Appendices
A - 18
NX-series Digital I/O Unit User’s Manual (W521)
Installation orienta-
tion and restrictions
Installation orientation: Possible in 6 orientations.
Restrictions: As shown in the following.
Terminal connection
diagram
Disconnec-
tion/Short-circuit
detection
Not supported. Protective function Not supported.
0
60504030201005545
6050403020100
16
8
4
0
12
5545
16
8
4
12
Number of simultaneously ON input points vs.
Ambient temperature characteristic
Number of simultaneously ON input points vs.
Ambient temperature characteristic
16 points at 45°C
16 points at 45°C
12 points at 45°C
16 points at 40°C
7 points at 55°C
12 points at 55°C
Ambient temperature
Ambient temperature
• For upright installation
• For any installation other than upright
28.8 V
I/O power supply voltage
Number of simultaneously ON input points
Number of simultaneously ON input points
I/O power supply voltage
24 V
28.8 V
(°C)
(°C)
1
5
9
3
7
11
15
17
19
13
NC
IN15
IN13
COM
IN14
IN12
IN10
IN09
IN08
IN11
2
6
10
4
8
12
16
18
20
14
Connector
pin
Signal
name
Signal
name
24 VDC
NC
IN07
IN05
COM
IN06
IN04
IN02
IN01
IN00
IN03
• The polarity of the input power supply can be connected in either direction.
• Be sure to wire both pins 3 and 4 (COM), and set the same polarity for both pins.
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