4-8
Wiring the Shield Connection Unit
The Shield Connection Unit is used when there are not enough terminals to connect the shield for the
connection of external devices.
This section describes how to wire the Shield Connection Unit.
Wiring Terminals
• SHLD terminal
• Functional ground terminals
Wiring Examples
The following shows a wiring example in which the shield wire is used to connect an Incremental En-
coder Input Unit (NX-EC0122) and a rotary encoder to the Shield Connection Unit.
A
Z
B
NC
IOV
IOG
IOV
IOG
I0
I2
I1
NC
IOV
IOG
IOV
IOG
UV
UG
NC
UV
UG
NC
A1
A8 B8
B1 A1
A8
B1
B8
A1
A8
B1
B8
DIN Track
SHLD
SHLD
SHLD
SHLD
SHLD
SHLD
SHLD
SHLD
SHLD
SHLD
SHLD
SHLD
SHLD
SHLD
Additional NX Unit
Power Supply Unit
NX-PD1000
Shield
Connection Unit
NX-TBX01
Incremental Encoder
Input Unit
(Open collector input)
NX-EC0122
Shield
Rotary Encoder
Shield
Shield
Shield
Sensor
Sensor
Sensor
Ground of 100 Ω
or less
Connect the shield of cable to the SHLD terminal.
And ground the functional ground terminal to 100 Ω or less.
Refer to the hardware user
’s manual for the connected CPU Unit for details on grounding the CPU
Rack of CPU Unit.
Refer to the user's manual for the connected Communications Coupler Unit for details on grounding
the Slave Terminal.
Refer to the user’s manual for the connected Communication Control Unit for details on grounding the
CPU Rack of the Communication Control Unit.
4 Installation and Wiring
4-44
NX-series System Units User's Manual (W523)
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