The interface CH-PWM1-IW is a Cresnet control module to dim a single channel low voltage LED light. Additional inputs allow local control via pushbuttons or a potentiometer with feedback to the Control System. The CH-PWM1-IW has an additional output to connect a slave module CH-PWM3S-IW to control multiple LED fixtures on the same circuit or to have more power. The compact design allows installation in a single gang European electrical backbox.