Tense FTV-04 Photocell Relay (Light-Sensing Control System)

The Tense FTV-04 is a high reliability, DIN rail mounted photocell relay kit designed for automated illumination control based on real time ambient lighting conditions. This modular solution comprises an indoor mounted control module and a rugged, weatherized external light sensor lux probe. Together, they optimize energy efficiency across public and commercial outdoor lighting grids.

Key Features

Adjustable Ambient Lux Settings: Features a front facing analog potentiometer dial that allows seamless customization of the light trigger sensitivity window across a 1 to 10 Lux range.
Complete Weather Protected Lux Sensor: Shipped with a heavy duty, dome shaped exterior light sensor probe outfitted with a sturdy L shaped mounting bracket for quick installation on outdoor building facades or poles.
Dual LED Diagnostics Indicator Array:
- ON (Red LED): Illuminates when ambient light drops below the selected Lux value, signaling that the relay’s automation logic has successfully engaged.
- OUT (Green LED): Indicates that the internal contact output mechanism is active, delivering power to light up downstream contactor circuits.
Ultra Narrow Modular Footprint: Its slim profile snaps onto standard 35 mm DIN rail systems, maximizing space efficiency in competitive electrical distribution boxes.
Isolated Probe Protection Circuitry: The terminal connection design utilizes isolated sensor input terminal channels ( $G1, G2$ ) to decouple the outdoor probe wiring from the primary voltage lines ( $A1, A2$ ).

Technical Specifications

Feature	Specification
Model Code	FTV-04
Brand / Manufacturer	Tense Electronics
Device Instrument Typology	Photocell / Twilight Control Relay (Fotosel Rölesi)
Nominal Supply Voltage ( $A1-A2$ )	220V AC @ $50 / 60\text{ Hz}$ power grids
Sensitivity Tuning Scope	Adjustable between 1 – 10 Lux
Relay Output Contacts	1 SPDT changeover dry contact rated at 5A / 250V AC (Resistive Load)
Internal Power Consumption	Energy efficient architecture ( $< 2\text{VA}$ )
Form Factor Compatibility	35 mm Standard DIN rail system
Manufacturing Standards	CE Compliant; Made in Turkey

Applications

Automated Street and Highway Illumination: Integrated into municipal main distribution boxes to orchestrate dusk to dawn streetlamp cycles, saving significant grid energy.
Commercial Signage and Billboards: Automates high power advertisement billboards, store signage arrays, and exterior decorative storefront accent bars without requiring a manual timer readjustment as the seasons change.
Industrial Park Periphery Safety Arrays: Controls perimeter fence illumination, parking zone grids, and logistics bay floodlights, guaranteeing immediate illumination the moment twilight hits.
Residential & Apartment Pathway Corridors: Manages outdoor garden pathways, entry driveways, and apartment block courtyard lighting fixtures to enhance pedestrian safety and property security.