SN65HVD75: RS485 Power Over Bus

Jason Change

Intellectual 370 points

Part Number: SN65HVD75

Hi,

May i use SN65HVD75 to implement power over bus?

over 5 years ago

0 Hao L over 5 years ago

TI__Mastermind 25705 points

Jason,

Are you referring to this TI design? Yes, SN65HVD75 could be used instead, though the data rate is a little bit lower. To transmission data over power line, you need to separate the data (high frequency signal) from the power (low frequency signal) by C and L. Therefore you may want to adjust the C/L values accordingly. Please let me know if it makes sense to you.

Regards,

Hao

0 Jason Change over 5 years ago in reply to Hao L

Intellectual 370 points

Hi Hao,

Yes we referring TI design.

We saw this schematic RE and DE was separated.

May i combine two pin together for control?

0 Hao L over 5 years ago in reply to Jason Change

TI__Mastermind 25705 points

Jason,

It should be OK to connect DE and REB controls. By doing this, only TX or RX is active. Please let me know if you have more questions during the implementation.

Regards,
Hao

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SN65HVD75: RS485 Power Over Bus