Mitsubishi Electric MELSEC-A series User Manual page 59

Rated Input
Model
(8)
A1S42X 12/24 VDC
Input terminals
X38 X30 X28 X20 X18 X10 X08 X00
X39 X31 X29 X21 X19 X11 X09 X01
X3A X32 X2A X22 X1A X12 X0A X02
X3B X33 X2B X23 X1B X13 X0B X03
X3C X34 X2C X24 X1C X14 X0C X04
X3D X35 X2D X25 X1D X15 X0D X05
X3E X36 X2E X26 X1E X16 X0E X06
X3F X37 X2F X27 X1F X17 X0F X07
DC 12/24V
* If there will be cases where two or more switches
are pressed simultaneously, install a diode at each
switch (see right).
Voltage
Pin No.
B12 XD0
A12 XD1
B11 XD2
A11 XD3
B10 XD4
A10 XD5
B9 XD6
A9 XD7
B8 XSCN0
A8 XSCN1
B7
XSCN2
XSCN3
A7
B6
XSCN4
A6 XSCN5
B5
XSCN6
A5 XSCN7
B3, A3
B2, A2
Internal
control
circuit
Internal
control
circuit
Internal
control
1/8th duty
45
Pin Arrangement
B12
A12
B11
A11
B10
A10
B9
A9
B8
A8
B7
A7
B6
A6
B5
A5
B4
A4
B3
A3
B2
A2
B1
A1
Seen from front
face of the module
Pin Signal Pin Signal
No. Name No. Name
B12 XD0 A12 XD1
B11 XD2 A11 XD3
B10 XD4 A10 XD5
B9 XD6 A9 XD7
B8 XSCN0 A8 XSCN1
B7 XSCN2 A7 XSCN3
B6 XSCN4 A6 XSCN5
B5 XSCN6 A5 XSCN7
B4 Vacant A4 Vacant
12/24 12/24
B3 A3
VDC VDC
B2 0V A2 0V
B1 FG A1 FG