every CT clamp input channel will have two resistance. for example, CT2 channel are R23, R24
   
use the formula let input voltage <700mV

if your CT clamp sensor is 2000:1
Load current=30A,
input voltage = 5.1R*2*30A/2000=153mA (VIPN)

so if input voltage <700mA , use 5.1R resistance on PCB, 2000:1 MAX can detect 137A AC220V load.

if you want support more large current, you can change the  resistance or change CT 2000:1 with other models. Just use by the  formula.

   
every CT clamp input channel will have two resistance. for example, CT2 channel are R23, R24
   
use the formula let input voltage <700mV

if your CT clamp sensor is 2000:1
Load current=30A,
input voltage = 5.1R*2*30A/2000=153mA (VIPN)

so if input voltage <700mA , use 5.1R resistance on PCB, 2000:1 MAX can detect 137A AC220V load.

if you want support more large current, you can change the  resistance or change CT 2000:1 with other models. Just use by the  formula.

   
every CT clamp input channel will have two resistance. for example, CT2 channel are R23, R24
   
use the formula let input voltage <700mV

if your CT clamp sensor is 2000:1
Load current=30A,
input voltage = 5.1R*2*30A/2000=153mA (VIPN)

so if input voltage <700mA , use 5.1R resistance on PCB, 2000:1 MAX can detect 137A AC220V load.

if you want support more large current, you can change the  resistance or change CT 2000:1 with other models. Just use by the  formula.

Hello,
I am trying to connect a pressure sensor to my KC868-A16 board using RS485 communication. The sensor works via Modbus RTU, and I want the KC868-A16 to act as the master.
Here are the issues I am facing:

1. On the web configuration page of KC868, I can see General Protocol and Custom Protocol, but I am not sure which one I should use for the pressure sensor, since it is not listed in the default devices.
   
2. I have tested the RS485 line with a USB-RS485 adapter and Modbus Poll, and I can see the sensor replying with values (e.g. 500, 0, 500, …). So the sensor is working correctly.
   
3. When I try to scan for slave IDs from Python via the KC RS485, I only get timeout errors. TX is active, but RX never receives data.
   
4. I have already checked the wiring (A↔A, B↔B, and GND connected), baudrate, parity, stopbits, and slave ID, but still no communication between KC and the pressure sensor.
   

• How should I configure KC868 in the web interface to read registers from the pressure sensor?
  
• Do I need to use General Protocol or Custom Protocol?
  
• Is there any example of how to set the registers mapping for an external Modbus RTU sensor?
  

Greetings,
We recently bought a kincony M30 unit and would like to measure industrial power three phase consumptions. We have 4 breakers rated 630A, 630A, 340A and 320A. Is it possible to use 2000/1 current transformers for this measurement? if not, can we use a higher transformation ratio like 3000/1, 4000/1 or 5000/1 and adjust in software to keep the secondary current low?

I've read in others threads that 2000/1 CTs are okay but that the M30 limit is 50ma of secondary current or 1V.

Any workaround to make this measurement possible?

Thanks!

Hello,

While T16M board doesn't explicitly have I2C and UART connectors as per the product description,  I was wondering if using GPIOs can be a way to have I2C and UART interfaces.
The documentation says GPIO ports exposed on screw terminals (GPIO8, GPIO9, GPIO10, GPIO15, GPIO16, GPIO17, GPIO18) have pull-up resistors and can be used for 1wire sensors.

My questions are:
1. What is the pull-up resistor value? 4.7k?
2. Is there ESD protection diode for these pins?
3. Can these GPIOs be used for I2C and UART? (typically: GPIO8 and GPIO9 for I2C, GPIO16 and GPIO17 for UART)

how is the time set in the ds3231 module?

When D1 input is pulled low, the input symbol i the web interface turns green, but the D1 output does not respond. The input push-switches does not do anything. In IFTTT i have: IF DI1  single click, THEN DO 1 ON. When i click RUN, it works fine, but not when i pull DI1 input low og push the DI1 switch. I run firmware version KCS_KC868_E16P_V2.2.14

Attached Files

Thumbnail(s)
           

F24 buttons on PCB:
  RST: RESET of ESP32
  DL: ESP32 download button
  CFG: tuya config

Can the DI8 i2c io expander be used with F16?