1-2
ET 200U Distributed I/O Station
EWA 4NEB 812 6087–02b
1.1
What is ET 200?
The ET 200 distributed I/O system is based on the PROFIBUS standard (DIN
19245, Part 1) and the PROFIBUS–DP standard draft (DIN 19245, Part 3).
The SIEMENS PROFIBUS is called SINEC L2.
The field bus which is the basis for the ET 200 distributed I/O system is a
variant of the SINEC L2 with the name SINEC L2–DP (“DP” = Distributed
periphery). This variant is designed for the shortest reaction times in commu-
nication with distributed I/Os.
+
IM 308–B
SINEC L2–DP Field Bus
(Two–wire or fibre optic cable)
ET 200C
ET 200B
ET 200U
Further
field
devices
Figure 1-1 Component Described in this Manual of the ET 200 Distributed I/O System
System Overview