Terminal Block Part Names and Functions
(A)
A1
A2
A3
A4
A5
A6
A7
A8
B1
B2
B3
B4
B5
B6
B7
B8
(B)
(C)
(D)
NX-TBC082
8-terminal type
Letter Name Function
(A) Terminal number indication Indicates the terminal numbers (A1 to A8 and B1 to B8).
The terminal number indication is the same regardless of the number of
terminals on the terminal block.
(B) Release hole Insert a flat-blade screwdriver into this hole when you connect or re-
move the wire.
(C) Terminal hole The wire is inserted into this hole.
(D) Ground terminal mark This symbol indicates that it is the ground terminal.
Refer to 5-4-1 Wiring the Unit Power Supply on page 5-36
and 5-4-8 Wiring to the CPU Unit Terminal
Block on page 5-42 for the wiring procedure.
There are three types of terminal blocks: 8-terminal type, 12-terminal type, and 16-terminal type.
Only the 8-terminal type terminal block can be attached to the NX502 CPU Units.
To prevent mis-insertion, the terminal blocks other than of the 8-terminal type cannot be used.
Additional Information
No terminal and release holes with the numbers A2, A4, A6, A8, B2, B4, B6, and B8 are provid-
ed for the 8-terminal type terminal block.
3-1-6
Battery
The battery is not mounted when the product is shipped.
You need to prepare a battery for the CPU Unit to retain the clock data while the CPU Unit is left pow-
ered of
f for a long period of time.
The following describes the purpose of the battery mounting, the battery model, and the battery-relat-
ed error detection and clock data settings.
3 Configuration Units
3-10
NX-series NX502 CPU Unit Hardware User's Manual (W629)
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