Mitsubishi Electric MELSEC Q Series Handbook page 86

3
REPLACEMENT OF I/O MODULE
(18)Specifications comparison between A1SX42 (24VDC) and QX42
Specifications
Number of input points
Isolation method
Rated input voltage
Rated input current
Operating voltage range
Maximum number of
simultaneous input points
On voltage/on current
Off voltage/off current
Input resistance
Off  on
Response
time
On  off
Common terminal
arrangement
Operation indication
External connection
system
Applicable wire size
Current consumption
External dimensions
Weight
*1 Check the specifications of the sensor or switches to be connected to the QX42.
*2 The following shows the derating chart.
3
- 33
A1SX42
64 points
Photocoupler
12/24VDC
Approx. 2mA/Approx. 5mA
10.2 to 26.4VDC
(ripple ratio within 5%)
*2
Refer to the derating chart.
8VDC or more/2mA or more
4VDC or less/0.6mA or less
Approx. 5k
10ms or less
(24VDC)
10ms or less
(24VDC)
32 points/common
(common terminal: 1B1, 1B2, 2B1,
2B2)
On indication (LED)
32-point switching indication with the
switch
40-pin connector 2 pieces
(accessory)
2
0.3mm
0.09A (typ. all points on)
130(H)34.5(W)93.6(D)mm
0.28kg
(A1SX42)
24VDC
26.4VDC
: Compatible,
QX42
64 points
Photocoupler
24VDC
Approx. 4mA
20.4 to 28.8VDC
(ripple ratio within 5%)
*2
Refer to the derating chart.
19VDC or more/3mA or more
11VDC or less/1.7mA or less
Approx. 5.6k
1ms/5ms/10ms/20ms/70ms or less
(Configure the setting in the PLC
parameter dialog box.)
10ms is set by default.
1ms/5ms/10ms/20ms/70ms or less
(Configure the setting in the PLC
parameter dialog box.)
10ms is set by default.
32 points/common
(common terminal: 1B01, 1B02,
2B01, 2B02)
On indication (LED)
32-point switching indication with the
switch
40-pin connector 2 pieces
(sold separately)
2
0.3mm
(A6CON1, A6CON4)
0.09A (typ. all points on)
98(H)27.4(W)90(D)mm
0.18kg
100
90
80
ON
70
ratio/
common 60
50
40
30
20
0 10
Ambient temperature
: Partially changed, : Incompatible
Compat-
Precautions for replacement
ibility



The rated input current is
*1
reduced.


The on voltage/on current differ.
The off voltage/off current differ.
The input resistance is
*1
increased.

Set the input response time of
parameter to the default value
(10ms).




Existing external wiring can be
used.


(QX42)
24VDC
26.4VDC
28.8VDC
20 30 40 50 55
*1
*1