TIBBO BP#03

Datasheets: No.

BP#03: Ambient Light Sensor

Brands: Tibbo

Feature: ModbusSerial

Bus Probes are a family of environment sensors with an RS485 interface. The Probes communicate using standard Modbus RTU protocol. At the moment, Tibbo offers four types of probes: ambient temperature sensor (BP#01), ambient temperature and humidity sensor (BP#02), ambient light sensor (BP#03), and 3-axis accelerometer (BP#04).

Bus Probes are typically wired to a twisted pair cable, which distributes power and carries RS485 "+" and "-" lines. All probes accept the supply voltage in the 4V to 15V range. This allows you to power them from 5V sources (for example, the 5V output of the Tibbit #00-3), as well as standard 12V power supplies. Wide supply voltage range also means that you can allow for a significant voltage drop along the bus, i.e., use a bus cable of considerable length.

BP sensors are very compact (external dimensions only 40 x 36mm) and sport an attractive look and feel. Each sensor has two mounting holes for attaching it to walls and other surfaces.

Tibbo supplies two TPS2(G2)-compatible Tibbo BASIC applications for convenient setup and testing of Bus Probes (see BP-Tester-UI and BP-Tester-Web).

Hardware

Specifications:

Half-duplex (two-wire) RS485 interface.
Communications parameters: 38400-8-N-1.
Modbus RTU protocol.

BP#01 (ambient temperature sensor):
Measurement range: -40 to +125°C*;
Measurement resolution: 0.25°C;
Measurement accuracy: ±1°C.

BP#02 (ambient temperature and humidity sensor):
Temperature measurement:
Measurement range: -25 to +50°C;
Measurement resolution: 0.5°C;
Measurement accuracy: not specified.
Humidity measurement:
Measurement range: 10 to 90%RH;
Measurement resolution: ±0.1%RH;
Measurement accuracy: ±5%RH;
Temp. range for valid humidity measurements: +5 to +50°C.

BP#03 (ambient light sensor):
Measurement range: 1 to 65528 lux;
Measurement resolution: 1 lux;
Measurement accuracy: 1 lux.

BP#04 (3-axis accelerometer):
Independent X, Y, and Z axes;
Measurement range for each axis: ±6G;
Measurement resolution for each axis: 0.003G;
Measurement accuracy for each axis: 0.1G.

Green and red status LEDs.
Power: 4 ~ 15VDC.
Dimensions excluding connectors (LxWxH): 40 x 36 x 19mm.
Operating temperature range: -40 ~ +85C.
Internal firmware is upgradeable through the RS485 port.

* The actual measurement range is limited by the operating temperature range of the Bus Probe itself, which is (-40 to +85°C).