Siemens IP-Module Especificaciones Pagina 39

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Hardware Installation IP 240
Incremental Encoders
(with symmetrical outputs to RS 422 A)
Fig. 4-4. Connection of Encoders with Symmetrical Output Signals
2
13
11
9
4
6
15
8
5 V
Z
Z
B
B
A
A
Channel set to
symmetrical
encoder
signals
Receiver electronics
1.6 A T
Connector
X2/X4
Encoder electronics
5 V
5 V
+
M
M
M
Connect shield
to frame
Cable driver to
DIN 66 259
I/O Standard RS 422 A
5 V
M
Note
An AM26LS32 line receiver is used in the receiver electronics. The maximum per-
missible cable length is 30 m (100 ft.).
If the encoder electronics are operated with an independent supply (5 V), ground
potential differences of ±5 V between encoder electronics and receiver electronics
are permissible.
To change the direction of counting, A/A and B/B must be interchanged.
4-8
EWA 4NEB 811 6120-02a
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