8-terminal type
(A)
A1
A2
A3
A4
A5
A6
A7
A8
B1
B2
B3
B4
B5
B6
B7
B8
(B)
(C)
Letter Name Function
(A) Terminal number
indications
The terminal numbers are given by column letters A and B, and row numbers 1 to 8.
The combination of the
"column" and "row"
gives the terminal numbers from A1 to
A8 and B1 to B8.
The terminal number indicators are the same regardless of the number of terminals
on the terminal block, as shown above.
(B) Release hole Insert a flat-blade screwdriver into these holes to connect or remove the wires.
(C) Terminal hole The wires are inserted into these holes.
Only 8-terminal type blocks can be inserted to the terminal blocks of Safety Output Units.
To prevent incorrect insertion, terminal blocks in any other types besides the 8-terminal type cannot be
mounted.
Additional Information
The 8-terminal type does not have terminal holes and release holes for following terminal num-
bers.
• A2, A4, A6, A8, B2, B4, B6, and B8.
There are two types of Terminal Blocks in terms of current capacity, 10 A for the NX-TB£££2 Termi-
nal Blocks and 4 A for the NX-TB
£££1 Terminal Blocks.
To differentiate between the two types of Terminal Blocks, use the terminal number column indications.
The Terminal Block with white letters on a dark background is the NX-TB£££2 Terminal Block.
You can mount either type of Terminal Block to a Unit with a terminal current capacity of 4 A.
You can only mount the NX-TB£££2 Terminal Block to the Units that the current capacity specifica-
tion of the terminals is greater than 4 A.
• Applicable Terminal Blocks for Each Unit Model
The following table gives the Terminal Blocks that are applicable to each Unit.
2 Specifications
2 - 37
NX-series Safety Control Unit User's Manual (Z930)
2-3 Safety Output Unit
2
2-3-2 Part Names and Functions
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