61 
 
5.3.2  Input/output composite module connections 
 
Model 
Rated Input 
Voltage 
Rated Load 
Voltage 
 
A1SH42 
(1) 
A1SH42-S1 
12/24 VDC  12/24 VDC   
X00
X08
X01
X07
X02
X04
X05
X06
X09
X03
X0A
X0B
X0C
X0D
X0E
X0F
X10
X11
X12
X13
X14
X15
X16
X17
X18
X19
X1A
X1B
X1C
X1D
X1E
X1F
B20 A20
B19 A19
B18 A18
B17 A17
B16 A16
B15 A15
B14 A14
B13 A13
B12 A12
B11 A11
B10 A10
B9 A9
B8 A8
B7
A7
B6 A6
B5 A5
B4 A4
B3 A3
B2 A2
B1 A1
COM
COM
+
−
Vacant
Vacant
Vacant
Vacant
Vacant
Vacant
 
Y00
Y08
Y01
Y07
Y02
Y04
Y05
Y06
Y09
Y03
Y0A
Y0B
Y0C
Y0D
Y0E
Y0F
Y10
Y11
Y12
Y13
Y14
Y15
Y16
Y17
Y18
Y19
Y1A
Y1B
Y1C
Y1D
Y1E
Y1F
B20 A20
B19 A19
B18 A18
B17 A17
B16 A16
B15 A15
B14 A14
B13 A13
B12 A12
B11 A11
B10 A10
B9 A9
B8 A8
B7 A7
B6 A6
B5 A5
B4 A4
B3 A3
B2 A2
B1
A1
12/24VDC +
−
12/24VDC
COM
COM
L
L
L
L
L
L
L
L
L
L
L
L
L
L
L
L
L
L
L
L
L
L
L
L
L
L
L
L
L
L
L
L
Vacant
Vacant
Vacant
Vacant
 
 X   (Input side) 
*1 
 B1   and   B2   are connected internally. 
 
 Y   (Output side) 
*3 
 B1   and   B2   , and   A1   and   A2   , are 
connected internally. 
 
*2  The A and B pin number rows shown above are transposed with respect to the diagram of the A 
and B rows which is printed on the module. Remember that the A row pin numbers correspond to 
the B row of the module.