Appendices
A - 124
NX-series Digital I/O Unit User’s Manual (W521)
Note 1. The polarity for input power supply connections
indicated with dotted lines (
-
-
-
-
-
) can be con-
nected in either direction.
2. The COM terminals and +V terminals are inter-
nally connected inside the Unit, but they must all
be wired.
Note 1. Connect the A9/B9 terminal and the terminal.
Connect the A10/B10 terminal and the terminal.
(Use the enclosed short bar.)
2. The COM terminals are wired inside the Connec-
tor-Terminal Block Conversion Unit.
Digital I/O
Unit
NX-MD6121-6
Connec-
tor-Terminal
Block Con-
version Unit
XW2D-20G6
Connecting
Cable
XW2Z-
A
Connection
diagram
A10
A1
A2
A3
A4
A5
A6
A7
A8
A9
B10
B1
B2
B3
B4
B5
B6
B7
B8
B9
CN2
A10
A1
A2
A3
A4
A5
A6
A7
A8
A9
B10
B1
B2
B3
B4
B5
B6
B7
B8
B9
CN1 (OUT)
(IN)
L
L
L
L
L
L
L
L
L
L
L
L
L
L
L
L
07
COM
+V
06
05
04
03
02
01
00
07
COM
NC
06
05
04
03
02
01
00
15
COM
NC
14
13
12
11
10
09
08
15
COM
+V
14
13
12
11
10
09
08
12 to
24 VDC
12 to
24 VDC
24
VDC
24
VDC
Digital I/O
Unit
NX-MD6121-6
Connec-
tor-Terminal
Block Con-
version Unit
XW2C-20G6-IO16
Connecting
Cable
XW2Z-
A
Connection
diagram
0
1
+
2
3
4
5
6
7
8
9
10
11
12
13
14
15
+
A9
B9
−
−
+
−
+
−
+
−
+
−
+
−
+
−
+
−
+
−
+
A10
B10
−
+V
15
14
13
12
11
10
09
08
07
06
05
04
03
02
01
00
Solenoid
valve, etc.
Solenoid
valve, etc.
12 to
24 VDC
CN1
(OUT)
(Short bar)
(Short bar)
COM
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