DATA NAB MBus-WTH-LCD-ETH Wall Temp Humidity Sensor Owner’s Manual

DATA NAB MBus-WTH-LCD-ETH Wall Temp Humidity Sensor

Product Specifications:

• Model : MBus_WTH_LCD_ETH & MBus_WTH_LCD_ETH_EXT
• Application : Temperature and Humidity Monitoring
• Output Signals: 4-20mA, 0-5V, 0-10V
• Communication Ports:
  • MBus_WTH_LCD_ETH: RS485 Modbus-RTU, Ethernet Modbus TCP
  • MBus_WTH_LCD_ETH_EXT: RS485 Modbus-RTU
• Power Supply:
  • If not using analog output transducers: 12-24VAC/DC +/- 10%
  • If using analog output transducers: 15-24VAC/DC +/- 10%

Product Usage Instructions

Configuration:
The sensor can be configured using the buttons and LCD display.

Communication:
For MBus_WTH_LCD_ETH:

• RS485 communications port for Modbus-RTU at 19.2/9600 Baud
• Ethernet Port for Modbus TCP communication over IP

Modbus Register List:
Default RS485 Comm Parameters:

• Baud Rate: 115200, Data Bits: 8, Parity: None, Stop Bit: 1

The default Modbus-ID for Modbus-RTU over RS485 communication is set to 1. The default IP Address for Modbus-TCP over IP communication is192.168.0.3. Use Function Code 3 (Read Holding Registers) to read values and Function Code 6 (Write Single Register) to write values.

Analog Output:
Analog output jumper settings:

• 1=0-10V, 2=0-5V, 3=4-20mA (Read Only)

Room Temperature and Humidity Readings
Register Addresses:

• Room Temp Reading in DegF x10: Register 100
• Room Temp Reading in DegC x10: Register 101
• Humidity Reading in %RH x10: Register 304

The MBus_WTH_LCD_ETH and MBus_WTH_LCD_ETH_EXT Modbus-enabled temperature and humidity sensors are designed for environment monitoring in industrial, commercial, and residential temperature & humidity applications.

Features

• The sensor can be configured using buttons & LCD Display
• High-performance digital sensors and circuits to ensure accurate measurement and temperature compensation.
• Good long-term stability and reliability
• Fast response
• Multiple output signals selectable: 4-20mA, 0-5V or 0-10V
• RS845 communications port for Modbus-RTU, 19.2/9600 Baud
• Ethernet Port for Modbus TCP communication over IP

Relative Humidity

• Sensor : capacitance polymer
• Operating Temperature : 0~50°C
• Operating Humidity Range : 0~98% RH (Non condensing)
• Output : 4-20mA, 0-5V or 0-10V, RS485 Modbus-RTU
• Accuracy : 5% RH (25°C, 20~80% RH)
• Hysteresis : < ±1% RH
• Response time : < 10s (25°C, in slow air)
• Drift : < ±0.5% RH / year

Temperature

• Sensor : Internal 10K Thermistor
• Operating Temperature Range: -30~50°C (-22~122°F)
• Output : 4-20mA, 0-5V or 0-10V, RS 485
• Accuracy : < ±0.5°C @ 25°C

General

• Power Supply:
  • If NOT using 0-10V or 4-20mA output transducers: 12-24VAC/DC +/- 10%
  • If using 0-10V or 4-20mA output transducers: 15-24VAC/DC +/-10%
• Power Consumption:
  • 12VDC Power supply: assume 2 watts per sensor
  • 24VAC Power supply : assume 1VA per sensor
  • Current Output Load: < 500Ω
  • Display: LCD screen for wall / outdoor mount and duct mount
  • Display Resolution: 0.1°C, 0.1% RH
  • Operating Temperature : -30~50°C, 0~98% RH (Non condensing) The humidity sensor only accurate from 0~50°C.
  • Storage Temperature: -30~60°C
  • Plastic Housing: Flammability rating UL 94V0 file E194560
  • Protection: IP65

Enclosure views and Dimensions

Housing Dimensions (in mm) for both models. Probe Dimensions (in mm) for MBus_WTH_LCD_ETH

Probe Dimensions for MBus_WTH_LCD_ETH_EXT (mm)

Probe Dimensions for MBus_WTH_LCD_ETH_EXT (mm)

Inside view & details

Wiring Diagram

Modbus Register List

• Default RS485 Comm Parameters: 115200 baud, 8 data bits, no parity, 1 stop bit. (configurable under “misc” LCD menu)
• Default Modbus-ID for Modbus-RTU over RS485 communication is: 1. (configurable under “misc” LCD menu)
• Default IP Address for Modbus-TCP over IP communication is: 192.168.0.3 (configurable under “misc” LCD menu)
• Use Function Code 3 (Read Holding Registers) to read values and Function Code 6 (Write Single Register) to write values.

For more detailed modbus register information, please email support@datanab.com

FAQ

Q: How can I change the Modbus-ID for Modbus-RTU communication?
A: You can change the Modbus-ID under the LCD Miscellaneous menu.

Q: What is the default IP mode for Modbus-TCP communication?
A: The default IP mode is Static. You can change it to DHCP under the miscellaneous LCD menu.

References

• DataNab: Temperature & Humidity Sensors, Controllers & I/O, IP Audio – DataNab LLC

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