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On
50%
Off
Phase A
On
50%
Off
Phase B
* M aximum a llowed f requency of Z-pulses is 1 k Hz
Selection
CJ-series High-speed Counter Units Operation Manual for NJ-series CPU Unit(W492)
Counter Inputs A, B, Z and Digital Inputs
5-, 12- or 24- VDC input signals
Counter inputs A and B
Input pulses with a duty factor of 50%
C
B
B
A
A
Relationship between A and B phases w ith phase
differential inputs
DD
D
Counter Input Z *
On
50%
Off
Z
E
Filter
A
B
10 kHz
<3
>50
50 kHz
<3
>10
500 kHz
<3
>2
RS-422 Line Driver signals
On
0V
Off
Relationship between A and B phases w ith phase
On
0V
Off
Phase A
On
0V
Off
Phase B
D
On
0V
Off
* Maximum allowed frequency of Z-pulses is 1 k Hz
Timing requirement [µs]
C
D
E
F
>100
>23
>10
>100
>20
>4.5
>10
>20
>4
>1
>10
>2
1 Introduction
Counter inputs A and B
Input pulses with a duty factor of 50%
F
GG
differential inputs
H
I
II
I
Counter Input Z *
Z
J
G
H
I
>50
>100
>23
>10
>20
>4.5
>1
>4
>1
1
J
>10
>10
>10
1-11
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