Mitsubishi Electric MELSEC-Q Series - Page 137

3 REPLACEMENT OF I/O MODULE
3 - 84
(20)Specifications comparison between A1SY81EP and QY81P
: Compatible, : Partially changed, : Incompatible
Specifications A1SY81EP QY81P
Compat-
ibility
Precautions for replacement
Number of output points 32 points 32 points 
Isolation method Photocoupler Photocoupler 
Rated load voltage 12/24VDC 12-24VDC 
Operating load voltage
range
10.2 to 26.4VDC 10.2 to 28.8VDC 
Maximum load current
0.1A/point, 2A/common
(25°C),
0.05A/point, 1.6A/common
(55°C)
0.1A/point, 2A/common 
Maximum inrush current
No limit
(overload protection function)
0.7A 10ms or less
Check the specification of the
device to be connected.
Leakage current at off 0.1mA or less 0.1mA or less 
Maximum voltage drop
at on
3.5VDC (0.1A Max.),
2.5VDC (0.1A Min.)
0.1VDC (typ.) 0.1A
0.2VDC (MAX.) 0.1A

Response
time
Off  on 0.5ms or less 1ms or less The response speed is slower.
On  off 1.5ms or less (resistance load)
1ms or less
(rated load, resistance load)

Surge suppressor Clamp diode Zener diode 
Common terminal
arrangement
32 points/common
(common terminal: 17, 18, 36)
32 points/common
(common terminal: 17, 18, 36)

Operation indication On indication (LED) On indication (LED) 
Protection function
Available
(overheat protection function,
overload protection function)
• The overheat protection function is
activated in increments of 8 points.
• If the function is activated even for
1 point within the range of 8 points,
outputs of all 8 points are turned
off.
Available
(overheat protection function,
overload protection function)
• The overheat protection function is
activated in increments of 2 points.
• The overload protection function is
activated in increments of 1 point.

External
power
supply
Voltage
12/24VDC
(10.2 to 26.4VDC)
12-24VDC
(10.2 to 28.8VDC)
(ripple ratio within 5%)

Current
80mA
(typ. 24VDC for each common)
40mA (24VDC) 
External connection
system
37-pin D-sub connector
(accessory)
37-pin D-sub connector
(sold separately)

Existing external wiring can be
used.
Note that the connecting direction
of the connector is inverted.
Applicable wire size
0.3mm
2
0.3mm
2
(A6CON1E)

Current consumption 0.50A (typ. all points on) 0.095A (typ. all points on) 
External dimensions 130(H)34.5(W)93.6(D)mm 98(H)27.4(W)90(D)mm
Weight 0.25kg 0.15kg