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3. SPECIFICATIONS
4.
. I
. . .
MELSEC-A
3.7
I/O Interface with External Equipment
3.7.1 AlSD71
electrical specifications
Table 3.10 AlSD71 Electrical Speclfications
I/O
(5 to 24
Input
VDC)
(5 VDC)
Input
output
Signal
Supply power
Drive unit ready
( R E A D Y )
Stop signal
( S T O P )
Near-point signal
(m)
Supply power
Control switching signal
Enable signal
Start
signal
(START)
Error detector clear
( C L E A R )
Forward feed pulse ( P U L S E )
Reverse feed pulse
( m )
Description
5 to 24V DC (Prepare a 4.75 to 26.4V stabilized power supply.)
50mA (maximum)
High
:(Supply power voltage
-
1 V) or more
(Input current :0.3mA or less)
(Input current :2.5mA or more)
Low
:(Supply power voltage
-
3V) or
less
High
:(Supply power
voltage
-
1V) or more
(Input current :0.3mA
or
less)
(Input current :2.5mA or more)
Low
:(Supply power
voltage
- 3V) or less
Pulse width
:50 ps or more
Pulse rise time :3 ps or less
Pulse fall time :3 ps or less
5 VDC (Prepare 4.75 to 5.25 V stabilized power supply.)
HIGH level :Voltage
4.5 V or more
Current
3 mA or more
LOW level :Voltage
1
.O
V or less
Current
0 mA
Pulse width :1 msec or more
Response time from OFF to ON :lmsec
Output form
:Open collector
Load voltage
:4.75 to 26.4V DC
Load current
:10mA (maximum)
Max. drop voltage when ON :0.6V or less
Leakage current when OFF
:O. 1
mA or less
Output form :Open collector
Section 3.7.2 gives details about the pulse leading/
trading edge time.
Load voltage :4.75 to 26.4V DC
Load current :50mA (maximum)
3-71
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