Omron Sysmac NX-PD1000 User Manual page 72

4 Installation and Wiring
Unit name
Additional I/O Power
Supply Unit
4 - 12
This NX Unit provides additional I/O power supply.
This Unit is used when the I/O power supply for the NX Unit connected to the CPU Unit
is supplied through the NX bus.
Additionally use this NX Unit in the following cases.
(a) When the I/O power supply capacity is insufficient
• When the total current consumption for the I/O power supply exceeds 4 A
• When a voltage drop in the I/O power supply causes the voltage of the I/O power
supply to go below the voltage specifications of the I/O circuits or connected
external devices
(b) Separating the I/O power supply
• When connected external devices have different I/O power supply voltages
Case (a)
Additional I/O Power
NX-series
Supply Unit
NX1P2 CPU Unit
Internal power
I/O power
supply circuit
supply
Unit power
supply
Separated by Additional
I/O Power Supply Unit
*1. The NX Unit to which I/O power is supplied from the NX bus
Case (b)
Additional I/O
Power Supply Unit
NX-series
NX1P2 CPU Unit
NX Unit
Internal power
I/O power
supply circuit
supply
Unit power
supply
• When different I/O power supply voltage are used.
• When separating the power supply systems.
*1. The NX Unit to which I/O power is supplied from the NX bus
The NX Unit power supply of the Additional I/O Power Supply Unit is connected to the
NX Unit on the left through the NX bus connector.
Function
Additional I/O
Power Supply Unit
*1
NX Unit
I/O power
supply
When the I/O power supply becomes
the following states for the subsequent
NX Units.
• When it exceeds 4 A
• When it goes below the voltage specifications
of the connected external devices
Separated by Additional I/O Power Supply Unit
Additional I/O Power Supply Unit
*1
I/O power
supply
NX-series System Units User's Manual (W523)