Mitsubishi Electric MELSEC-Q Series - Page 152

3 REPLACEMENT OF I/O MODULE
3 - 99
(b) Specifications comparison between A1SJ-56DT (output part) and QY50
: Compatible, : Partially changed, : Incompatible
Specifications
A1SJ-56DT
(output specifications)
QY50
Compat-
ibility
Precautions for replacement
Number of output points 24 points 16 points
When 17 or more points are
used, use two QY50 modules.
Isolation method Photocoupler Photocoupler 
Output format Sink type Sink type 
Rated load voltage 24VDC 12-24VDC 
Operating load voltage
range
19.2 to 30VDC
(peak voltage 30VDC)
10.2 to 28.8VDC
Voltage exceeding 28.8VDC is
not applicable.
Maximum load current 0.5A/point, 4A/common 0.5A/point, 4A/common 
Maximum inrush current 4A 10ms or less 4A 10ms or less 
Leakage current at off 0.1mA or less 0.1mA or less 
Maximum voltage drop at
off
0.9V (typ.) 0.5A
1.5V (MAX.) 0.5A
0.2VDC (typ.) 0.5A,
0.3VDC (MAX.) 0.5A

Response
time
Off  on 2ms or less 1ms or less 
On  off
2ms or less
(resistance load)
1ms or less
(rated load, resistance load)

Surge suppressor Zener diode Zener diode 
Common terminal
arrangement
8 points/common
(common terminal: TB10, TB20,
TB30)
16 points/common
(common terminal: TB18)
As the number of points per
common is changed to 16, wiring
with a different voltage for each
common is not possible.
Operation indication On indication (LED) On indication (LED) 
Fuse rating
(breaking capacity)
None
6.7A
(1 fuse/common)
Cannot be changed.
(breaking capacity: 50A)

The QY50 does not detect fuse
blown unless the external power
is supplied.
Fuse blown indication
Available
(LED turns on when a fuse is blown
and a signal is output to the CPU
module.)
External
power
supply
Voltage 24VDC (19.2 to 30VDC)
12-24VDC (+20/-15%)
(ripple ratio within 5%)
Voltage exceeding 28.8VDC is
not applicable.
Current
60mA
(typ. 24VDC for each common)
20mA
(24VDC)

External connection
system
34-point terminal block connector
2 pieces (M3.56 screws)
18-point terminal block
(M36 screws)

Wiring change is required.
Applicable wire size
0.75 to 2mm
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.)

Number of occupied
I/O points
128 points
(slot 0: Output 64 points,
slots 1 to 4: Empty 16 points)
16 points
(I/O assignment: Output 16 points)
-
Current consumption 0.22A (typ. all points on) 0.08A (typ. all points on) -
The module configuration differs.
Recalculate the current
consumption.
External dimensions 130(H)174.5(W)65.6(D)mm 98(H)27.4(W)90(D)mm Wiring space is narrower.
Weight 0.70kg 0.17kg