Brian H

The replace function would work if the replacement is a similar model. To do it you add the replacement with a new name. Then high lite the old one and pick the replace with function. Using the name you gave the new module. If it is a new power line only. It could take eight messages and acknowledgement to add one link to the replacement. So it would take awhile and if you have a power line noise issue. It may fail. If the new one is dual band replace may or my not be an option. As it may not be close enough for a swap.

Is it dual band or the power line only keypad?

I also don't think the 2477D or 2477S are not being gotten rid of. I also seen some of the ones that where not available. Being brought back along with the improved PLM. Both USB and Serial.

Do you have an eisy or polisy? That module is supported by their later firmware. If you are still using an ISY994i is it not supported by its latest firmware before being discontinued.

One other fact. There is going to be an eisy price increase in early May. https://www.universal-devices.com/price-increase/

Try power cycling one of the switches. You can pull out the Set button to turn off the switch power then push it in to its normal position. Do NOT go past the normal position or you may factory reset it. You may also go into the Administrative Console and see how many links are in it and the PLM. That may give you a clue. Restoring one of the problem switches and testing may also show something.

Latest for an ISY994i is 5.3.4. In the ISY994i area not any Polisy or eisy areas. I also feel do not try any updates until you get into the ISY994i. If everything us working OK I would also say do not do it. https://forum.universal-devices.com/topic/33287-534-isy994-last-release-for-isy994/ https://forum.universal-devices.com/topic/24381-iox-launcher/#comments

Then you have a chance to get a different module if you care to. I do know early ones had a history of failing and I don't know if they ever fixed it.

Turning on a high capacity relay does sound like a go way to go. Elk made a heavy duty 220VAC relay in an enclosure. With a 120VAC relay coil in an enclosure. Controlled by a On/Off module or any other similar module. Not sure if it would be anything you can use. https://www.elkproducts.com/product/heavy-duty-relay-contactor-9200/ Insteon sales site shows a 220VAC controller. https://www.insteon.com/load-controller

Sounds like a good point. Way back machine here. Early Developers days. We where able to get modules at the wholesale distributors price but had to promise not sell them.

Some versions may not have the Jumper Header. Just two solder pads where it was mounted on the PC board. In the early manuals. Was to set the reduction in sensing field. Jumper On is reduced sensitivity. The small jumper block was many times on one of the two pins on the PCB. Some have used the power connector in them to run them on an external USB power supply. They are supposed to not have to go into the power saving mode on an external supply.

That also crossed my mind.

Sorry to read of your experience. When you get a chance. Was it one of the old 2456S3 or presently sold 2635-222 on off module?

If it is like the one never seeing the light of day in the FCC Database. It would have a larger faster Link Database; faster processor clock, more universal power supply. Like 120 220VAC 50 60Hz.

Make sure the PLM is totally booted before you power up the eisy. If it is like the older ISY994i PLM detection is during its boot up.