6
Installation and Operation
EDBC250SIO | 2.0
52
6.2.7
Sensor Connection
Single-channel contact-type sensor
CAUTION
Maximum state change time of the application
For single-channel applications (inputs and outputs), the test pulse frequency
must be adapted to the application. It must be ensured that for applications in
which a frequent change of state occurs, the test pulse frequency is selected at
least 100 times greater than the state change time of the application.
See 6.3.2 FSoE Parameters.
The inputs of single-channel contact-type sensors work entirely separate from one another.
Wiring should take account of the fact that every input signal is allocated to the test pulse
output. Use the configuration to separately enable each of the inputs
►
6.3.3 Input
Parameters
Analysis of states
The module checks the states of the inputs and transfers the result to the safe control unit.
The process data image of a safe input transfers
•
"0" if a "0" signal is supplied to the input or if an error has been detected;
•
"1" if a "1" signal is supplied to the input or if an error has not been detected.
To disable the clock signals
If the appropriate parameter disables the clock signals, you may supply 24 V DC to the sensor
from an external power source. If so, please remember that disabled test pulse outputs
prevent the detection of faults in the external wiring.
WARNING
Non-detection of a corrupt external wiring when test pulse outputs are
disabled
Unsafe machine state, safety hazard
Always use the correct and enabled test pulse output to supply power to
contact-type sensors.
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