Wiring The Power Supply To The Slave Terminal; Power Supply Types; Power Supply Methods And Wiring - Omron NX-SID Series User Manual

5-2 Wiring the Power Supply to the Slave
Terminal
Power is supplied to the Safety Control Units as described in the following table.
5-2-1

Power Supply Types

There are the following two types of power supplies that supply power to the Slave Terminal.
Power supply type
Unit power supply
I/O power supply
5-2-2

Power Supply Methods and Wiring

Power is supplied to the Safety Control Units as described in the following table.
Power supply type
Unit power supply
I/O power supply
NX-series Safety Control Unit User's Manual (Z930)
This power supply is required to generate the NX Unit power supply, which is neces-
sary for the Slave Terminal to operate.
This power supply is connected to the Unit power supply terminals on the Communi-
cations Coupler Unit or Additional NX Unit Power Supply Units.
The internal power supply circuits of the Communications Coupler Unit and Additional
NX Unit Power Supply Units generate the NX Unit power supply from the Unit power
supply.
The internal circuits of the Communications Coupler Unit and of the NX Units operate
on the NX Unit power supply.
The NX Unit power is supplied to the NX Units in the Slave Terminal through the NX
bus connectors.
This power supply drives the internal I/O circuits of the I/O Units and it is also used for
the connected external devices.
This power supply is connected to the I/O power supply terminals on the Communica-
tions Coupler Unit or Additional NX Unit Power Supply Units.
This power supply is used for the following items.
• Operation of I/O circuits of the Safety I/O Units
• Input current to the Safety Input Units
• Load current of external loads of Safety Output Units
• Power for connected external devices
The I/O power is supplied to the I/O Units through the NX bus connectors.
Power is supplied to a Safety Control Unit through the NX bus connectors by connect-
ing a Unit power supply to the Unit power supply terminals on the Communications
Coupler Unit or Additional NX Unit Power Supply Unit.
Power is supplied with the following methods.
Refer to 3-2 Safety I/O Units on page 3-6 for the power supply method for each model
of I/O Unit.
• Supplied from the NX bus.
Power is supplied through the NX bus connectors by connecting an I/O power sup-
ply to the I/O power supply terminals on the Communications Coupler Unit or an
Additional I/O Power Supply Unit.
• Supplied from external source
Power is supplied to the Units from an external source.
I/O power is supplied by connecting an I/O power supply to the I/O power supply ter-
minals on the Units.
5 Installation and Wiring
Description
Description
5
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