Technical data

ETHERNET • 111
Network Architecture – Principles and Regulations
WAGO-I/O-SYSTEM 750
ETHERNET TCP/IP
sensor and actuator
connection
fieldbus
connection
DC 24V
connection
Fig. 5-1. Connection Principle of a Fieldbus Node for a Network Architecture 1Netwerkknotene
Fieldbus communication between master application and fieldbus controller
takes place using either the MODBUS TCP protocol or Ethernet/IP.
5.2.1 Transmission Media
General ETHERNET transmission standards
For transmitting data the ETHERNET standard supports numerous
technologies with various parameters (e.g., transmission speed, medium,
segment length and type of transmission).
1Base5 Uses a 24 AWG UTP (twisted pair cable) for a 1Mbps baseband signal for
distances up to 500 m (250 m per segment) in a physical star topology.
10Base2 Uses a 5 mm 50 Ohm coaxial cable for a 10Mbps baseband signal for distances
of up to 185 m in a physical bus topology (often referred to as Thin ETHERNET
or ThinNet).
10Base5 Uses a 10 mm 50 Ohm coaxial cable for a 10Mbps baseband signal for distances
of up to 500 m in a physical bus topology (often referred to as Thick
ETHERNET).
10Base-F Uses a fiber-optic cable for a 10Mbps baseband signal for distances of up to
4 km in a physical star topology.
(There are three sub-specifications: 10Base-FL for fiber-optic link, 10Base-FB
for fiber-optic backbone and 10Base-FP for fiber-optic passive).
10Base-T Uses a 24 AWG UTP or STP/UTP (twisted pair cable) for a 10Mbps baseband
signal for distances up to 100 m in a physical star topology.
10Broad36 Uses a 75 Ohm coaxial cable for a 10Mbps baseband signal for distances of up to
1800 m (or 3600 m with double cables) in a physical bus topology.
100BaseTX Specifies a 100 Mbps transmission with a twisted pair cable of Category 5 and
RJ45-connectors. A maximum segment of 100 meters may be used.
Tab. 5-1: ETHERNET Transmission Standards
Beyond that there are still further transmission standards, for example:
100Base-T4 (Fast ETHERNET over twisted conductors), 100Base-FX (Fast
ETHERNET over fiber-optic cables) or P802.11 (Wireless LAN) for a
wireless transmission.