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SMP16-SFT251
2.4
Physical Characteristics of the Encoder Signals
Encoders can be connected to the board with an RS 422 or 24 V interface. The desired physical
characteristics must be selected with the two DIP switches (S1 and S2) on the board. See
chapter 3.4.
Caution
Since setting the wrong interface may destroy the board, make sure that all DIP
switches required for selection of the interface are set correctly.
2.5
Time Requirements for the Input Signals
2.5.1
Encoder Signals
The two track signals (A and B) of the encoder must be displaced by 90° to each other.
A track
B track
N track
(UREF)
Figure 2.2
Time relationships of the encoder signals
t1
t2
t3
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(4)J31069-D2090-U001-A1-7618
t2
t1
t1
A edge to B edge
Pulse width, A/B track
Pulse width, N track
t2
t1
t1
125 nsec (min.)
250 nsec (min.)
125 nsec (min.)
Features
t3
13
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