Type 11.91 - Light Dependent Relay

Type 11.91 Light Dependent Relay “twilight switch” for the automatic control of lighting according to the ambient light level – using a separate photosensor.
Auxiliary output, for use with 19.91 Power Module, provides an output directly related to the light level (i.e. without intervention of any time delays).

Features include:

• “Daily” time switch function – programmable to inhibit main output (for energy saving)
• Auxiliary output – directly driven by the photosensor
• Italian patent “Light feedback compensation” principle
• Sensitivity adjustment from 1 to 150 lux
• LCD display for status indication, set-up and programming
• Internal battery for set-up/programming without supply and for time/program back-up in case of power failure (5 years)
• Low stand-by power consumption
• SELV separation between contact and supply circuit
• Double insulation between supply and photosensor
• 35 mm rail (EN 60715) mount
• Cadmium-free contact material
• Cadmium-free photosensor (IC photo diode)