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Function Modules
Sensor Requirements
The following requirements must be satisfied by the sensor signals to the module inputs:
•
Signal sequence for up-counting
t
Sensor
1
signals: V
a1
(A, A-N/A)
t
t
t
V
a2
(B, B-N/B)
V
a0
(R, R-N/R)
•
Pulse time of the sensors
5-V Sensors
t
500 ns
t
2 µs
1
t
500 ns
2
•
Minimum edge steepness
5 V - differential signals according to RS 422A (A, A-N, B, B-N, R, R-N):
24 V - count pulses and reference pulse (A, B, R):
24 V - enable and reference signal:
EWA 4NEB 812 6120-02
t
t
1
Figure 15-13. Signal Sequence for Up-Counting
24-V Sensors
10 µs
40 µs
10 µs
t
2
Pulses
V
= Position decoder count pulses (A)
a1
V
= Position decoder count pulses (B)
a2
V
= Position decoder ref. pulse (R)
a0
S5-100U
5
V/µs
0.3 V/µs
0.3 mV/µs
15-23
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