Motorisation of Window Coverings
using Somfy Motors
Wiring Considerations
LS40 and LT 50 Motors
Do not wire Somfy motors and controls without first consulting the wiring diagrams.
Determine which of the drown and black wires correspond to the UP and DOWN
direction prior to the final wiring.
Connect the Earth Wire.
Check that the wire size is in accordance to the number and electrical rating of motors
as outlined in local authority guidelines.
Consider climatic conditions such as temperature and humidity when installing Somfy
controllers. Install control boxes indoors, or use waterproof boxes for outdoor
installations.
Do Not use other switches and controls other than those recommended by Somfy.
When using a Somfy control box plug in type, make sure the power supply is
switched off before plugging in.
! Use one switch per motor. Do not wire one motor to several switches without
using the appropriate Somfy electronic control!
Problem
When ‘switch 1’ is turned to the UP position, the motor will turn. When it reaches its
pre-set position, micro-switch “M1’ will open and the motor will stop.
If ‘switch 2’ is then turned to the down position, the motor will turn in the opposite
direction. Micro-switch ‘M1’ will close. This will cause the capacitor to short circuit
through micro-switch ‘M1’ and ‘switch 1’.
This will damage the contacts in the micro-switch.
Solution
Use Somfy CD4 or other Somfy electronic controller
