4-5
Wiring of Grounding
This section describes how to ground the CPU Rack and the Slave Terminal.
Units with Functional Ground Terminals in CPU Rack of CPU Unit
Some of the Units in a CPU Rack of the NX-series CPU Unit have the following functional ground ter-
minals.
• CPU Unit
• Additional NX Unit Power Supply Unit
• Shield Connection Unit
Additional Information
A Shield Connection Unit is used to connect the shield when connecting to external input devi-
ces. You can ground more than one shield to the same ground pole to reduce the amount of
wiring work for grounding.
Refer to the hardware user’s manual for the connected CPU Unit for the details on the ground termi-
nals for the CPU Rack.
Units with Functional Ground Terminals in Slave Terminal
Some of the NX Units in a Slave Terminal have the following functional ground terminals.
• Communications Coupler Unit
• Additional NX Unit Power Supply Unit
• Shield Connection Unit
Additional Information
A Shield Connection Unit is used to connect the shield when connecting to external input devi-
ces. You can ground more than one shield to the same ground pole to reduce the amount of
wiring work for grounding.
Refer to the user's manual for the connected Communications Coupler Unit for details on grounding
the Slave Terminal.
Units with Functional Ground Terminals in CPU Rack of Communi-
cation Control Unit
Some of the Units in a CPU Rack of the NX-series Communication Control Unit have the following
functional ground terminals.
• Communication Control Unit
• Additional NX Unit Power Supply Unit
• Shield Connection Unit
4 Installation and Wiring
4-25
NX-series System Units User's Manual (W523)
4-5 Wiring of Grounding
4
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