Mitsubishi Electric MELSEC Q Series Handbook page 90

3
REPLACEMENT OF I/O MODULE
(22)Specifications comparison between A1SX42-S2 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
- 37
A1SX42-S2
64 points
Photocoupler
24VDC
Approx. 5mA
19.2 to 26.4VDC
(ripple ratio within 5%)
*2
Refer to the derating chart.
17.5VDC or more/3.5mA or more
7VDC or less/1.7mA or less
Approx. 4.7k
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-S2)
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 operating voltage range
differs.

The on voltage/on current differ.
*1
The off voltage differs.
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