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6 Installation
6 - 28
NX-series EtherCAT Coupler Unit User’s Manual (W519)
Supplying I/O Power from External Sources
Observe the following points when wiring external I/O signal lines.
• To absorb reverse electromotive force when an inductive load is connected to an output signal, con-
nect a surge suppressor near the inductive load in an AC circuit, or connect a diode near the induc-
tive load in a DC circuit.
• Never bundle I/O cables with high-voltage or power lines, and do not route them in close proximity or
parallel to such lines. If output signal lines must be routed in close proximity to such lines, place them
in separate ducts or conduits. Be sure to ground the ducts or conduits.
• If the signal lines and power lines cannot be routed in separate ducts, use shielded cable. Connect
the shield to the ground terminal at the EtherCAT Slave Terminal, and leave it unconnected at the
input device.
• Wire the lines so that common impedance does not occur. Such wiring will increase the number of
wires, so use common return circuits. Use thick wires with sufficient allowance for the return circuits,
and bundle them with lines of the same signal level.
• For long I/O lines, wire the input and output signal lines separately.
• Use twisted-pair wires for pilot lamps (and particularly lamps with filaments).
Wiring External I/O Signal Lines
Unit power supply for EtherCAT Slave Terminal
Power supply for output circuits of EtherCAT Slave Terminal
Power supply for input circuits of EtherCAT Slave Terminal
Power Supply System Diagram
Power circuits
Noise
filter
Power supply for general operations circuits
Outlet (for peripheral devices)
Input Signal Noise Countermeasures
DC
Input
Unit
Inductive
load
Diode
Connect a diode in a DC circuit.
Output Signal Noise Countermeasures
Output
Unit
Output
Unit
Connect a diode
in a DC circuit.
Connect a surge
suppressor in an AC circuit.
Inductive
load
Diode
Inductive
load
Surge
suppressor
I/O Cable Arrangement
Floor ducts
Conduits
Suspended ducts
I/O cables
I/O cables
Power lines
Power lines
I/O cables
Power lines
Summary of Contents for NX-ECC201
Page 38: ...Sections in this Manual 36 NX series EtherCAT Coupler Unit User s Manual W519...
Page 46: ...1 EtherCAT Networks 1 8 NX series EtherCAT Coupler Unit User s Manual W519...
Page 56: ...2 Features and System Configuration 2 10 NX series EtherCAT Coupler Unit User s Manual W519...
Page 82: ...4 Part Names and Functions 4 14 NX series EtherCAT Coupler Unit User s Manual W519...
Page 100: ...5 Designing the Power Supply System 5 18 NX series EtherCAT Coupler Unit User s Manual W519...
Page 214: ...9 Setting Up Slave Terminals 9 44 NX series EtherCAT Coupler Unit User s Manual W519...
Page 254: ...11 EtherCAT Coupler Unit Functions 11 30 NX series EtherCAT Coupler Unit User s Manual W519...
Page 278: ...12 Communications Performance 12 24 NX series EtherCAT Coupler Unit User s Manual W519...
Page 340: ...14 Maintenance and Inspection 14 8 NX series EtherCAT Coupler Unit User s Manual W519...
Page 400: ...Appendices A 60 NX series EtherCAT Coupler Unit User s Manual W519...
Page 401: ...Index 1 NX series EtherCAT Coupler Unit User s Manual W519 I Index...
Page 405: ......