Siemens IP-Module Manual Pagina 27

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IP 266 Technical Description of the IP 266
C A U T I O N :
Like the encoder interface, the programmer port is a 15-pin interface, and it is
therefore possible to confuse the one with the other. The programmer port is
the one at the right. If you use the wrong interface, the module executes a
RESET.
2.3 Interface to the Incremental Position Encoder
The IP 266 requires two signals in quadrature (signals A and B), i. e. displayed by
90 deg. with respect to each other, for position decoding and for ascertaining
the direction of travel. These signals, as well as a reference signal (R), must be
provided by the incremental position encoder.
Table 2.-1. Encoder Signals
Asymmetrical encoder (24 V) Symmetrical encoder (5 V)
A* A
A\
B* B
B\
R* R
R\
You can connect either encoders with 5 V signals or encoders with 24 V signals.
The 5 V encoders must also provide the inverted signals A\, B\ and R\.
The 15-pin D SUB socket on the module's frontplate contains all supply and signal
lines for both types of encoder.
EWA 4NEB 812 6057-02
2-5
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