Siemens SIMATIC ET 200AL System Manual page 21

2.3 Components
Components of the ET 200AL distributed I/O system
The following table shows and explains the function of the most important components of
the ET 200AL distributed I/O system.
Table 2- 2 Components of the ET 200AL distributed I/O system
Components
Interface module for PROFINET IO
Interface module for PROFIBUS DP
I/O modules
eCoding plug connector
Y-cable
Identification labels
Distributed I/O system
System Manual, 08/2021, A5E31861578-AJ
Function
• The interface module connects the
ET 200AL distributed I/O system with the
IO controller
• Exchanges data with the I/O modules via
ET-Connection
• The interface module connects the
ET 200AL distributed I/O system with the
DP master
• Exchanges data with the I/O modules via
ET-Connection
• The I/O modules form the interface to the
process
• Recording and controlling the current
process status via the connected sensors
and actuators
Electronic coding element with an overwrita-
ble electronic memory for module-specific fail-
safe address data (for example, the F-
destination address)
Y-cable connects multiple actuators or sensors
to inputs or outputs. There are two types:
• Y-cable: Connects inputs or outputs of the
module to several actuators or sensors.
• Inverted Y-cable: Connects several fail-safe
inputs or outputs of the F-module with one
or more sensors and actuators
• The identification labels come with the
module and can be machine printed
• Can be ordered separately in white or yel-
low for fail-safe modules
System overview
2.3 Components
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