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11.31.8.230.0000 Finder Modular light relay 1pole 16A 120/230V
Finder 11.31.8.230.0000 is a 110–230 V AC modular light-dependent relay with a 16 A normally open contact, adjustable 1–100 lx sensitivity and timed switching for automatic lighting control.
£35.30
Why Choose the Finder 11.31.8.230.0000 Light-Dependent Relay?
The Finder 11.31.8.230.0000 is a compact and reliable modular light-dependent relay designed to switch lighting automatically according to ambient light levels. Part of the Finder 11 Series, this twilight switch is suitable for energy-efficient lighting control in commercial, industrial and building-services applications.
The relay works with an external photosensor to monitor ambient illumination and operate connected lamps when the selected light threshold is reached. Its adjustable sensitivity range of 1–100 lx allows the switching point to be configured for different environments, helping ensure lighting operates only when required.
Designed for a nominal 110–230 V AC supply, the Finder 11.31.8.230.0000 provides a single normally open 16 A contact. Its slim, single-module enclosure measures only 17.5 mm wide and mounts directly onto a 35 mm DIN rail inside a protected electrical panel.
Key Advantages
- Automatic lighting control according to ambient illumination.
- Adjustable 1–100 lx switching threshold.
- 110–230 V AC supply range for mains-powered installations.
- Single normally open contact rated at 16 A.
- Timed switching helps prevent nuisance operation caused by temporary light changes.
- Slim 17.5 mm DIN rail-mounted enclosure saves panel space.
Key Features
- Finder 11 Series modular light-dependent relay.
- 110–230 V AC nominal supply voltage.
- 1 normally open contact rated at 16 A and 250 V AC.
- Adjustable light threshold from 1 to 100 lx.
- 15 s switch-on delay.
- 30 s switch-off delay.
- Low standby power consumption.
- External photosensor connection with a maximum cable distance of 50 m.
- 35 mm DIN rail mounting for modular electrical panels.
Reliable Automatic Lighting Control
Light-dependent relays monitor ambient illumination through a remotely positioned photosensor and automatically control connected lighting when the measured level reaches a selected threshold. This provides lighting according to actual environmental conditions and can reduce unnecessary energy use compared with manually controlled installations.
The Finder 11.31 incorporates separate switch-on and switch-off delays to prevent brief changes in illumination from causing unwanted operation. This helps avoid switching triggered by vehicle headlights, lightning, temporary shadows or other short-duration changes in ambient light.
Typical Applications
- Street, pathway and access-road lighting.
- Commercial exterior and security lighting.
- Industrial yards, loading bays and storage areas.
- Car parks and perimeter lighting systems.
- Shop-window and illuminated-sign control.
- Garden and landscape lighting.
- Building automation and energy-saving lighting installations.
Technical Specifications
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| Device Type | Light-Dependent Relay | |
|---|---|---|
| Mounting Type | DIN rail | |
| Switching Current (A) | 16 A | |
| Contacts | 1NO | |
| IP Rating | IP20 | |
| Manufacturer | Finder | |
| Series | 11 Series | |
| Model | 11.31.8.230.0000 | |
| Product type | Modular light-dependent relay / twilight switch | |
| Nominal supply voltage | 110–230 V AC | |
| Supply frequency | 50 / 60 Hz | |
| Operating voltage range | 90–265 V AC | |
| Rated power consumption | 2.5 VA at 50 Hz | |
| Contact configuration | 1 normally open contact | |
| Rated contact current | 16 A | |
| Rated contact voltage | 250 V AC | |
| Maximum switching capacity | 4,000 VA AC1 | |
| AC15 switching capacity | 750 VA at 230 V AC | |
| Incandescent and halogen lamp load | 2,000 W at 230 V AC | |
| CFL and LED lamp load | 400 W at 230 V AC | |
| Sensitivity adjustment | 1–100 lx | |
| Switch-on delay | 15 s | |
| Switch-off delay | 30 s | |
| Maximum photosensor cable distance | 50 m | |
| Operating temperature | −20 to +50 °C | |
| Protection rating | IP20 | |
| Mounting type | 35 mm DIN rail | |
| Dimensions (H × W × D) | 88.8 × 17.5 × 60.8 mm | |
| Applicable standards | EN 60669-1 and EN 60669-2-1 |
Frequently Asked Questions
What is the Finder 11.31.8.230.0000 used for?
This light-dependent relay automatically switches connected lighting according to the ambient illumination measured by an external photosensor.
What supply voltage does this relay require?
The Finder 11.31.8.230.0000 has a nominal supply range of 110–230 V AC at 50 / 60 Hz.
What light threshold can be selected?
The switching threshold is adjustable between 1 and 100 lx, allowing the relay to be configured for different lighting conditions.
What is the output contact rating?
The relay provides one normally open contact rated at 16 A and 250 V AC, with a maximum AC1 switching capacity of 4,000 VA.
Where should the Finder 11.31 be installed?
The relay should be mounted on a 35 mm DIN rail inside a protected electrical panel, with the external photosensor positioned where it can accurately monitor ambient light without being affected by the controlled lamps.
Trusted Lighting Control from Finder
Finder 11 Series light-dependent relays provide dependable and energy-efficient lighting control through adjustable light sensing, delayed switching and compact modular construction.
