• CPU Unit Hardware User’s Manual
• User
’s manual for the Communications Coupler Unit
• User’s manual for the Communication Control Unit
Refer to Required Power Supply Capacity on page 4-34 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.
Installation Locations for Protective Devices
For installation locations for protective devices, refer to the following manuals depending on the
connected Unit.
• CPU Unit Hardware User’s Manual
• User’s manual for the Communications Coupler Unit
• User’s manual for the Communication Control Unit
4 Installation and Wiring
4-39
NX-series System Units User's Manual (W523)
4-6 Wiring the Additional Power Supply Units
4
4-6-3 Protective Devices