rack With 4 Slots - Siemens SIMATIC CN 4100 Equipment Manual

System overview

3.3 Basic components of the system

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3.3 Basic components of the system
3.3.1

Rack with 4 slots

Definition
The core component of the SIMATIC CN 4100 communication system is the rack.
The four-slot rack provides the following:
• Two slots for CPU modules.
– Redundant operation: Two CPUs.
– Simple operation: A CPU in the first slot.
• Two slots for communications modules.
• Power supply connections
• Network connections
Design of the front panel
The following figure shows the front panel of the rack:
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Rack:
CPU modules:
Communications modules:
Contains slots for the CPU modules and communications
modules.
Contains terminal points.
Can be installed individually or as a redundant pair. CPUs
are plugged into the rack.
Optional modules with additional functions. These can al‐
so be installed individually or as a redundant pair. Com‐
munications modules are plugged into the rack.
Equipment Manual, 10/2021, A5E50871363-AA
CN 4100 Communication System