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MELSEC-Q 
4    I/O COMBINED MODULE 
4.3 QX48Y57 I/O Combined Module 
• When using the module, configure the system according to Section 1.2.3 (2). 
• The module uses sequential I/O numbers for input and output. 
For I/O numbers of I/O combined modules, refer to Section 1.2.3. 
 
(1) DC input specifications (positive common type) 
 
Type 
Specifications 
QX48Y57 I/O combined module (input specifications)  Appearance 
Number of input points  8 points 
 
Isolation method  Photocoupler 
Rated input voltage  24VDC (+20/-15%, ripple ratio within 5%) 
Rated input current  Approx. 4mA 
Input derating  None 
ON voltage/ON current  19V or higher/3mA or higher 
OFF voltage/OFF current  11V or lower/1.7mA or lower 
Input resistance  Approx. 5.6kΩ 
Response 
time 
OFF ON 
1ms/5ms/10ms/20ms/70ms or less (configured in PLC parameter) 1 
(Default: 10ms) 
ON OFF 
1ms/5ms/10ms/20ms/70ms or less (configured in PLC parameter) 1 
(Default: 10ms) 
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 
8 points/common (common terminal: TB9) 
Number of occupied I/O 
points 
16 points (I/O assignment is set as a 16-point I/O combined module.) 
Operation indicator  ON indication (LED) 
External connections 
18-point terminal block (M3 6 screw) 
Applicable wire size 
Core cable: 0.3 to 0.75mm
2
 (Outside diameter: 2.8mm or smaller) 
Applicable crimping terminal  R1.25-3 (Sleeved crimping terminals cannot be used.) 
Internal current consumption 
(5VDC) 
80mA (TYP, all points ON) 
Weight 0.20kg 
 
1: For the setting method, refer to the Section 1.3.1. 
 
 
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QX48Y57
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