Mode Ak6/Sil3/Category - Siemens SIMATIC ET 200eco Manual

Digital F I/O Module
8.2.3 Application 2: Safety Mode AK6/SIL3/Category 3
Assigning Inputs to Each Other
The ET 200eco 4/8 F-DI has 8 fail-safe inputs DI 0 to DI 7 (SIL2). Two inputs each
can be used as one input (SIL3) The following assignment applies:
•
DI 0 with DI 4
•
DI 1 with DI 5
•
DI 2 with DI 6
•
DI 3 with DI 7
Sensor Supply
The ET 200eco 4/8 F-DI provides sensor supply Vs1 for inputs 0 to 3 and sensor
supply Vs2 for inputs 4 to 7. The sensor power supply can be provided internally or
externally.
Wiring Diagram for Application 2.1 – Connecting one channel of one sensor to
two inputs
One channel of a sensor is connected to two inputs of the fail-safe I/O module for
each process signal (1oo2 evaluation).
Note
If the voltage is supplied to the sensor by the fail-safe I/O module, you must use
the internal sensor supply Vs1. Connection to Vs2 is not possible.
8-12
ET 200eco Distributed I/O Station Fail-Safe I/O Module
A5E00297494-02