Limit Position Switch - Festo CPX-F8DE-P Manual

1. System overview CPX-F8DE-P

1.4.3 Limit position switch

Festo P.BE-CPX-F8DE-P-E N en 1610a English
In this sample application, piston positions are evaluated with
2 two-channel sensors with mechanical contacts (internally
antivalent, NO/NC) via a channel pair on the input module.
Mode 4
E1
E0
T0
T1
Fig. 1/6: Evaluation of limit position switches
Note
Faults are possible.
For this function mode, do not use electronic sensors
•
with standby diode on a shared sensor output.
Alternatively: Electronic 3-wire sensors with polarity re­
versal protection in positive power supply connection.
Note
Safety-related evaluation only with the following connec­
tion blocks:
– CPX-M-AB-4-M12X2-5POL-T
– CPX-AB-8-KL-4POL.
Antivalency is evaluated in order to diagnose the sensor wir­
ing. Reaching the limit position is output as a secured logical
information in the PAE (input image).
Cylinder 2
Cylinder 3
1-45