Omron NX-SIH400, Руководство пользователя

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Additional Information
Power Supply-related Units for the NX-series
The following three NX-series are related to power supply.
• Additional NX Unit Power Supply Unit
• Additional I/O Power Supply Unit
• I/O Power Supply Connection Units
Refer to the
NX-series System Unit User's Manual (Cat. No. W523) for the specifications of
these Units.
For a complete list of the latest power supply Units in the NX-series, refer to the
product catalog
or OMRON websites, or contact your OMRON representatives.
3-2-2
Calculating the Total Current Consumption from I/O Power Sup-
ply
The total current consumption of I/O power supplied from the NX bus must be within the range of the
maximum I/O power supply current of the Communications Coupler Unit or the Additional I/O Power
Supply Unit. Furthermore, for the CPU Rack, this must be less than the maximum I/O power supply
current specified for the CPU Unit. Refer to the hardware user’s manual for the CPU Unit to which the
NX Units are connected for details on restrictions for CPU Racks. To confirm this and to calculate the
I/O power supply capacity, calculate the total current consumption of the I/O power supply from the NX
bus.
To confirm this and to calculate the I/O power supply capacity, calculate the total current consumption
of the I/O power supply from the NX bus.
The total I/O current consumption from the NX bus is the sum of the following: the current consump-
tion from the I/O power supply for the NX Units that receive power from the I/O power supply from the
NX bus, the current consumption of those I/O circuits, and the current consumption of connected ex-
ternal devices.
The current consumption of external connection loads and connected external devices is not included
in the
current consumption from I/O power supply that is given for each model in the datasheets.
The total current consumption from I/O power supply of the Safety Control Unit is calculated as fol-
lows:
•
Total Current Consumption from I/O Power Supply of Safety Input Unit
= (Current consumption from I/O power supply of Safety Input Unit) + (Input current of Safety Input
Unit × Number of inputs used) + (Total current consumption of connected external devices)
• Total Current Consumption from I/O Power Supply of Safety Output Unit
= (Current consumption from I/O power supply of Safety Output Unit) + (Total connected load cur-
rent) + (Total current consumption of connected external devices)
Refer to Section 2 Specifications on page 2 - 1 for the current consumption from I/O power supply of
each model of Safety I/O Unit and the input current for each model of Safety Input Unit.
3 Installation and Wiring
3 - 9
NX-series Safety Control Unit User's Manual (Z930)
3-2 Power Supply T
ypes and W
iring
3