RS232 Mux on PLC 5/ SERIAL PORT

CaspianSage · Sep 12, 2018

Have any of you used an RS232 mux on a plc 5 serial port so more then one device can communicate with it with DF1 protocol?

Any idea if it will work decent enough for non critical application?

Thank you.

CaspianSage · Sep 12, 2018

... I don't think this could work... There would have to be a driver in the plc to talk to the MUX. -- I was thinking backwards...

CaspianSage said:
Have any of you used an RS232 mux on a plc 5 serial port so more then one device can communicate with it with DF1 protocol?

Any idea if it will work decent enough for non critical application?

Thank you.

Mickey · Sep 12, 2018

Allen Bradley used to make one (1747-DPS1 Port Splitter). Not sure if they still do.

See link...

https://www.google.com/search?q=174...S1&aqs=chrome..69i57&sourceid=chrome&ie=UTF-8

Or Prosoft..

http://www.prosoft-technology.com/P...Master-Slave/DF1-Serial-Port-Expander-Gateway

Onstege · Sep 16, 2018

In my previous life as an A/V integrator I managed to pull of a similar trick with four relays for selecting which device to talk to. Still running like a clockwork, just make sure you have gold plated relays to handle the small currents.

tarik1978 · Sep 16, 2018

DF1 Serial Port Expander Gateway 5102-DFS3-DFM
The ProLinx DF1 Serial Port Expander Gateway allows you to attach up to three separate DF1 master devices to a single DF1 slave.
http://www.prosoft-technology.com/P...Master-Slave/DF1-Serial-Port-Expander-Gateway

RS232 Mux on PLC 5/ SERIAL PORT

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