Interface To The Incremental Position Encoder - Siemens SIMATIC S5 Manual

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,
the direction of travel. These signals, as well as a reference signal (R), must be
provided by the incremental position encoder.
Asymmetrical encoder (24 V)
A*
B*
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
Technical Description of the IP 266
for position decoding and for ascertaining
Table 2.-1. Encoder Signals
Symmetrical encoder (5 V)
A
A\
B
B\
R
R\
2-5