I/O SMS Triggering

[Duncan_Ketcheson]

Good afternoon!

I never heard back regarding this, but I was able to get the relay output on an external IO module working (I can hear it click when it comes on and the indicator light on the card comes on as well), but I still am unable to get the onboard DO working in the same way.

Would you be able to help with troubleshooting why this isn’t working? Is the onboard DO different from the external IO module’s DO? The only thing that I changed was going from DO1 to DO2, which works perfectly on the IO module.

Thanks!

Duncan Ketcheson

Industrial Solutions Inc.

[deryck_hms]

Hi Duncan,

Sorry for the delay it looks like your other email was not filtered into the correct queue.

The DO built into the ewon base unit is different then the R1 and R2 on the FLX3402. The extension card uses relays for the output while the DO on the base unit is a MOSFET.

This will require a little more to use and has a limited voltage and current rating. This topic covers the wiring of the output.

Cosy digital output

@Bill_Davies The ewon uses an N-channel MOSFET with the drain is syncing power and would be the negative side of your circuit. If this is done in reverse you could see the light work the opposite from what you expect since you would be pulling power thought he MOSFET. I found this web page which provides a good explanation on how the MOSFET is being used in the Flexy. The first example shows a diagram that should be similar to how the MOSFET is being connected internally to the flexy. In the…

Deryck

[system]

Topic closed due to inactivity.