Light Value Switch NLW 1: Daylight-dependent switch device

The device switches a group of lights dependent of the daylight. The Light Sensor mounted outside or near the window monitors the daylight and switches ON or OFF when the artificial light falls or exceeds its adjustable value.
Various devices with different adjusted switch threshold can be operated with a single light sensor.

Light Value Switch NLW 3:

Daylight-dependent 3-channel switching device

Same function as NLW 1, however for 3 independent electrical circuits

Light Value-Control Switch NLR: Mixed light dependent switching device

The device switches a group of lights depending from the mixlight which is composed of daylight and artificial light. The Light Sensor mounted inside the room monitors the light value at a reference point and switches the artificial light ON or OFF when the mixlight falls or exceeds its adjustable value. Through the control of light value at a representative place in the room you can reach a more precise switching as by dependence just from daylight.

Constant Light Control NLK2: Mixed light dependent automatic controls

The Light Sensor mounted inside the room gets the momentarily light value which is composed of daylight and artificial light. This value is compared to the choosen light value on the device and the control dims accordingly lower or higher to reach the choosen level, so a constant light value can be reached. If the daylight reaches a higher value and the artificial light stays for several minutes at minimum, the device switches OFF through the integrated relay. A chooseable re-switch-lock (jumper or switch) can prevent the device to switch ON automatically in an unused room.

The device unites the functions of the pushbutton control devices NT 32 (Functions: BRIGHTER-DARKER-PRESET-ON/OFF) and the Constant Light Control NLK2. By pressing a pushbutton you can switch between the functions of the Pushbutton Control and the Light Constant Control. The automatic function status is shown through a LED in accompanied control tableau FS 38.

Light Sensors (Photocells)

Light sensors serve as the light value registration for
daylight-dependent automatic controls.

Types:
LF/a Light sensor - Wall mounted, IP 40
LF/b Light sensor - Wall mounted water protected, IP 55
LF/c Light sensor - Wall recessed, IP 40
LF/d Light sensor - Wall recessed, IP 40
LF/w Light sensor - Wall mounted, IP 55