Festo — CPX-F8DE-P — 2022-10d
System overview CPX-F8DE-P
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2.4.3
Limit position switch
In this application example, piston positions are evaluated with 2 two-channel sensors with mechan-
ical contacts (internally antivalent, N/O and/or N/C) via a channel pair on the input module.
Fig. 20: Evaluation of limit position switches
NOTICE
Malfunctions are possible.
• In this function mode do
not use electronic sensors with standby diode on a shared sensor output.
Alternatively: electronic 3-wire sensors with reverse polarity protection in positive supply port.
NOTICE
Safety-related evaluation only with the following manifold blocks:
• CPX-M-AB-4-M12X2-5POL-T
• CPX-AB-8-KL-4POL.
Antivalence is evaluated in order to diagnose the sensor wiring. Reaching the end position is output as
secured logical information in the PAE (input image).
