3 REPLACEMENT OF I/O MODULE
3 - 18
(3) Specifications comparison between A1SX20 and QX28
: Compatible, : Partially changed, : Incompatible
*1 Check the specifications of the sensor or switches to be connected to the QX28.
*2 The following shows the derating chart.
Specifications A1SX20 QX28
Compat-
ibility
Precautions for replacement
Number of input points 16 points
8 points
(16 points occupied)
When 9 or more points are used,
use two QX28 modules.
Isolation method Photocoupler Photocoupler
Rated input voltage 200-240VAC 50/60Hz 100-240VAC 50/60Hz
Input voltage distortion Within 5% Within 5%
Rated input current Approx. 9mA (200VAC 60Hz)
Approx. 17mA (200VAC, 60Hz),
Approx. 14mA (200VAC, 50Hz),
Approx. 8mA (100VAC, 60Hz),
Approx. 7mA (100VAC, 50Hz)
Inrush current
Maximum 500mA Within 1ms
(264VAC)
Maximum 500mA Within 1ms
(264VAC)
Operating voltage range 170 to 264VAC (50/60Hz±5%) 85 to 264VAC (50/60Hz±3Hz)
Maximum number of
simultaneous input points
Refer to the derating chart.
*2
Refer to the derating chart.
*2
Use it within the range shown in
the derating chart.
On voltage/on current 80VAC or more/4mA or more
80VAC or more/5mA or more
(50Hz, 60Hz)
The on current differs.
*1
Off voltage/off current 30VAC or less/1mA or less
30VAC or less/1.7mA or less
(50Hz, 60Hz)
The off current differs.
*1
Input resistance
Approx. 22k(60Hz),
Approx. 27k(50Hz)
Approx. 12k(60Hz),
Approx. 15k(50Hz)
The input resistance is
reduced.
*1
Response
time
Off on 30ms or less (200VAC, 60Hz) 10ms or less (100VAC 50Hz, 60Hz)
On off 55ms or less (200VAC, 60Hz) 20ms or less (100VAC 50Hz, 60Hz)
Common terminal
arrangement
16 points/common
(common terminal: TB9, TB18)
8 points/common
(common terminal: TB17)
Operation indication On indication (LED) On indication (LED)
External connection
system
20-point terminal block connector
(M3.57 screws)
18-point terminal block
(M36 screws)
Wiring change is required.
Applicable wire size
0.75 to 1.25mm
2
Core: 0.3 to 0.75mm
2
(outside diameter: 2.8mm or less)
Applicable solderless
terminal
R1.25-3.5, R2-3.5,
RAV1.25-3.5, RAV2-3.5
R1.25-3
(Sleeved solderless terminal cannot
be used.)
Current consumption 0.05A (typ. all points on) 0.05A (typ. all points on)
When two QX28 modules are
used, the current consumption is
increased. Review the current
capacity.
External dimensions 130(H)×34.5(W)×93.6(D)mm 98(H)×27.4(W)×90(D)mm Wiring space is narrower.
Weight 0.23kg 0.20kg
When two QX28 modules are
used, the weight is increased.
Calculate the weight carefully.
(A1SX20) (QX28)
200VAC
220VAC
240VAC
264VAC
On ratio (%)
100
90
80
70
60
50
40
0102030405055
On
ratio
Ambient temperature
100%
45
87.5%
55
100%
55
240
264
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