Product description
Hans Turck GmbH & Co. KG | T +49 208 4952-0 | F +49 208 4952-264 | more@turck.com | www.turck.com
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3.5 Safe I/O channels
The device provides two 2-channel safe digital inputs (FDI) and two safe connectors (FDX), configu-
rable as in- or outputs.
The two configurable FDX-channels can be used as input (FDI) or as output (FDO).
The safe I/O channels are designed for applications up to:
Cat4/PLe according to EN ISO 13849-1,
SIL3 according to IEC 61508,
SILCL 3 according to IEC62061.
3.5.1 Safe Status
In the safe state the device outputs are in LOW-state (0).
The inputs report a LOW-state (0) to the logic.
3.5.2 Fatal Error
The following errors lead to Fatal Error and thus to the safe state:
Incorrect wiring at the output (e.g. capacitive load, energetic recovery)
Incorrect power supply
Strong EMC disturbances
Internal device error
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