5 - 19
5 Designing the Power Supply System
NX-series PROFINET Coupler Unit User’s Manual (W623)
5-4 Selecting External Pow
er Supplies and Protective Devices
5
5-4-3 Selecting Protective Devices
Consider the following items when you select protective devices.
• Protective device specifications (breaking/fusing, detection characteristics, steady current value, etc.)
• Inrush current when power is turned ON
• Inrush current when connected external devices turn ON and OFF
*1
*1. Refer to
5-3-4 Restrictions on Inrush Current for ON/OFF Operation
on page 5-14 for information on the
inrush current when connected external devices are turned ON and OFF.
For the breaking/fusing time, use protective devices that meet the conditions in the following table.
For Unit Power Supply
For IO Power Supply
The following values apply for a Unit which has 10 A of current capacity of the power supply termi-
nals.
The following values apply for a Unit which has 4 A of current capacity of the power supply termi-
nals.
Selecting Protective Devices
Current
Breaking/fusing time
6 A
1 min max.
12 A
15 s max.
21 A
5 s max.
30 A
2.5 s max.
Current
Breaking/fusing time
14 A
1 min max.
28 A
9 s max.
56A
1.5 s max.
70 A
0.8 s max.
Current
Breaking/fusing time
6 A
1 min max.
12 A
15 s max.
21 A
5 s max.
30 A
2.5 s max.
Summary of Contents for PROFINET NX-PNC202
Page 9: ...7 NX series PROFINET Coupler Unit User s Manual W623 CONTENTS...
Page 12: ...Manual Structure 10 NX series PROFINET Coupler Unit User s Manual W623...
Page 32: ...Revision History 30 NX series PROFINET Coupler Unit User s Manual W623...
Page 34: ...Sections in this Manual 32 NX series PROFINET Coupler Unit User s Manual W623...
Page 126: ...6 Installation 6 32 NX series PROFINET Coupler Unit User s Manual W623...
Page 192: ...10 I O Refreshing 10 6 NX series PROFINET Coupler Unit User s Manual W623...
Page 224: ...11 PROFINET Coupler Unit Functions 11 32 NX series PROFINET Coupler Unit User s Manual W623...
Page 260: ...12 Troubleshooting 12 36 NX series PROFINET Coupler Unit User s Manual W623...
Page 268: ...13 Maintenance and Inspection 13 8 NX series PROFINET Coupler Unit User s Manual W623...
Page 274: ...Appendices A 6 NX series PROFINET Coupler Unit User s Manual W623...
Page 275: ...I 1 I I NX series PROFINET Coupler Unit User s Manual W623 Index...
Page 280: ...I 6 NX series PROFINET Coupler Unit User s Manual W623 Index...
Page 281: ......