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Finder has announced a complete redesign of its 11 Series of modular, light-dependent relays.

For automatic control of lighting, according to ambient light levels detected by an external photoelectric sensor, the 11 Series comprises four compact, rail-mounted relays designed to optimise control schemes and boost energy saving.

Relay contact capacity for the series has been increased, now supporting 2000W for use with incandescent or halogen lamps and 750W for fluorescent lamps.

For increased protection, 11 Series products also feature SELV separation between the supply and relay contacts as well as double isolation between the supply and the photoelectric sensor.

With a module width of 17.5mm, the slimline 11.31 relay provides a single 16A, normally open contact and an adjustable sensitivity from 1 to 100 lux.

A low-power product, the relay consumes 300mW in standby mode.

The 11.41 relay provides a single 16A changeover contact and a selector switch with four preset lighting positions: standard (1-80 lux), extra (30-1000 lux), on (for installation, testing and maintenance) and off (for holiday periods).

The relay also includes two zero hysteresis for enhanced energy saving, and light feedback compensation for simpler installation and use.

The 11.42’s two independent outputs with individual lux settings are suitable for installations requiring artificial lighting to activate at different levels of ambient lux.

Contacts are 12A-rated, one changeover and one normally open, and the relay features the same selector switch as the 11.41.

The 11.91 also features two outputs, an auxiliary which follows the photoelectric sensor and 16A changeover contact, controllable by both the sensor and a built-in daily timer.

This facility means that shop signage can remain lit during the night, while the window display can be switched off outside trading hours.

The relay integrates an LCD panel for timer setup and programming, sensitivity adjustment from 2 to 150 lux and Finder’s light feedback compensation.

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