Pilz PNOZ ms1p standstill / speed monitor - Manual (Page 18)

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- ` Only proximity switches of type "pnp" are allowed to be used (N/O
contact, switching to positive).
` The proximity switches require a 24 VDC supply.
` The proximity switches must be fitted such that at least one is always
activated (provides a high signal).
` The proximity switches must be fitted such that the recorded signals
overlap.
Fig. 4-1: Example proximity switch signal behaviour
` Pay attention to the values in the technical details
4.2.2 Incremental encoders
Incremental encoders 4-
4.2.2.1 Requirements of the incremental encoders
Requirements of the incremental encoders 4- ` Only incremental encoders with a differential output of the following
type are permitted
– Sin/Cos
– TTL (RS 422)
` 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