The universal RS485 Modbus Sensor Datasheet specifications presented in this article are valid for all Andivi temperature, CO2, humidity, pressure, and VOC sensors.
Main Andivi Modbus Sensor Families presented below consist of several different variations of Modbus sensors and Modbus Weather Stations that vary in casing type, IP protection grade, etc.
Modbus Sensors Electrical connection
Type Modbus (Outdoor):
| Pin | Assignment |
| 1 | SHD |
| 2 | B |
| 3 | A |
| 4 | +Ub |
| 5 | GND |
Modbus Sensors Configuration of DIP-Switch #1
| Setting | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 |
| Baudrate | ||||||||
| 9600 | OFF | OFF | – | – | – | – | – | – |
| 19200 | OFF | ON | – | – | – | – | – | – |
| 38400 | ON | OFF | – | – | – | – | – | – |
| 57600 | ON | ON | – | – | – | – | – | – |
| Termination | ||||||||
| none | – | – | – | – | – | – | – | OFF |
| 120 Ω | – | – | – | – | – | – | – | ON |
| Parity | ||||||||
| Even Parity | OFF | OFF | ||||||
| Odd Parity | OFF | ON | ||||||
| No Parity | ON | OFF | ||||||
| No Parity | ON | ON | ||||||
| Modbus | ||||||||
| RTU | OFF | |||||||
| ASCII | ON | |||||||
| Stop bits | ||||||||
| 1 | OFF | |||||||
| 2 | ON |
Modbus Sensors Addressing of DIP-Switch #2
How to read the below settings of the DIP Switch #2?
⬛ = ON = Switch is up
⬜ = OFF = Switch is down
Register Address of sensors
| Measurands | Modbus register | Gain |
| CO2 (Carbon Dioxide) | ||
| ppm | 10 | – |
| Temperatur / Humidity | ||
| °C | 20 | 10 |
| % relative humidity | 21 | 10 |
| kg/m³ | 22 | 10 |
| dewpoint °C | 23 | 10 |
| enthalpy J | 24 | 10 |
| VOC (Air Quality) | ||
| ppm | 30 | – |
| Differential Pressure | ||
| mbar | 40 | – |
| mbar | 41 | – |
| Temperature | ||
| °C | 50 | 10 |
| Brightness | ||
| lux | 60-61 | – |
Do you need Modbus RS485 Sensor Datasheet in PDF?
Download the Modbus RS485 Sensor Datasheet for temperature, CO2, humidity, VOC and pressure sensors in PDF here.
Questions?
Should you have any questions regarding Modbus Sensor configuration, Modbus Related Questions on Product questions feel free to contact our support team at support@andivi.com.
For questions regarding the installation of sensors make sure to read: Mounting guidelines for sensors & general sensor installation recommendations.
Here, you can learn more about Which Type Of Modbus CO2 Sensors Are Most Common.
What is RS485?
RS485 or EIA (Electronic Industries Association) RS485 is a balanced line, half-duplex transmission system allowing transmission distances of up to 1.2 km.
The table below summarises the RS-485 Standard:
| Mode of Operation: | Differential |
| Nr. of Drivers and Receivers: | 32 Drivers and 32 Receivers |
| Maximum cable length: | 1200 meters |
| Maximum data rate: | 10 M baud |
| Maximum common mode voltage: | 12 to -7 Volts |
| Minimum Driver Output Levels (Loaded): | +/- 1.5 |
| Minimum Driver Output Levels (Unloaded): | +/- 6 |
| Drive Load (Ohms): | 60 (min) |
| Driver Output short circuit current Limit (mA): | 150 to Gnd, 250 to -7 or 12 V |
| Minimum receiver input Resistance 12 (kohms): | 12 |
| Receiver sensitivity: | +/- 200mv |
