bombproof RS485 chips?

[Dennis Clark]

Hi all,

I'm working a project where I've got several RS485 nodes cabled together
in about as hostile environment as I can imagine. High powered vacuum
pumps, high current stepper motors, high static discharge possibilities,
etc. Can anyone suggest an 8 pin part that is REALLY bombproof to static
and CMI? I know that the TI 75176B is right out, but who is in?

thanks,
DLC
--
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* Dennis Clark dlc@frii.com www.techtoystoday.com *
* "Programming and Customizing the OOPic Microcontroller" Mcgraw-Hill 2003 *
============================================================================

 

[Tomi Holger Engdahl]

Dennis Clark <dlc@io.frii.com> writes:

I'm working a project where I've got several RS485 nodes cabled together
in about as hostile environment as I can imagine. High powered vacuum
pumps, high current stepper motors, high static discharge possibilities,
etc. Can anyone suggest an 8 pin part that is REALLY bombproof to static
and CMI? I know that the TI 75176B is right out, but who is in?

Usually in the very hostile environments just selecting a right
RS485 IC is the usually the solution. TO be able to survive in
very hostile environment you usually need external protection
components that stop the spikes and surges so thay don't
get to the receiver IC. And then you don't that magic IC.

I work for a company that makes products that are used in
quite hostile environment (near high power high voltage
switcgear and power transformers). In those environments
no single receiver IC is anough, you need external
protection components.

For example Maxim seems to have quite a good selection of
RS485 receivers and protection components.

--
Tomi Engdahl (http://www.iki.fi/then/)
Take a look at my electronics web links and documents at
http://www.epanorama.net/