A - 73
Appendices
NX-series Digital I/O Unit User’s Manual (W521)
A-1  Data Sheet
A
A-1-3  Digital Output Units
Terminal connection 
diagram
Disconnec-
tion/Short-circuit 
detection
Not supported. Protective function With load short-circuit protection.
1
5
9
3
7
11
15
17
19
13
COM1 (+V)
OUT31
OUT29
0V1
OUT30
OUT28
OUT26
OUT25
OUT24
OUT27
2
6
10
4
8
12
16
18
20
14
21
25
29
23
27
31
35
37
39
33
22
26
30
24
28
32
36
38
40
34
COM1 (+V)
OUT23
OUT21
0V1
OUT22
OUT20
OUT18
OUT17
OUT16
OUT19
COM0 (+V)
OUT15
OUT13
0V0
OUT14
OUT12
OUT10
OUT09
OUT08
OUT11
COM0 (+V)
OUT07
OUT05
0V0
OUT06
OUT04
OUT02
OUT01
OUT00
OUT03
Connector
pin
Signal
name
Signal
name
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
• Be sure to wire both pins 21 
and 22 (COM0 (
+
V)).
• Be sure to wire both pins 1 
and 2 (COM1 (
+
V)).
• Be sure to wire both pins 23 
and 24 (0V0).
• Be sure to wire both pins 3 
and 4 (0V1).
24 VDC
24 VDC