4.0 C-Bus
®
Light Level Sensor
The C-Bus
®
Light Level Sensor is a device used to measure ambient light, and transmit messages
over the C-Bus Network in response to changing levels. It is designed to operate within the range
of 40 to 1600 lux.
The sensor is capable of controlling the level of a group from 0 to 100%, or switching it on or off when
a light level threshold is crossed. The sensor can be enabled or disabled from a Group Address.
Figure 5 – Editing a PE Light Level Sensor unit
4.1 Groups
Three group control options are available for the C-Bus Light Level Sensor. (Figure 5) shows these
options which appear in the Groups section when editing the unit with the C-Bus Toolkit software.
The Indicator radio button lets you select which action controls the LED indicator on the sensor.
Available options are:
• Light Level — a group typically associated with a dimmer or analogue output module.
The level is ramped up when the ambient lighting level falls below the defined Target
Lux threshold.
• Light On/Off — a group typically associated with a relay output module. The group is
switched on when the ambient lighting level falls below the defined Target Lux threshold.
• Enable Group — a group typically associated with an input unit. When this option is used,
the PE Light Level Sensor will only issue C-Bus commands when the group is
switched on.
4.2 Ambient light
This is used when connected to a live Network. When the Refresh option is checked, the approximate
lighting level as read by the sensor is displayed.
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