3 REPLACEMENT OF I/O MODULE
3 - 33
(18)Specifications comparison between A1SX42 (24VDC) and QX42
: Compatible, : Partially changed, : Incompatible
*1 Check the specifications of the sensor or switches to be connected to the QX42.
*2 The following shows the derating chart.
Specifications A1SX42 QX42
Compat-
ibility
Precautions for replacement
Number of input points 64 points 64 points
Isolation method Photocoupler Photocoupler
Rated input voltage 12/24VDC 24VDC
Rated input current Approx. 2mA/Approx. 5mA Approx. 4mA
The rated input current is
reduced.
*1
Operating voltage range
10.2 to 26.4VDC
(ripple ratio within 5%)
20.4 to 28.8VDC
(ripple ratio within 5%)
Maximum number of
simultaneous input points
Refer to the derating chart.
*2
Refer to the derating chart.
*2
On voltage/on current 8VDC or more/2mA or more 19VDC or more/3mA or more
The on voltage/on current differ.
*1
Off voltage/off current 4VDC or less/0.6mA or less 11VDC or less/1.7mA or less
The off voltage/off current differ.
*1
Input resistance Approx. 5k Approx. 5.6k
The input resistance is
increased.
*1
Response
time
Off on
10ms or less
(24VDC)
1ms/5ms/10ms/20ms/70ms or less
(Configure
the setting in the PLC
parameter dialog box.
)
10ms is set by default.
Set the input response time of
parameter to the default value
(10ms).
On off
10ms or less
(24VDC)
1ms/5ms/10ms/20ms/70ms or less
(Configure
the setting in the PLC
parameter dialog box.
)
10ms is set by default.
Common terminal
arrangement
32 points/common
(common terminal: 1B1, 1B2, 2B1,
2B2)
32 points/common
(common terminal: 1B01, 1B02,
2B01, 2B02)
Operation indication
On indication (LED)
32-point switching indication with the
switch
On indication (LED)
32-point switching indication with the
switch
External connection
system
40-pin connector 2 pieces
(accessory)
40-pin connector 2 pieces
(sold separately)
Existing external wiring can be
used.
Applicable wire size
0.3mm
2
0.3mm
2
(A6CON1, A6CON4)
Current consumption 0.09A (typ. all points on) 0.09A (typ. all points on)
External dimensions 130(H)34.5(W)93.6(D)mm 98(H)27.4(W)90(D)mm
Weight 0.28kg 0.18kg
(A1SX42) (QX42)
100
90
80
70
60
50
40
0102030405055
Ambient temperature
24VDC
30
20
26.4VDC
28.8VDC
ON
ratio/
common
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