Mitsubishi Electric NZ2GF2S-60MD4 User Manual page 36

Do not slide modules from the edge of the DIN rail when mounting them. The modules may be damaged.
5 INSTALLATION AND WIRING
34
5.3 Installation
7.
Hold the DIN rail stopper in the direction opposite to the
arrow on the stopper and tighten the screw with a driver.
8.
Install the DIN rail stopper on the right side of the
module in the same procedure.
Pay attention to install the DIN rail stopper upside down for
the right side.