Festo Checkbox Compact CHB-C-X, Руководство пользователя

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3. The I/O module
3−9
Festo P.BE−CB−COMP−en en 0503c
Please note
You can optimize the operational safety of your supply
system as follows:
·
Use sensors which have a sensor output with a potential
of 24 V DC in the quiescent condition.
·
Adapt the setting of the sensor type with CheckKon.
You can then prevent the system from becoming blocked
e.g. in the event of a cable fracture.
Sensor type Function
B ff ith
Normally−
open
contact
1)
Normally−
closed
contact
2)
Buffer zone with one sensor
Sensor 1
LOW Sensor 1
HIGH The sensor does not register a
conveyed part. The small parts
conveyor is/remains switched on.
Sensor 1
HIGH Sensor 1
LOW The buffer zone is full. The display
switches to Full". Good parts are
returned. When the preset time
e.g. 30 s has expired, the small
parts conveyor will be switched
off; the conveyor device still runs.
1)
Factory presetting; negative switching (NPN), 24 V DC active high
2)
To be set with CheckKon (recommendation); positive switching
(PNP), 24 V DC active low
Information on dimensioning the buffer zone can be found in
chapter 1.5.