Omron HOME SECURITY SYSTEM - MOTION SENSOR FQM1-MMA21 - Manual (Page 174)

151
Pulse Inputs Section 7-5
Minimum response pulse
At 50 kHz
At 500 kHz Operation may not be reliable above 50 kHz.
Item Specification
OFF
ON
50%
OFF
ON
T1
T2 T4
T3
OFF
ON
50%
ON
50%
OFF
Encoder Inputs A and B
Waveform of Encoder Inputs A and B
Signal rise and fall must be 3
µs max.
50-kHz pulse with 50% duty ratio
20 µs min.
10 µ s min. 10 µ s min.
3 µs max. 3 µs max.
Relationship to Phase Differential Inputs A and B
T1, T2, T3,and T4 must be 4.5
µs min.
There must be 4.5 µs min. between phase-A and
phase-B change points.
20 µs min.
Phase A
Phase B
Encoder Input Z or Sensor Input
Encoder Input Z Waveform
The pulse width must be 90
µs min.
90 µs min.
OFF
ON
50%
OFF
ON
T1
T2 T4
T3
OFF
ON
50%
ON
50%
OFF
Encoder Inputs A and B
Encoder Inputs A and B Waveform
Square waveform
50-kHz pulse with 50% duty ratio
20 µs min.
10 µ s min. 10 µ s min.
Relationship to Phase Differential Inputs A and B
T1, T2, T3,and T4 must be 4.5
µs min.
There must be 4.5 µs min. between phase-A and
phase-B change points.
20 µs min.
Phase A
Phase B
Encoder Input Z or Sensor Input
Encoder Input Z Waveform
The pulse width must be 90
µs min.
90 µs min.
OFF
ON
50%
OFF
ON
T1
T2 T4
T3
OFF
ON
50%
ON
50%
OFF
Encoder Inputs A and B
Encoder Inputs A and B Waveform
Square waveform
1-MHz pulse with 50% duty ratio
1 µs min.
0.5 µs min. 0.5 µs min.
Relationship with Phase Differential Inputs A and B
T1, T2, T3,and T4 must be 0.5
µs min.
There must be 0.5 µs min. between phase-A and
phase-B change points.
2 µs min.
Encoder Input Z or Sensor Input
Encoder Input Z Waveform
The pulse width must be 10
µs min.
10 µs min.