Mitsubishi Electric MELSEC-Q Series - Page 120

3 REPLACEMENT OF I/O MODULE
3 - 67
(4) Specifications comparison between A1SY18A and QY18A
: Compatible, : Partially changed, : Incompatible
Specifications A1SY18A QY18A
Compat-
ibility
Precautions for replacement
Number of output points
8 points
(16 points occupied)
8 points
(16 points occupied)

Isolation method Photocoupler Relay
The isolation method differs, but
the performance is the
equivalent.
Rated switching voltage/
current
24VDC 2A (resistance load)/point
240VAC 2A (COS=1)/point
8A/module
24VDC 2A (resistance load)/point
240VAC 2A (COS=1)/point
8A/module

Minimum switching load 5VDC 1mA 5VDC 1mA 
Maximum switching
voltage
264VAC 125VDC 264VAC 125VDC 
Response
time
Off  on 10ms or less 10ms or less 
On  off 12ms or less 12ms or less 
Life
Mechanical 20 million times or more 20 million times or more 
Electrical
Rated switching voltage/current load
200,000 times or more
Rated switching voltage/current load
100,000 times or more
Replace the module more
frequently because the life cycle
is reduced by approximately half.
200VAC 1.5A, 240VAC 1A
(COS=0.7) 200,000 times or more
200VAC 0.75 A, 240VAC 0.5A
(COS=0.35) 200,000 times or more
24VDC 1A, 100VDC 0.1A
(L/R=7ms) 200,000 times or more
200VAC 1.5A, 240VAC 1A
(COS=0.7) 100,000 times or more
200VAC 0.4A, 240VAC 0.3A
(COS=0.7) 300,000 times or more
200VAC 1A, 240VAC 0.5A
(COS=0.35) 100,000 times or more
200VAC 0.3A, 240VAC 0.15A
(COS=0.35) 300,000 times or more
24VDC 1A, 100VDC 0.1A
(L/R=7ms )100,000 times or more
24VDC 0.3A, 100VDC 0.03A
(L/R=7ms) 300,000 times or more
Maximum switching
frequency
3600 times/hr 3600 times/hr 
Surge suppressor None None -
Common terminal
arrangement
All points independent common All points independent common 
Operation indication On indication (LED) On indication (LED) 
Fuse None None -
External
power
supply
Voltage
24VDC±10%
Ripple voltage 4Vp-p or less
- 
An external power supply is not
required.
Current
75mA
(typ. 24VDC, all points on)
- 
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 0.24A (typ. all points on) 0.24A (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 0.25kg 0.22kg