NGW100 RS485 modbus

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#1
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Hi,

I was wondering what would be the best way to go if I want to implement an rs485 (for modbus communication) on the ngw100.

Options are eg add a maxim 485 chip, buy a 232/485 converter..

Any hints would be appreciated.

Thanks,

Geert

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Total votes: 0

Most often you'll just stick a MAX485 equiv on the USART, hook the nRE/DE line to the RTS handshaking pin. Should work fine.

Word of warning, there are a heap of dodgy max485 clones around which have caused a huge amount of pain for myself. I would suggest either buying from someone you can really trust or using a more obscure part number that is less likely to have been counterfeit.

-S.