5 Installation and Wiring
5 - 12
NX-series Safety Control Unit User’s Manual (Z930)
5-3 Wiring the Terminals
This section describes how to wire the terminals on the Safety I/O Units.
This section describes wiring the screwless clamping terminal blocks, terminal block mounting and
removal methods, and prevention of incorrect attachment.
You can connect ferrules that are attached to twisted wires to the screwless clamping terminal block.
You can also connect twisted wires or solid wires to the screwless clamping terminal block. If you con-
nect the ferrules, all you need to do to connect the wires is to insert the ferrules into the terminal holes.
The following terminals are wired.
• I/O power supply terminals
• I/O terminals
The wires that you can connect to the screwless clamping terminal block are twisted wires, solid wires,
and ferrules that are attached to twisted wires. This section gives the dimensions and processing meth-
ods for applicable wires.
Dimensions of Wires Connected to the Terminal Block
The dimensions of wires that you can connect into the terminal holes of the screwless clamping ter-
minal block are as in the figure below. Process the applicable wires as specified in the following
description to apply the dimensions.
WARNING
Make sure that the voltages and currents that are input to the NX Units and Slave Terminals are
within the specified ranges.
Inputting voltages or currents that are outside of the specified ranges may cause accidents or
fire.
5-3-1 Wiring to the Screwless Clamping Terminal Block
Wiring Terminals
Applicable Wires
1.6 mm max. (Terminals other than ground terminals)
2.0 mm max. (Ground terminals)
2.4 mm max. (Terminals other than ground terminals)
2.7 mm max. (Ground terminals)
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