
Hardware Installation IP 240
Fig. 4-6. Connection of Encoders with Asymmetrical Signals:
Open-Collector Encoder Output Circuit
Connector
X2/X4
Z*
9
M
B*
A*
L+
Channel set to
24 V and
asymmetrical
encoder
signals
Receiver electronics
M
13
2
11
4
6
15
8
L+
External pull-up
resistors
R
R
R
Encoder electronics
Note
All encoders whose output circuitry allows a load with respect to ground and meets
the required input level can be connected.
Encoders with open-collector outputs can also be connected with external pull-up
resistors.
To change the direction of counting, A* and B* must be interchanged.
4-10
EWA 4NEB 811 6120-02a
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