Design: Socket module insert for installation in the VLTM mounting rail. Additional module VLMF . made of extruded aluminum profile, white, silver (-SI) or black (-SW) powder-coated. Spring steel clamps for fastening to the mounting rail. The VLMF . modules can be placed variably between the VLGF . device carriers. Electrical adapter for flexible tapping of the power supply in the mounting rail. Color and optical coding for easy installation. Mechanical coding to prevent incorrect installation (twisting protection).