Caution
Mount the DIN rail horizontally.
When DIN rail is mounted vertically, be sure to use commercially available fastening plates at the
end of DCL-33A series. Mount the DCL-33A series to the DIN rail so that the DCL-33A series may
be fixed. However, if the DIN rail is mounted horizontally in a position susceptible to vibration
or shock, the fastening plates must be used as well.