4-6-1
Wiring the Additional NX Unit Power Supply Unit
This section describes how to wire Additional NX Unit Power Supply Unit.
Wiring Terminals
• Unit power supply terminals
• Functional ground terminals
Wiring Examples
The Unit power supply is connected to the Unit power supply terminal (UV/UG).
You can use the
unwired terminals of the Unit power supply terminals for through-wiring to the Unit
power supply terminals on an Additional NX Unit Power Supply Unit, other CPU Units to which NX
Units can be connected, other Communications Coupler Units or another Communication Control Unit.
Make the current supplied from the unwired terminals meet the following conditions.
"Current supplied from unwired terminals" ≤ "Current capacity of power supply terminal" - "Current
consumption of Additional NX Unit Power Supply Unit block"
Refer to Required Power Supply Capacity on page 4-29 for information on the block.
Additional NX Unit
Power Supply Unit
NX-PD1000
NC NC
A1
B1
A8 B8
Through-wiring for unwired terminals
UV UV
UG UG
Ground of 100 Ω
or less
24 VDC
Unit power supply
Ground the functional ground terminal to 100 Ω or less.
Power Supply Used
24 VDC power is supplied to the Unit power supply terminals. The power supply voltage range for the
Unit power supplies is as follows.
Model Power supply voltage range
NX-PD1000 20.4 to 28.8 VDC
Use an SELV power supply that meets the following conditions for the Unit power supply.
4 Installation and Wiring
4-28
NX-series System Units User's Manual (W523)
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