Mitsubishi Electric MELSEC-Q Series - Page 74

3 REPLACEMENT OF I/O MODULE
3 - 21
(6) Specifications comparison between A1SX30 (24VDC, negative common) and QX80
: Compatible, : Partially changed, : Incompatible
*1 Check the specifications of the sensor or switches to be connected to the QX80.
*2 The following shows the derating chart.
Specifications A1SX30 QX80
Compat-
ibility
Precautions for replacement
Number of input points 16 points 16 points 
Isolation method Photocoupler Photocoupler 
Rated input voltage
12/24VDC,
12/24VAC (50/60Hz)
24VDC 
Rated input current
8.5mA (24VDC/AC),
4mA (12VDC/AC)
Approx. 4mA
The rated input current is
reduced.
*1
Operating voltage range
10.2 to 26.4VDC
(ripple ratio within 5%),
10.2 to 26.4VAC
(50/60Hz±5%)
20.4 to 28.8VDC
(ripple ratio within 5%)

Maximum number of
simultaneous input points
Refer to the derating chart.
*2
Simultaneously on (100%) 
On voltage/on current 7VDC/AC or more/2mA or more 19VDC or more/3mA or more
The on voltage/on current differ.
*1
Off voltage/off current 2.7VDC/AC or less/0.7mA or less 11VDC or less/1.7mA or less
The off voltage/off current differ.
*1
Input resistance Approx. 2.7k Approx. 5.6k
The input resistance is
increased.
*1
Response
time
Off  on
20ms or less (12/24VDC),
25ms or less
(12/24VAC 60Hz)
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
the parameter to 20ms.
On  off
20ms or less (12/24VDC),
20ms or less
(12/24VAC 60Hz)
1ms/5ms/10ms/20ms/70ms or less
(Configure the setting in the PLC
parameter dialog box.)
10ms is set by default.

Common terminal
arrangement
16 points/common
(common terminal: TB9, TB18)
16 points/common
(common terminal: TB18)

Operation indication On indication (LED) On indication (LED) 
External connection
system
20-point terminal block connector
(M3.57 screws)
18-point terminal block
(M36 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) 
External dimensions 130(H)×34.5(W)×93.6(D)mm 98(H)×27.4(W)×90(D)mm Wiring space is narrower.
Weight 0.20kg 0.16kg
(A1SX30)
26.4VAC
On ratio (%)