Pilz PNOZms2p HTL - Manual (Page 16)

4.2 Input device types
4 Function description
Pilz GmbH & Co. KG, Felix-Wankel-Straße 2, 73760 Ostfildern, Germany
Telephone: +49 711 3409-0, Telefax: +49 711 3409-133, E-Mail: [email protected]
4-2
4.2 Input device types 4200 Input device types 4- 4.2.1 Proximity switch
Proximity switch 4-
4.2.1.1 Requirements of the proximity switches
Requirements of the proximity switches 4- Drehzahlwaechter_Naeherungsschalter_Anford
 Only "pnp" type proximity switches may be used (N/O contact,
switching to positive).
 The proximity switches require a 24 VDC supply.
 The proximity switches must be fitted so that at least one is always
activated (carries a high signal).
 The proximity switches must be fitted so that the recorded signals
overlap.
Fig. 4-1: Example proximity switch signal behaviour
 Please note the values stated in the technical details
CAUTION!
Appropriate installation measures should be taken to prevent a
foreign body coming between the signal input device and the
proximity switch. The foreign body could cause one of the prox-
imity switches to be constantly energised (constant high signal).
Proximity switch 1
Proximity switch 2