Tibbo BP#02 RS485 Modbus

Bus Probes are a family of environmental sensors with an RS485 interface. The probes communicate using the standard Modbus RTU protocol.

At the moment, Tibbo offers four types of probes: an ambient temperature sensor (BP#01), an ambient temperature and humidity sensor (BP#02), an ambient light sensor (BP#03), and a three-axis accelerometer (BP#04).

Bus Probes are typically wired to a twisted pair cable that distributes power and carries RS485 "+" and "-" lines. All probes accept a supply voltage from 4V to 15V, allowing you to power them with 5V sources (for example, the 5V output of Tibbit #00-3) or standard 12V power supplies. The wide supply voltage range also means that you can allow for a significant voltage drop along the bus (e.g., when using a bus cable of considerable length).

Bus Probes are very compact (measuring only 40x36mm externally) and sport an attractive look and feel. Each sensor has two mounting holes for attaching it to walls and other surfaces.

Bus Probes can be configured and tested using our web-based test app (you will need to connect the probes to your PC via our Web485 board). Tibbo also offers a browser-based test kit (see BP-TEST-WEB-KIT below), which consists of four Bus Probes (one of each type), a Web485 board, and the necessary cables.

Two Tibbo Project System (TPS), Gen. 2-compatible Tibbo BASIC applications for the setup and testing of Bus Probes are available: BP-Tester-UI and BP-Tester-Web. We also offer a TPS-based test kit (see BP-TEST-KIT below), which consists of four Bus Probes (one of each type), a TPS2L(G2) preloaded with the BP-Tester-UI app, and the necessary cables.

Specifications

Interface	Half-duplex (two-wire) RS485 interface
Communications parameters:	38400-8-N-1
Protocol	Modbus RTU
Power supply range	4~15VDC
BP#01 (ambient temperature sensor)	Measurement range: -40°C to 125°C1 Measurement resolution: 0.25°C Measurement accuracy: ±1°C2
BP#02 (ambient temperature and humidity sensor)	Temperature measurement: Measurement range: -25 to 50°C Measurement resolution: 0.5°C Measurement accuracy: not specified3 Humidity measurement: Measurement range: 10 to 90% RH Measurement resolution: 0.1% RH Measurement accuracy: ±5% RH4 Temperature range for valid humidity measurements: 5°C to 50°C
BP#03 (ambient light sensor)	Measurement range: 1 to 65528 lux Measurement resolution: 1 lux Measurement accuracy: 1 lux
BP#04 (Three-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
Operating temperature range	-40°C to +85°C
Operating relative humidity	10-90%
Mechanical dimensions (excluding terminal blocks)	40.0 x 36.0 x 19.0 mm

Here is How You Can Use Bus Probes

Use the probes in your Modbus system Tibbo Bus Probes feature an RS485 interface and support the industry-standard Modbus RTU protocol. Therefore, existing Modbus systems can use them as general-purpose environmental sensors. To aid in the creation of sophisticated Modbus systems and network-enablement of serial Modbus devices, Tibbo also offers Modbus Gateways.

Deploy the probes as a part of our TPS-based Remote I/O solution Our Remote I/O solution supports the use of Bus Probes. Connect the probes to the RS485 port on a standard TPS-based controller and collect environmental data via the RS485 bus. Combine TPS devices with Bus Probes to create environmental monitoring systems.

Key Features

Half-duplex RS485 interface

Modbus RTU protocol

4V to 15V power

Available Probes

BP#01: Ambient temperature sensor	BP#03: Ambient light sensor	BP#05: Flood/leak sensor
BP#02: Ambient temperature and humidity sensor	BP#04: Three-axis accelerometer	BP#06: Opto-isolated digital input (DI)