Network Architecture - Principles And Regulations; Connection Principle Of A Fieldbus Node For A Network Architecture - WAGO 750 Series Manual

126 • ETHERNET
Network Architecture – Principles and Regulations
The use of ETHERNET as a fieldbus allows continuous data transmission
between the plant floor and the office. Connection of the ETHERNET TCP/IP
fieldbus controller to the Internet even enables industrial processing data for
all types of applications to be called up world-wide. This makes site
independent monitoring, visualization, remote maintenance and control of
processes possible.
WAGO Kontakttechnik GmbH is a member of IAONA Europe, an
organization with the purpose of establishing ETHERNET in automation
technology.
5.2 Network Architecture – Principles and Regulations
A simple ETHERNET network is designed on the basis of one PC with a
network interface card (NI), one crossover connection cable, one ETHERNET
fieldbus node and one 24 V DC power supply for the coupler voltage source.
Each fieldbus node consists of an ETHERNET TCP/IP fieldbus
coupler/controller, I/O modules, and an end module. The individual bus
modules are connected to the ETHERNET TCP/IP fieldbus coupler/controller
via an internal bus when they are snapped onto the carrier rail.
It is possible to connect 64 I/O modules to an ETHERNET TCP/IP fieldbus
coupler/controller.
Note
Use of the WAGO 750-628 Bus Extension Coupler Module and 750-627
Extension End Module enables support of up to 250 I/O modules on the
750-841 controller (with softwareversion ≥ SW 9).
Sensors and actuators are connected to the digital or analog I/O modules on
the field side. These are used for process signal acquisition or signal output to
the process, respectively.
The fieldbus coupler/controller automatically detects all connected I/O
modules, creating a local process image of them. This can consist of a mixed
arrangement of analog and digital modules.
fieldbus
connection
Fig. 5-1. Connection Principle of a Fieldbus Node for a Network Architecture
Fieldbus communication between master application and fieldbus controller
takes place using either the MODBUS TCP protocol or Ethernet/IP.
DC 24V
connection
sensor and actuator
connection
1Netwerkknotene
WAGO-I/O-SYSTEM 750
ETHERNET TCP/IP