ST8500+STLD1 DC Carrier

[闰土_it]

Hello! I currently have several questions regarding STM8500 + STLD1 DC carrier communication. Please reply!

 

1: I send differential signals via STLD1, which are capacitively coupled at high voltage between DC48V and DC48V_GND, then received at the receiving end. Shouldn't be any issues, right? The theoretical transmission distance can reach 3km, right? Is there a more complete reference schematic design available? The schematic provided in the official manual is incomplete.

 

2: The STM32F401 communicates with the ST8500 via UART. Can I use the ST8500 simply by calling AT commands or API interfaces? Or do I need to program the ST8500 itself or download firmware to use it?

 

*This post has been translated from Chinese to comply with the ST Community guidelines.

[Didier HERROUIN]

Hello,

The ST8500 works over a DC bus, but the max distance for communication also depends on external factors like the noise on the bus, the equivalent bus impedance, number of nodes, etc…

Communication with ST8500 is only possible using UART commands as described in the user manual.
he FW must be loaded at each power-on as ST8500 only embeds RAM memory.