Selecting Protective Devices - Omron PROFINET NX-PNC202 User Manual

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. 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
Current
6 A
12 A
21 A
30 A
 For IO Power Supply
The following values apply for a Unit which has 10 A of current capacity of the power supply termi-
nals.
Current
14 A
28 A
56A
70 A
The following values apply for a Unit which has 4 A of current capacity of the power supply termi-
nals.
Current
6 A
12 A
21 A
30 A
NX-series PROFINET Coupler Unit User's Manual (W623)
Breaking/fusing time
1 min max.
15 s max.
5 s max.
2.5 s max.
Breaking/fusing time
1 min max.
9 s max.
1.5 s max.
0.8 s max.
Breaking/fusing time
1 min max.
15 s max.
5 s max.
2.5 s max.
5 Designing the Power Supply System
*1
5
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