Logo Sentera
Sentera – your partner in HVAC control solutions
Search
Allow us to inform you
Leave us your contact data so that we can communicate with you.

Close

What is the maximum cable length for a Modbus RTU network?

Modbus RTU – how to interconnect Sentera devices
We recommend that the total cable length per segment does not exceed 1.000 m. (Total cable length = sum of the main network line and all branches).

Modbus RTU should follow a line topology, so avoid making branches on the main line. If branches are present, they should be kept as short as possible. The combined length of all branches should not exceed 20 m.

When the total cable length becomes too high, the Modbus RTU communication will be disturbed. To compensate these communication losses due to cable length, a Modbus repeater (e.g. DPOM-24-20) can be used to compensate cable length.
Recent news
Date 16/03/2021
CO2 monitoring system to reduce the risk of COVID-19 contamination
CO2 monitoring system to reduce the risk of COVID-19 contamination Fresh indoor air reduces the risk of COVID-19 contaminations. Sentera HVAC sensors check whether there is sufficient fresh air supply. The measurements can be visualised via a 5-inch touchscreen. >>>
Date 01/02/2021
CO2 sensors with visual and audible alert
CO2 sensors with visual and audible alert Too high CO2 concentrations? Sentera CO2 sensors are now available with audible alert. On top of that, the green, yellow and red LED offer a clear, visual indication of the CO2 level. The supply voltage is 230 V or 24 V. >>>
Date 30/10/2020
Ventilation systems in Covid-19 times
Ventilation systems in Covid-19 times Ventilation systems in Covid-19 times >>>