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4 Installation and Wiring
4 - 30
NX-series System Units User’s Manual (W523)
Calculation Example for Power Supply Capacity of I/O Power Supply
An example of calculating the required power supply capacity of the I/O power supply is given
below.
(a) Configuration and Conditions
I/O power is supplied to the NX-ID3317 and NX-OD3121 from the NX bus.
(b) Unit Specifications
(c) Calculations
The current consumption from the I/O power supply for each Unit is calculated as follows.
Item
Condition
I/O power supply voltage
24 VDC
Inputs
Number of inputs used (that turn ON simultane-
ously)
4 points
Current consumption of connected input devices
50 mA/point
Outputs
Number of outputs (that turn ON simultaneously)
4 points
Load current of connected loads
125 mA/point
Current consumption of connected output devices
50 mA/point
Model
Current consumption from I/O power supply
Input current
NX-PF0730
10 mA
---
NX-ID3317
0 mA
6 mA/point
NX-OD3121
10 mA
---
NX-PF0730 Current Con-
sumption
= (Current consumption from I/O power supply)
= 10 mA
NX-ID3317 Current Consump-
tion
= (Current consumption from I/O power supply) + (Input current x Number of
inputs used) + (Total current consumption of connected input devices)
= 0 mA + (6 mA x 4 points) + (50 mA x 4 points)
= 224 mA
NX-OD3121 Current Con-
sumption
= (Current consumption from I/O power supply) + (Total load current of con-
nected loads) + (Total current consumption of connected output devices)
= 10 mA + (125 mA x 4 points) + (50 mA x 4 points)
= 710 mA
I/O power
supply
(24 VDC)
Additional I/O
Power Supply Unit
NX-PF0730
End Cover
Digital Input
Unit
NX-ID3317
Connected
input
devices
Digital
Output Unit
NX-OD3121
Connected
output
devices
(loads)
Summary of Contents for Sysmac NX-TBX01
Page 7: ...5 CONTENTS NX series System Units User s Manual W523 ...
Page 34: ...Sections in this Manual 34 NX series System Units User s Manual W523 ...
Page 48: ...2 Specifications 2 4 NX series System Units User s Manual W523 ...
Page 116: ...4 Installation and Wiring 4 56 NX series System Units User s Manual W523 Unit ...
Page 136: ...6 Inspection and Maintenance 6 6 NX series System Units User s Manual W523 ...
Page 158: ...Appendices A 22 NX series System Units User s Manual W523 Installation Height 100 71 Unit mm ...
Page 166: ...Appendices A 30 NX series System Units User s Manual W523 ...
Page 167: ...I 1 I NX series System Units User s Manual W523 Index ...
Page 170: ...I 4 NX series System Units User s Manual W523 Index ...
Page 171: ......