The UNI3 extension allows Perseus to:
- detect compatible RTU sensors the RS-485 bus
- identify available sensor variables
- automatically add sensors the system
- automatically configure detected variables
- remotely update sensor firmware.
For UNI3 communication:
- Modbus/RTU address 240 reserved the RS-485 bus
- supported baud rates are 4800, 9600, and 19200 Bd
- standard Modbus RTU device with address 240 may present the bus
UNI3-compatible sensors can also operate standard Modbus RTU devices without
automatic detection.HW-group.
Each UNI3-compatible sensor has:
- standard Modbus RTU address (primary address)
- factory-assigned secondary address (serial number)
During automatic detection, Perseus communicates with sensors using the secondary
address via the HWg UNI3 protocol extension.
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Power-Up
Power the sensor connecting power supply the VCC and GND terminals.
After power-up, the sensor briefly displays the configured baud rate and RS-485
address, and then switches displaying the measured temperature and humidity
values.
Automatic Detection RTU Sensors Perseus
HWg Perseus devices support automatic detection group Modbus RTU sensors
equipped with the UNI3 extension
