WL-BASE

The wireless Ouman sensor system enables a quick and easy reading of precise room temperature data in a building without the laborious laying of cables and drilling of walls. Base station (WL-BASE) calculates automatically average room temperature based on values which are collected from selected sensors. The calculated value can be used when controlling of heating. The base station can be connected as Modbus slave to different SCADA systems or as Modbus master to OUMAN unit controllers S203, C203, H23 or EH-203. MODBUS slave register can be obtained from base station user interface.

The sensor system comprises a base station (WL-BASE), sensors that act as routers and are connected to the mains, and battery-operated wireless sensors (WL-TEMP-RH). In the event of failure, a damaged sensor can be replaced without changing the register list. This makes the installation of the replacement sensor quicker and easier.

The mesh structure of the wireless network improves network reliability. The signal has multiple routes, from which the system automatically selects the strongest. The larger the number of routers in the coverage area, the more routing options the signal has. One wireless base station can monitor data from up to 100 sensors.

Base station connections:
• Direct connection to base station with browser. (over the Internet/locally)
• Ounet connection directly from the base station. (over the Internet)
• local Modbus RTU connection.
(Connections can be utilised simultaneously)
Encryption:
All wireless communication is encrypted. Encryption and authentication uses AES CCM + 128 bit key

Technical data:
• Case: ABS plastic
• Operating temperature: 0°C...+50°C
• Protection class: IP20
• Measurement interval in installation mode: 10 seconds
• Measurement interval in normal mode: can be adjusted (1–240 min)
• Dimensions: 90 x 70 x 59 mm
• Installation: Mounted to DIN bar
• Operating voltage: 24 VAC / 5.5 VA or 20...30 VDC / 3W (If the voltage is 10-20 VDC, then the AO output does not work properly.)
• Power consumption in use: 12 VDC 160mA, 24VDC 85mA, 24 VAC 210mA
• Network size: up to 100 sensors
• Data transfer connections: RS-485 bus (A and B): Unisolated, supported protocols Modbus-RTU