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4 Part Names and Functions
NX-series EtherNet/IP Coupler Unit User’s Manual (W536)
4-5 Terminal Blocks
4
4-5 Terminal Blocks
The terminal block on the EtherNet/IP Coupler Unit is a removable screwless clamping terminal block
that allows you to easily connect and remove the wiring.
The Unit power supply, I/O power supply, and ground wire are connected to this screwless clamping
terminal block.
For details, refer to 7-2 Connecting the Power Supply and Ground Wires on page 7-6.
Terminal blocks come in three types depending on the number of terminals that can be used. There are
8-terminal type, 12-terminal type, and 16-terminal type. Only an 8-terminal type can be mounted to the
EtherNet/IP Coupler Unit. To prevent incorrect wire insertion, other terminal blocks cannot be mounted.
On 8-terminal type of terminal blocks, the following terminals do not have terminal holes and
release holes: A2, A4, A6, A8, B2, B4, B6, and B8.
Terminal Block Part Names and Functions
Letter Name Function
(A) Terminal num-
ber indications
The terminal numbers (A1 to A8 and B1 to B8) are displayed.
The terminal number indications are the same regardless of the number of termi-
nals on the terminal block.
(B) Release holes Insert a flat-blade screwdriver into these holes to connect and remove the wires.
(C) Terminal holes The wires are inserted into these holes.
(D) Ground termi-
nal mark
This mark indicates the ground terminals.
8-terminal type
(A)
A1
A2
A3
A4
A5
A6
A7
A8
B1
B2
B3
B4
B5
B6
B7
B8
(B)
(C)
NX-TBC082
(D)
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