Mitsubishi Electric Melsec-Q172DCPU User Manual page 75

2 SYSTEM CONFIGURATION
Signal input form
Differential-output type
(26LS31 or equivalent )
Voltage-output/
Open-collector type
(Note-1): The maximum input pulse frequency is influenced by the leading/trailing edge time of the
Leading/trailing edge time (t)
(A-phase, B-phase input
common shared)
(c) Manual pulse generator/Incremental synchronous encoder input
1) Specifications of manual pulse generator/incremental synchronous
encoder
Item
Maximum input pulse frequency
Pulse width
Leading edge/trailing edge time
Phase difference
High-voltage
Low-voltage
Differential voltage
Cable length
Example of waveform
(For 1Mpps)
Maximum input pulse frequency
Pulse width
Leading edge/trailing edge time
Phase difference
High-voltage
Low-voltage
Cable length
Example of waveform
(For 200kpps)
input waveform. Countable frequencies are shown below.
t t
Maximum input pulse frequency
(Note-1)
1Mpps (After magnification by 4, up to 4Mpps)
Phase A
Phase B
(Note-1)
200kpps (After magnification by 4, up to 800kpps)
Phase A
Phase B
Up to 1Mpps Up to 500kpps Up to 200kpps Up to 100kpps
0.25µs or less 0.5µs or less
2 - 42
Specifications
Phase A/Phase B
1µs or more
0.25µs or less
0.25µs or more
2.0 to 5.25VDC
0 to 0.8VDC
0.2V
Up to 30m (98.43ft.)
1 s or more
0.5 s or more 0.5 s or more
0.25 s or more
0.25 s or less 0.25 s or less
(Note): Duty ratio 50%
5µs or more
1.2µs or less
1.2µs or more
3.0 to 5.25 VDC
0 to 1.0VDC
Up to 10m (32.81ft.)
5 s or more
2.5 s or more 2.5 s or more
1.2 s or more
1.2 s or less 1.2 s or less
(Note): Duty ratio 50%
1.25µs or less 2.5µs or less