Festo Checkbox Compact CHB-C-C, Manual

Page: 54 / 138

3. The I/O module
3-6
Festo P.BE-CB-COMP-EN en 0211a
Example of configuration: Transport device with 2 blow-
down nozzles
The compressed air valves of the reject positions must be
connected directly to the outputs actuators 1...2. These out-
puts will be set to + 24 V DC if the parts test delivers the fol-
lowing result:
– incorrectly orientated or superfluous (good) part
– bad or foreign part.
If the Checkbox recognizes a test part as a good part, the
signal actuator 3 will be set from rest potential 0 V to
+ 24 V DC and the good part will be delivered at the end of
the transport device.
Output Signal level (example of configuration)
Actuator 1 The + 24 V DC signal is present when the test part
passes the actuator position for incorrectly orientated
or superfluous good parts.
1)
Actuator 2 The + 24 V DC signal is present when the test part
passes the actuator position for bad or foreign parts.
1)
Actuator 3 The + 24 V DC signal is present when the test part
passes the actuator position for good parts (here the
end of the transport device).
1)
The duration of the signal corresponds to the time the part
requires to pass the blow-down nozzle.