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Appendices
NX-series Digital I/O Unit User’s Manual (W521)
A-1 Data Sheet
A
A-1-3 Digital Output Units
Unit name
Transistor Output Unit
Model
NX-OD6121-5
Number of points
32 points
External connection
terminals
MIL connector (40 terminals)
I/O refreshing method
Switching Synchronous I/O refreshing and Free-Run refreshing
Indicators
TS indicator, output indicator
Internal I/O common
NPN
Rated voltage
12 to 24 VDC
Operating load voltage
range
10.2 to 28.8 VDC
Maximum value of load
current
0.5 A/point, 2 A/common, 4 A/NX Unit
Maximum inrush cur-
rent
4.0 A/point, 10 ms max.
Leakage current
0.1 mA max.
Residual voltage
1.5 V max.
ON/OFF response time
0.1 ms max./0.8 ms max.
Dimensions
30 (W) x 100 (H) x 71 (D)
Isolation method
Photocoupler isolation
Insulation resistance
20 MΩ min. between isolated circuits (at
100 VDC)
Dielectric strength
510 VAC between isolated circuits for 1
minute at a leakage current of 5 mA max.
I/O power supply
method
Supply from external source
Current capacity of I/O
power supply terminal
Without I/O power supply terminals
NX Unit power con-
sumption
0.80 W max.
Current consumption
from I/O power supply
50 mA max.
Weight
90 g max.
Circuit layout
Installation orienta-
tion and restrictions
Installation orientation: Possible in 6 orientations.
Restrictions: No restrictions
OUT0
to OUT15
COM0
+V0
OUT16
to OUT31
COM1
+V1
+V0
COM0
+V1
COM1
I/O power
supply +
NX bus
connector
(left)
I/O power
supply −
NX bus
connector
(right)
I/O power
supply +
I/O power
supply −
Internal circuits
Connector