Yaskawa 120 Series I/O Modules - Manual (Page 234)

6.1 Installing Modules
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Make sure that all mounting screws for the terminal block are securely tightened.
Loose screws may cause malfunction of the GL120 and GL130.
Use the following procedures to install the terminal block for the Module.
a) Make sure that the Module is correctly installed on the Mounting Base.
b) Turn OFF the power (power supply for input signals and power supply for driving
loads) to the Module.
c) Install the terminal block on the Module as shown below.
(1) Fit the terminal block onto the Module.
(2) Tighten two terminal-block mounting screws alternately.
(3) Tighten the terminal block mounting screws until the terminal block closely
attaches to the Module as shown in the following figure.
(4) Close the terminal block cover.
CAUTION
Terminal block
Module Fit in
Terminal block mounting screw
Terminal block mounting screw
Terminal block
Module