It seems to be.
Many of this users posts mention or link to this unit. Even the users avatar is a photo of the device
- first post: Recommendation for remote or wired digital I/O to combine with NR running on Raspberry Pi - #8 by magicfire
- next post (OPC UA server giving “TypeError: Cannot read properties of undefined (reading ‘indexOf’)” - #3 by magicfire) is thinly veiled help about OPCUA but links to a doc with the title "畅维通达PN6400网关 ---用Node-RED搭建一个OPC UA服务器+客户端" (ENGLISH: Changwei Tongda PN6400 Gateway --- build an OPC UA server + client with Node-RED)
- Third post is around developing a node specifically for this PN6400 device.
