Connecting The Power Supply And Ground Wires; Wiring The Ethercat Coupler Unit - Omron NX-ECC201 User Manual

7 Wiring
7-2 Connecting the Power Supply and
Ground Wires
This section describes how to wire the power supplies and ground the EtherCAT Slave Terminal.
7-2-1

Wiring the EtherCAT Coupler Unit

The wiring of the power supply and ground to the EtherCAT Coupler Unit is shown in the following fig-
ure.
Unit power
supply
(24 VDC)
I/O power supply
(5 to 24 VDC)
Ground to
100 Ω or less
 Unit Power Supply Terminals
These terminals are connected to the Unit power supply. The details are given in the following table.
Terminal number
indication
A1 or B1
A3 or B3
You can use the unwired terminals for through-wiring to an Additional NX Unit Power Supply Unit or
to the Unit power supply terminals on another EtherCAT Coupler Unit. Make the current supplied
from the unwired terminals meet the following conditions.
Current supplied from unwired terminals = Current capacity of power supply terminals − Current
consumption of the EtherCAT Coupler Unit block
Refer to 5-4-1 Selecting the Unit Power Supply on page 5-15 for details on blocks.
 I/O Power Supply Terminals
These terminals are connected to the I/O power supply. The details are given in the following table.
Terminal number
indication
A5
B5
Provide a power supply voltage that is within the power supply voltage specifications of the NX Unit
I/O circuits and connected external devices.
7 - 8
A1 B1
UV UV
UG UG
IOV IOG
A8 B8
Terminal name
UV Connect the 24-VDC wire (positive side) from the Unit power
supply to either the A1 or B1 terminal.
UG Connect the 0-VDC wire (negative side) from the Unit power
supply to either the A3 or B3 terminal.
Terminal name
IOV Connect the 5 to 24-VDC wire (positive side) from the I/O
power supply.
IOG Connect the 0-VDC wire (negative side) from the I/O power
supply.
Through-wiring for unwired
terminals
Description
Description
NX-series EtherCAT Coupler Unit User's Manual (W519)