Applications Of The F-I/O Module; Installation Of The Ground Line Between The Power Supply And The Baseunit - Siemens SIMATIC ET 200SP Manual

Applications of the F-I/O module

You achieve SIL3/Cat.4/PLe with the following applications.
The wiring is performed on the suitable BaseUnit. For more on this, see Connecting section
in the system manual Distributed I/O System ET 200SP
(http://support.automation.siemens.com/WW/view/en/58649293).
5.1 Installation of the ground line between the power supply and the
BaseUnit
Interconnection
Connection of the load to the M
terminal of the BaseUnit
Connection of the load to the
ground of the BaseUnit
In case of redundant installation of the ground line between the power supply and the
BaseUnits, the ground connection to the BaseUnits must be installed as follows:
● When the fail-safe digital output module F-DQ 8x24VDC/0.5A PP HF is installed on a
dark-colored BaseUnit, terminal M of this dark-colored BaseUnit must be additionally
connected to the ground of the power supply.
● When the fail-safe digital output module F-DQ 8x24VDC/0.5A PP HF is installed on a
light-colored BaseUnit, terminal M of the dark-colored BaseUnit installed to the right of
the light-colored BaseUnit must be additionally connected to the ground of the power
supply.
When connecting the load to the ground of the power supply, you must run two ground
lines between the power supply and the BaseUnits for safety reasons to achieve
SIL3/Cat.4/PLe. Otherwise, the maximum residual current at signal "0" (specified in the
technical specifications) cannot be maintained if a single ground line is interrupted.
See also
Connecting (Page 14)
26
WARNING
Achievable fail-safe performance characteristics
Single ground line
SIL3/Cat.4/PLe
n
SIL3/Cat.3/PLd
Digital output module F-DQ 8x24VDC/0.5A PP HF (6ES7136-6DC00-0CA0)
5
Redundant ground line
Not required
SIL3/Cat.4/PLe
Manual, 05/2017, A5E38578424-AA