Cabling Guidelines; Coupler Modules; Comparison Of Coupler Modules For Networks - WAGO 750 Series Manual

Cabling guidelines

"Structured Cabling" specifies general guidelines for network architecture of a
LAN, establishing maximum cable lengths for the grounds area, building and
floor cabling.
Standardized in EN 50173, ISO 11801 and TIA 568-A, "Structured Cabling"
forms the basis for a future-orientated, application-independent and cost-
effective network infrastructure.
The cabling standards define a domain covering a geographical area of 3 km
and for an office area of up to 1 million square meters with 50 to 50,000
terminals. In addition, they describe recommendations for setting up of a
cabling system.
Specifications may vary depending on the selected topology, the transmission
media and coupler modules used in industrial environments, as well as the use
of components from different manufacturers in a network. Therefore, the
specifications given here are only intended as recommendations.

5.2.3 Coupler Modules

There are a number of hardware modules that allow for flexible arrangement
for setting up an ETHERNET network. They also offer important functions,
some of which are very similar.
The following table defines and compares these modules and is intended to
simplify the correct selection and appropriate application of them.
Module
Repeater
Bridge
Switch
Hub
Router
Gateway
Tab. 5-2: Comparison of Coupler Modules for Networks
WAGO-I/O-SYSTEM 750
ETHERNET TCP/IP
Network Architecture – Principles and Regulations
Characteristics/application
Amplifier for signal regeneration, connection on a physical level. 1
Segmentation of networks to increase the length.
Multiport bridge, meaning each port has a separate bridge
function.
Logically separates network segments, thereby reducing network
traffic.
Consistent use makes ETHERNET collision-free.
Used to create star topologies, supports various transmission
media, does not prevent any network collisions.
Links two or more data networks.
Matches topology changes and incompatible packet sizes (e.g.
used in industrial and office areas).
Links two manufacturer-specific networks which use different
software and hardware (i.e., ETHERNET and Interbus-Loop).
ETHERNET • 131
ISO/OSI
layer
2
2 (3)
2
3
4-7