Function description
Operating Manual PNOZ ms2p TTL
1001722-EN-03
14
4.4
Input device types
4.4.1
Proximity switch
4.4.1.1
Requirements of the proximity switches
}
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.
}
When monitoring with proximity switches we recommend you use proximity switches
with hysteresis in order to prevent bounce and therefore incorrect measurements.
Proximity switch 1
Proximity switch 2
Fig.: Example proximity switch signal behaviour
CAUTION!
Appropriate installation measures should be taken to prevent a foreign body
coming between the signal encoder and the proximity switch. The foreign
body could cause one of the proximity switches to be constantly energised
(constant high signal).
}
Please note the values stated in the technical details
4.4.2
Incremental encoders
4.4.2.1
Requirements of the incremental encoders
}
Only incremental encoders with a differential output of the following type are permitted
– Sin/Cos
– TTL (RS422)
}
Please note the values stated in the technical details