Omron NXR Series User Manual page 91

Overcurrent is the current that flows when an excessive load is connected and one of the following
ratings is exceeded.
• For the Unit/input power supply and output power supply (common), maximum power supply current
and maximum port current
• For the Unit/input power supply, maximum load current from device power supplies to connected ex-
ternal devices
• For the output power supply, maximum load current of digital outputs for pin 2 or pin 4
Refer to 2-1-3 Unit Specifications on page 2-3 for the above rated values.
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 are turned ON and OFF
• Inrush current when power supply to IO-Link devices is started
Installation Locations for Protective Devices
Install protective devices for each of the Unit/input power supply and output power supply as shown in
the following figure.
NXR-series IO-Link Master Unit for EtherCAT User's Manual (W640)
4 Designing the Power Supply System
4
4-21