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MELSEC-Q 
3   OUTPUT MODULE SPECIFICATIONS 
3.11 QY68A Transistor Output Module (All Points Independent, Sink/Source Type) 
Type 
Specifications 
Transistor output module (All points independent, sink/source type) 
QY68A Appearance 
Number of output points  8 points 
 
Isolation method  Photocoupler 
Rated load voltage  5-24VDC (+20/-10%) 
Maximum load current  2A/point, 8A/unit 
Maximum inrush current  8A, 10ms or less 
Leakage current at OFF  0.1mA or less 
Maximum voltage drop at ON  0.3VDC (MAX.) 2A 
Response time 
OFF to ON  3ms or less 
ON to OFF  10ms or less (resistive load) 
Surge suppressor  Zener diode 
Fuse 
None (Attaching a fuse to external wiring is recommended. Refer to 
Section 1.2) 
External supply power  None 
Dielectric withstand voltage  560VAC rms/3 cycles (altitude 2000m) 
Insulation resistance  10MΩ or more by insulation resistance tester 
Noise immunity 
By noise simulator of 500Vp-p noise voltage, 1 s noise width 
and 25 to 60Hz noise frequency 
First transient noise IEC61000-4-4: 1kV 
Protection degree  IP2X 
Common terminal arrangement  All points Independent 
Number of occupied I/O points  16 points (I/O assignment is set as a 16-point output module.) 
Operation indicator  ON indication (LED) 
External connections  18-point terminal block (M3 6 screws) 
Applicable wire size  0.3 to 0.75mm
2
 core (2.8mm OD max.) 
Applicable crimping terminal  R1.25-3 (Sleeved crimping terminals cannot be used.) 
Internal current consumption 
(5VDC) 
110mA (TYP. all points ON) 
Weight 0.14kg 
 
External connection  Terminal block No.  Signal name  
 
TB1 
Y00 
TB2 
TB3 
Y01 
TB4 
TB5 
Y02 
TB6 
TB7 
Y03 
TB8 
TB9 
Y04 
TB10 
TB11 
Y05 
TB12 
TB13 
Y06 
TB14 
TB15 
Y07 
TB16 
TB17 Vacant 
TB18 Vacant 
 
 
QY68A
5/12/
24VDC 
2A
01234567
0
1
2
3
4
5
6
7
8
9
A
B
C
D
E
F
L
0
NC
NC
L
1
L
2
L
3
L
4
L
5
L
6
L
7