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Forum Index : Microcontroller and PC projects : TTL to 422 Waveshare
| Author | Message | ||||
| PhenixRising Guru  Joined: 07/11/2023 Location: United KingdomPosts: 857 |
Quite like the look (and price) of this Obviously auto-enabling and I like the isolation and selectable terminating resistor. Waveshare has an interesting store on AE.  |
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| Volhout Guru Joined: 05/03/2018 Location: NetherlandsPosts: 4222 |
Looks nice, but... 1/ It can be powered by 3.3V. I wonder how good that is for an isolated switcher. 2/ some of the datasheet is incorrect. This can not be done with RS422, or they violate the output specification, in which case I would not use the device. Outputs cannot parallel. In RS485 you can since they are disabled when not driven, but RS422 is always ON.  Volhout Edited 2024-09-27 03:52 by Volhout PicomiteVGA PETSCII ROBOTS |
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| PhenixRising Guru Joined: 07/11/2023 Location: United KingdomPosts: 857 |
That's my point Harm. Lots of newer devices sense the data and auto-enable/disable. Even their 485 devices only require RX, TX, GND on the TTL side. |
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