JK (JiKong) RS485 interface wiring

[JanVJ]

My JK RS485 got chineese letters to identify colors for A and B.

Looks like JK made two different covers for the RS485 interface

I used Google Translate to identify the colors.

Since the result from Google is the same as the english version of the interface I will use this.

Hope this could be useful for others.

 

[JanVJ]

Saturday morning in rainy northern Europe;
I was going to do some testing;

On the table I got my 200 amp
JK (JiKong) B2A8S20P BMS

I was going to hook up my RS485 interface.

The interface comes with a 4 pin plug,
This BMS port labeled RS485 is a 3 pin port,

Next to the RS485 port there is a 4 pin port labeled GPS,

The datasheet give a lot of info;
Also the following text;

GPS (optional) Support (GPS or 485 just choose one)

Other interfaces (customized) RS485/CAN

I also got a interface that suppose to be a CAN interface. This interface also got a 4 pin plug.

My question; Would the 4 pin port labeled GPS also be the port for my 4 pin RS485 interface?

Why sell a bms with a 3 pin RS485 port, and interfaces with 4 pin plugs….. Just to confuse me 🤔

Anyone?

Yeah… maybe I need to ask the seller in China 🙄

 

[Nami]

 

[JanVJ]

Thank you for your help 👍

 

[TheSmartGerman]

View attachment 83482

@Nami
Do you have a manual / more informations about the connector. I do have the JK-B2A24S20P and try to get RS485 working.

Does the RS485 socekt provied native RS485 or do I always have to use the RS485 Adapter from JKBMS?

 

[upnorthandpersonal]

Does the RS485 socekt provied native RS485 or do I always have to use the RS485 Adapter from JKBMS?

It's just UART/TTL - so you don't need the adapter, just a TTL/USB adapter will do. Pinout is on my Github here in the readme:

GitHub - PurpleAlien/jk-bms_grafana: Read data from a JK/Heltec BMS and graph it in Grafana

Read data from a JK/Heltec BMS and graph it in Grafana - GitHub - PurpleAlien/jk-bms_grafana: Read data from a JK/Heltec BMS and graph it in Grafana

github.com