Omron NX-OD5256 User Manual

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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-OD3121
Number of points 4 points External connection
terminals
Screwless clamping terminal block (12 ter-
minals)
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/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 12 (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 the NX bus Current capacity of I/O
power supply terminal
IOV: 0.5 A/terminal max., IOG: 0.5 A/termi-
nal max.
NX Unit power con-
sumption
0.55 W max. Current consumption
from I/O power supply
10 mA max.
Weight 70 g max.
Circuit layout
Installation orienta-
tion and restrictions
Installation orientation: Possible in 6 orientations.
Restrictions: No restrictions
Terminal connection
diagram
Disconnec-
tion/Short-circuit
detection
Not supported. Protective function Not supported.
OUT0 to OUT3
IOV0 to 3
IOG0 to 3
Terminal block
Internal circuits
NX bus
connector
(left)
I/O power supply +
I/O power supply −
I/O power supply +
I/O power supply −
NX bus
connector
(right)
Two-wire type
Three-wire type
24 VDC
Transistor Output
Unit
NX-OD3121
Additional I/O
Power Supply Unit
IOV
IOG
IOV
IOG
IOV
IOG
IOV
IOG
OUT0
IOG0
IOV2
IOV0
A1 B1
A8 B8
OUT2
IOG2
OUT1
IOG1
IOV3
IOV1
OUT3
IOG3
A1 B1
A8 B8

Omron NX-OD5256 Specifications

General

Brand	Omron
Model	NX-OD5256
Category	I/O Systems
Language	English