Omron Sysmac NX-TBX01, Руководство пользователя

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4 Installation and Wiring
NX-series System Units User’s Manual (W523)
4
-5 Wiring
the A
d
d
ition
al Power Sup
p
ly U
n
it
s
4
4-
5-3 Pr
otect
ive Devices
The required power supply capacity for the I/O power supply is calculated as follows.
This section describes the protective devices to protect against short circuits and overcurrents of exter-
nal circuits.
Overcurrent means the current that flows when an excessive load is connected and one of the following
ratings is exceeded.
Refer to the A-1 Data Sheet on page A-2 for details on the ratings for NX-series power sup-
ply-related Units.
Refer to the hardware user’s manual for the connected CPU Unit or the user's manual for the con-
nected Communications Coupler Unit for the ratings of the CPU Unit or the Communications Cou-
pler Unit that can supply NX Unit power.
Refer to the user’s manual for the connected Communications Coupler Unit for the ratings of the
Communications Coupler Unit that can supply I/O power.
Precautions for Safe Use
Use the I/O power supply current for the CPU Rack of NX1P2 CPU Unit at 4 A or less. Using
the currents that are outside of the specifications may cause failure or damage.
 Selecting Protective Devices
Refer to the hardware user’s manual for the connected CPU Unit or the user's manual for the con-
nected Communications Coupler Unit for selecting the protective devices.
Refer to Required Power Supply Capacity on page 4-28 for information on the inrush current that
occurs when external devices connected to an Additional I/O Power Supply Unit are turned ON or
OFF, which is one of the items to consider when you select protective devices.
Power supply capacity of I/O
power supply = (Current consumed by NX-PF0730) + (Current consumed by NX-ID3317)
+ (Current consumed by NX-OD3121)
= 10 mA + 224 mA + 710 mA
= 944 mA
4-5-3 Protective Devices
Unit name of supplying
Unit
Connecting destination
of supplying Unit
Rated item Rating
Additional NX Unit Power
Supply Unit NX1P2 CPU Unit or Com-
munications Coupler Unit NX Unit power supply
capacity Less than the rating of
Additional NX Unit
Power Supply Unit
Current capacity of
power supply terminal
Additional I/O Power Sup-
ply Unit NX1P2 CPU Unit Maximum current of I/O
power supply
4 A max.
*1
*1. When the Additional I/O Power Supply Unit is connected to the CPU Unit, use the I/O power supply current
at 4 A or less, regardless of the Additional I/O Power Supply Unit specifications.
Current capacity of I/O
power supply terminals
Communications Coupler
Unit Maximum current of I/O
power supply Less than the rating of
Additional I/O Power
Supply Unit
Current capacity of I/O
power supply terminals