MICRO-EPSILON optoNCDT 1750, Operating Instructions Manual

Page: 37 / 140

Page 37
Installation
optoNCDT 1750
5.4.8 Digital Output
The switching characteristic (NPN, PNP, Push-Pull, Push-Pull negated) of both digital outputs depends on the
programing.
The NPN output is e.g. suitable for adjustment to TTL logics with an auxiliary voltage UH= +5 V. The digital
outputs are protected against reverse polarity, overloading (> 100 mA) and over temperature.
NPN
+U
R
L
H
7/8
7/8 7/8
PNP
+U
B
Push-Pull
+U
B
R
L
Output is not galvanically isolated.
24V level (HTL),
I
max
= 100 mA,
U
Hmax
= 30 V saturation voltage at I
max
= 50 mA:
U
sat, low
< 1.5 V (output - GND),
U
sat, high
< 1.5 V (output - +U
B
)
Fig. 23 Electrical wiring digital output
Switching characteristic
Description
Output active
(error, limit value) Output passive
(no error, no off-limit condition)
NPN (Low side) GND appr. +U
H
PNP (High side) + U
B
appr. GND
Push-Pull + U
B
GND
Push-Pull, negated GND + U
B
Fig. 24 Switching characteristic digital output
The digital outputs are activated when measuring object is missing, measuring object too close/too far, no
valid measurement value or with an off-limit condition.