Omron NX-OD5256 User Manual

4 Installation and Wiring
4 - 14
NX-series Digital I/O Unit User’s Manual (W521)
I/O Power Supply Con-
nection Unit
This NX Unit is used when there are not enough I/O power supply terminals for the
connected external devices that are connected to NX Units such as Digital I/O Units
and Analog I/O Units.
* Wire colors have been changed according to revisions in the JIS standards for photoelectric
and proximity sensors. The colors in parentheses are the wire colors prior to the revisions.
Unit name Function
I/O power
supply
DC Input Units
(NPN type)
Two-wire sensor*
(e.g., limit switch)
Communications
Coupler Unit
NX Unit
Three-wire sensor
with NPN output*
(e.g., photoelectric sensor
or proximity sensor)
Brown (White)
Blue (Black)
Black (White)
Brown (Red)
Blue (Black)
I/O Power Supply
Connection Unit
(16 IOG terminals)
Example of NPN type
Not enough I/O power
supply terminals
I/O Power Supply
Connection Units
IOV
A1
A8
B1
B8
A1
A8
B1
B8
A1
A8
B1
B8
IOV
IOV
IOV
IOV
IOV
IOV
IOV
IOV
IOV
IOV
IOV
IOV
IOV
IOV
IOV
IOV
IOG
IOG
IOG
IOG
IOG
IOG
IOG
IOG
IOG
IOG
IOG
IOG
IOG
IOG
IOG
IOG
1
9
7
5
3
13
11
15
0
8
6
4
2
12
10
14
I/O power supply is not separated at
the I/O Power Supply Connection Units.
Additional I/O
Power Supply Unit
Unit power
supply
I/O power
supply
Internal
power
supply
circuit
I/O Power Supply
Connection Unit
(16 IOV terminals)

Omron NX-OD5256 Specifications

General

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