LDF+
The brightness sensor for ceiling installations detects indoor and outdoor light levels in living rooms, offices or at workplaces depending on the type of prism. The sensor is adapted to the spectral sensitivity of the human eye and serves together with control systems for an on-demand light or sun protection control. The remote sensor is connected to the enclosure via conventional RJ45 cables, making it easy to install in hardly accessible places. If two sensors are used, the individual values, the mean, minimum or maximum value can be provided through both output signals (configurable via Thermokon USEapp).
| Measuring values | luminosity |
|---|---|
| Output voltage | 1x/2x 0..10 V or 0..5 V (adjustable via jumper; live-zero configuration via Thermokon USEapp), min. load 10 kΩ |
| Output ampere | 1x/2x 4..20 mA, max. load 500 Ω |
| Output switch contact | Relay: 2x floating contact NO for 24 V ~ or 24 V = / 3 A, optional |
| Network technology | RS485 BACnet (MS/TP), LON FT (free topology), RS485 Modbus |
| Power supply | 15..35 V = or 19..29 V ~ SELV, A: 15..35 V = SELV |
| Power consumption | typ. 0,6 W (24 V =) | 1,5 VA (24 V ~), A: max. 20 mA (24 V =), AA: max. 40 mA (24 V =) |
| Measuring range light | 0..200 Lux | 0..1000 Lux | 0..2 kLux | 0..10 kLux | 0..20 kLux | 0..50 kLux, selectable at the device |
| Accuracy Light | ±5% of measuring range, calibration via Thermokon USEapp |
| Sensor | Ambient light sensor with precise optical filtering appropriate to the human eye |
| Prism | acrylic glass clear, straight, diagonal |
| Enclosure | enclosure USE-M, PC, pure white |
| Protection | IP30 according to EN 60529 |
| Cable entry | Flextherm M20 for wire Ø=4,5..9 mm, Relay/BUS: M25 with fourfold cable entry for wire with max. Ø=7 mm, removable |
| Connection electrical | removable plug-in terminal, max. 2,5 mm², BUS terminal: removable plug-in terminal, max. 1,5 mm², sensor wire (patch cable) length=1,5 m (default), max. 10 m, plug RJ45 |
| Ambient condition | -25..+65 °C, max. 85% rH non-condensing |
| Delivery contents | incl. mounting base enclosure USE-M pure white |