02.00 | 2022/07
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5
Safety function
The TB…-L…-4FDI-4FDX provide four safe digital SIL3 inputs (FDI) and four SIL3-connectors
(FDX), configurable as in- or outputs.
The following devices can be connected to the safety inputs:
n
1- and 2-channel safety switches and sensors
n
Contact based switches, e.g. emergency switches, protective door switches
n
Sensors with OSSD switching outputs
n
Antivalently switching OSSD sensors
The four safe SIL3 outputs can be used PP- or PM-switching.
Safe Status
In the safe state the device outputs are in LOW-state (0). The inputs report a LOW-state (0) to
the logic.
Fatal Error
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Incorrect wiring at the output (i.e. capacitive load, energetic recovery)
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Short-circuit at the line control output T2
n
Incorrect power supply
n
Strong EMC disturbances
n
Internal device error