Schneider Electric CCT15285 Acti9 IC2000 Indoor Twilight Switch

CCT15285 Acti9 IC2000 indoor twilight switch, 2 to 2000 lux

The CCT15285 is a one-channel twilight switch in the Schneider Electric Acti9 IC2000 family, supplied with an indoor twilight sensor. The module is 18 mm wide on TH35 DIN rail, has a normally-open contact and an adjustable brightness threshold of 2–2000 lux. Seven Star LLC supplies the CCT15285 in Oman and the GCC as an independent supplier based in Muscat.

Choose the CCT15285 where the brightness to be measured is inside a building or behind glass: atrium lighting, corridors that borrow daylight, shop interiors. The outdoor sibling CCT15369 uses a sensor with a weatherproof housing instead.

How the CCT15285 switches

Control is by brightness detection with a time delay of 20 s on and 80 s off, so brief changes such as a passing cloud or a headlight do not toggle the output. The dry contact is 1 NO, rated 10 A – 250 V AC pf = 0.6 and 16 A – 250 V AC pf = 1, with a minimum of 10 mA 230 V AC and 100 mA 24 V AC/DC. Standby power is 0.5 W stand by.

The datasheet gives the sensor protection as IP66 (sensor)front and IP40 (sensor)rear for the front and rear, while the module is IP20. The sensor is for indoor use as the title says; it is the module that goes in the board.

CCT15285 technical specifications

Setting the threshold on the CCT15285

The threshold is a dial between 2 and 2000 lux. Set it at dusk with the real lamps off: turn the dial until the output just switches at the brightness at which you want the lights on, then confirm the time delay stops flicker. Always keep the sensor out of the light of the lamps it controls.

The delay of tens of seconds is a feature, not a fault: after the dial setting the output will change a short moment later.

CCT15285 against the other twilight products in this range

Datasheet comparison of the twilight modules and the separate cell:

Loads and ratings for the CCT15285

Lamp-load limits from the datasheet:

• incandescent lamp: 2600 W
• halogen lamp: 2600 W
• non-corrected fluorescent tube: 2300 VA
• serial-compensated fluorescent tube: 2300 VA
• parallel compensated fluorescent lamp: 730 VA (80 µF)
• compact fluorescent lamp: 170 W
• < 2 W LED lamp: 30 W
• ≥ 2 W LED lamp: 200 W

For heavier or inductive loads, drive a contactor and let the twilight module switch only its coil.

Selection checklist for the CCT15285

• Where is the light measured: indoors, outdoors, or at a remote wall position?
• Is brightness alone enough, or is a time schedule also needed?
• Does the supply and load match the module rating on the datasheet?
• Is the cable length enough between sensor and module?
• Does the mounting position avoid direct light from the controlled lamps?

Reading the lux scale: a low threshold makes the output respond only in near darkness, while a setting toward the 2000 lux end responds in bright daylight. Pick the threshold from the brightness at which lights are really needed on site, not from the datasheet range alone.

Installation and commissioning of the CCT15285

Install this unit according to its role: clip the module onto the rail, place the indoor sensor where it sees representative daylight and wire its two sensor terminals.

Test on site at dusk, check that the output is stable through the delay, and record the final dial position in the board schedule so that a replacement can be set the same way.

If the lights flicker around dusk, the usual causes are a sensor that sees its own lamp, a threshold set too close to the switching brightness or a contaminated sensor window. Move or shield the sensor first, then adjust the dial, and only then look at the module.

Where the CCT15285 fits in Oman and the GCC

Twilight control suits external lighting for compounds, roads, car parks and facades, and daylight-linked lighting in atria and corridors. Strong sun, dust and sand on a sensor window and high board temperatures are the main local issues: place sensors where they can be cleaned, shade boards and compare the datasheet limits with real conditions.

Lighting circuits in the region often share one supply with signage and security equipment, so record in the board which outputs follow the twilight signal and which do not. A written setting for the dial, the lux threshold chosen and the date of commissioning saves time at the next maintenance visit.

Documents and quotation

The official Schneider Electric datasheet of this unit is attached on this page for download, so every figure above can be checked against the source.

To request a quotation, send us the part number CCT15285, the quantity and the delivery location through the RFQ form. Seven Star LLC replies with availability and lead time.