Isolated 485 - replacement needed

[joebazoka]

Isolated 485

Hi to all. Actually I have develop a system with a RS485 interface. I`m using a MAX1480 device, it have an excellent performance but is very expensive. Anybpdy know a replacement for this device?. I need an isolated device. Thanks and regards.

 

[aNdreiBuuu]

...

U can use a non-isolated 485 transceiver and 3 optocoupler (1-rx, 2-tx, 3-Sense)... and a floating powr source for transceiver...
If i have time I'll draw tomorrow a schematic for this...
best,
//a

 

[servopump]

Hi joebazoka,

Here is an user manual with schematic for an opto isolated rs232 to rs485
convetter.

ServoPump

 

[joebazoka]

Isolated 485

Great info!!!. Thanks to all for the help.

 

[ZeRoN]

I've this circuit, may be useful.

 

[cube007]

Hello,

you can use a device from NVE. The IsoLoop isolators are very fast and easy to use but you will need an extra DC/DC converter.

https://www.nve.com/products/isolators/isproducts.html

By,
cube007

 

[petarpav]

Thanks for schmatic.
Very usefull.

 

[aNdreiBuuu]

...

ZeRoN schematic is OK!
//a