Omron NX-ID User Manual page 294

Appendices
Unit name Transistor Output Unit
Number of points 4 points
I/O refreshing method Switching Synchronous I/O refreshing and Free-Run refreshing
Indicators TS indicator, output indicator
Dimensions 12 (W) x 100 (H) x 71 (D)
Insulation resistance 20 MΩ min. between isolated circuits (at
100 VDC)
I/O power supply Supply from the NX bus
method
NX Unit power con- • Connected to a CPU Unit
sumption
0.90 W max.
• Connected to a Communications Cou-
pler Unit
0.55 W max.
Weight 70 g max.
Circuit layout
NX bus
connector
(left)
Installation orienta- Installation orientation:
tion and restrictions
• Connected to a CPU Unit
Possible in upright installation.
• Connected to a Communications Coupler Unit
Possible in 6 orientations.
Restrictions: No restrictions
A - 44
I/O power supply +
I/O power supply −
Model NX-OD3121
External connection Screwless clamping terminal block (12 ter-
terminals minals)
Internal I/O common NPN
Rated voltage 12 to 24 VDC
Operating load voltage 10.2 to 28.8 VDC
range
Maximum value of load 0.5 A/point, 2 A/Unit
current
Maximum inrush cur- 4.0 A/point, 10 ms max.
rent
Leakage current 0.1 mA max.
Residual voltage 1.5 V max.
ON/OFF response time 0.1 ms max./0.8 ms max.
Isolation method Photocoupler isolation
Dielectric strength 510 VAC between isolated circuits for 1
minute at a leakage current of 5 mA max.
Current capacity of I/O IOV: 0.5 A/terminal max., IOG: 0.5 A/termi-
power supply terminal nal max.
Current consumption 10 mA max.
from I/O power supply
NX-series Digital I/O Unit User's Manual (W521)
IOV0 to 3
OUT0 to OUT3
Terminal block
IOG0 to 3
I/O power supply +
NX bus
connector
I/O power supply −
(right)