Mitsubishi Electric MELSEC-Q Series - Page 96

3 REPLACEMENT OF I/O MODULE
3 - 43
(28)Specifications comparison between A1SX71 (5VDC, 12VDC) and QX71
: Compatible, : Partially changed, : Incompatible
*1 The following shows the derating chart.
Specifications A1SX71 QX71
Compat-
ibility
Precautions for replacement
Number of input points 32 points 32 points 
Isolation method Photocoupler Photocoupler 
Rated input voltage 5/12/24VDC 5/12VDC 
Rated input current
5VDC Approx. 1.2mA
12VDC Approx. 3.3mA
24VDC Approx. 7mA
5VDC Approx. 1.2mA
12VDC Approx. 3.3mA

Operating voltage range
4.5 to 26.4VDC
(ripple ratio within 5%)
4.5 to 6VDC
(ripple ratio within 5%)
10.2 to 14.4VDC
(ripple ratio within 5%)

Maximum number of
simultaneous input points
Refer to the derating chart.
*1
Simultaneously on (100%) 
On voltage/on current 3.5VDC or more/1mA or more 3.5VDC or more/1mA or more 
Off voltage/off current 1VDC or less/0.1mA or less 1VDC or less/0.1mA or less 
Input resistance Approx. 3.5k Approx. 3.3k 
Response
time
Off  on 1.5ms or less
1ms/5ms/10ms/20ms/70ms or less
(Configure
the setting in the PLC
parameter dialog box.
)
10ms is set by default.

The response time differs.
Set the time according to the
control.
On  off 3ms or less
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: B1, B2)
32 points/common
(common terminal: B01, B02)

Operation indication On indication (LED) On indication (LED) 
External connection
system
40-pin connector
(accessory)
40-pin connector
(sold separately)

Existing external wiring can be
used.
Applicable wire size
0.3mm
2
0.3mm
2
(A6CON1, A6CON4)

Current consumption 0.075A (typ. all points on) 0.07A (typ. all points on) 
External dimensions 130(H)34.5(W)93.6(D)mm 98(H)27.4(W)90(D)mm
Weight 0.19kg 0.12kg
(A1SX71)
24VDC
26.4VDC
On ratio (%)
49 56