Mitsubishi MELSEC-A Series User Manual page 8

3. Handling
3.1 Cable length restrictions between stations
(1) The main modules case is made of plastic, so do not drop it or subject it to strong
impacts.
(2) Do not dismount the printed wiring board from the case. It may damage the module.
(3) When wiring, be careful never to let foreign matter from the above module such as
wiring scraps get inside the module. If something goes in, get rid of it.
(4) The module installation screw should be kept within the following range.
Screw Locations
Module installation screws (M4 screws)
Tightening Torque Range
78 to 118N cm