Festo Checkbox Compact CHB-C-X - Page 60

3. The I/O module
3-9
Festo P.BE-CB-COMP-EN en 1102d
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 rest state.
• Adapt the setting of the sensor type with CheckKon.
You can then prevent the system from becoming blocked
e.g.intheeventofabrokencable.
Sensor type
Function
Buffer zone with one sensor
Normally
open
contact
1)
Normally
closed
contact
2)
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
Thebufferzoneisfull.Thedisplay
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 c onveyor device contin-
ues to run.
1)
Factory presetting; negative switching (N PN), 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.