21
2018/02
TBIP-L…-FDIO1-2IOL- Safe I/O channels
3.5.3 Safety inputs (FDI)
Safe inputs for safety-related sensors
Max. 4 × 2-channel safety switches and sensors
Contact based switches, e.g. emergency switches, protective door switches
Sensors with OSSD switch outputs with test pulses
Sensors with OSSD switch outputs without test pulses
Error detection/diagnostics:
Internal:
Device self test: Diagnosis of internal device errors
External:
Cross connection diagnosis:
The device detects a cross connection between the sensor supplies at the inputs or between one
sensor supply to another potential (if the test pulses are activated)
Discrepancy diagnosis: for 2-channel inputs
Short-circuit diagnosis
Parameters
For each input the following types can be selected:
Safe input for potential free contacts (NC/NC)
Safe antivalent input for potential free contacts (NC/NO)
Safe electronic input at OSSD-output with test pulses