|
The C-Bus Light Level Sensor is a C-Bus input unit used to measure the ambient light level and issue ‘On’, ‘Off’ or ‘Ramp’ commands over the C-Bus network. Output units respond to the commands to switch or dim lighting loads.
The C-Bus Light Level Sensor can control up to two C-Bus ‘Group Addresses’. The first Group Address is used to control the switching ‘on’ or ‘off’ of a lamp circuit in response to the amount of ambient light, while the second Group Address is used to continuously control any number of lamps to regulate the light level output.
The C-Bus Light Level Sensor has a dynamic range between 40 and 1600 lux, although it is capable of measuring light level between 20 and 3000 lux. The Target Light Level and Margin are configured via the installation software. The margin represents the maximum allowed variation (dead band) of the light level value in respect to the pre-set target value. If the light level stays within the margin, the sensor will take no action.
The C-Bus Light Level Sensor unit incorporates filtering and some degree of hysteresis, to suppress noise and compensate for rapid light intensity fluctuations. If the natural ambient light level is sufficient an off command is transmitted across the C-Bus Network to the appropriately programmed output units.
The C-Bus Installation Software is used to configure the device. Communication with other C-Bus devices and the supply voltage is obtained via a single C-Bus twisted pair cable.
In the event of a power failure, an inbuilt non-volatile memory retains programmed information relating to the current operating status of the unit.
|
