Brian H

Do you have a PRO version of the ISY994i? What revision firmware and does the UI match that version?

If the UPS and computing gear is on a FilterLinc. They probably are not effecting things. Only other thing I can think of. An electronic device is starting to make electrical noise. Disconnecting things ad testing may show something.

If you measured the power supply and there was no load on it. Like the ISY994i or test load resistor. You will get a false reading. The power supply probably can no longer supply any current if loaded. The dim and flickering power LED is also another indication the power supply is bad and can't supply the proper voltage and current needed to run the ISY994i. I would test the ISY994i with a new power supply before doing anything more. The ISY994i can take a wide voltage range input. 5VDC to 30VDC .500mA or higher current rating, + voltage on center pin. You can try another supply until your new one arrives or wait. The last time I looked. UDI was selling a 12VDC 1Amp replacement on their web store. When you power up the ISY994i with the new supply. Power up the PLM so it is totally booted up. Then power up the ISY994i. So the PLM is found when the ISY994i boots up and you don't get a safe mode start up.

That sounds like a very good choice. It is made for controlling 240VAC heating units and has 24VAC control built in.

ELK makes an ELK9200 240VAC control in an electrical box. Has a 120VAC power cord on it and you can control it with a On/Off module. A 120VAC contractor and Insteon relay type switch or plug in module as pointed out. Could be another good way to go.

You may want to look at page #5 and #7 of this thread. For internal photos of a V1.0 2413S The V1.0 2413S has rework in the power supply. The C7, C13 and a coil are hanging off the board . Along with a fly wire going to the solder side of the main board. To me it looked like originally only had one capacitor and no small coil in it. For filtering. I would use a quality capacitor (Low ESR and rated for a switching power supply) in it. I would say stick with the 10uF 35V or 50V for C7 and C13 due to the way they are sticking over the main board (see the pictures on the noted pages). The rest of the list should be OK. I am just not too sure about the size of the 100uF 35V or 50V physically fitting.

V2.5 has the improved series capacitors and new serial port daughter board. By chance. Is the PLM on the same branch circuit. As some computing equipment or AC input side of an UPS?

This also applies to the presently sold ISY994i https://wiki.universal-devices.com/index.php?title=ISY-99i/ISY-26_INSTEON:Red_Exclamation_Mark

As pointed out. The WIKI has all kinds of information in it. https://wiki.universal-devices.com/index.php?title=Main_Page

If your last PLM was a Version 2.5 (The latest reported) or 2.4. They have new capacitors rated to be in a switching power supply and new Daughter Board with ESD protection for the I/O signals and serial chip. V2.3 the new capacitors and older daughter board. It sounds like you could have some noise or signal sucking on the power lines at times. Anything new electronically in the house or maybe moved an existing device to a new location?

I too would recommend all your Insteon linking and scene setup be done through the ISY994i interface with its 2413S PLM. If you want some information on how Insteon works. The Insteon White paper is still available. http://www.insteon.it/documentation/insteon_details.pdf Developers Guide. http://cache.insteon.com/developer/developer-guide-022009-en.pdf PLM. http://cache.insteon.com/pdf/INSTEON_Modem_Developer's_Guide_20071012a.pdf Some of the information in the files maybe dated. Like X10 support. Many of the latest revision modules removed X10 support. The X10 two wire dimmers stole power through the load. Except for the Insteon two wire dimmer for incandescent bulbs only. The wall switches need a Neutral power connection. So you may want to see if you have a Neutral in the locations where you want an Insteon Switch.

I do remember seeing a few Bridge devices in the FCC Database but can't find them in my archives at the moment. I think I downloaded the files. I did find added to the FCC Database date of 10/29/2019 for the 2234-222 and 2234-223 modules. As SBP22342

I doubt it is for Europe only. Why would they look for FCC approval if not being sold in the USA? When the European Standards authorities would be the ones needing approval.

There is a new 2234-222 USB and 2234-223 Serial PLM replacement in the FCC Database. Expanded Link Database from ~1000 to ~4000. Universal power supply 100 to 240VAC 50/60Hz. RAM is faster speed for faster access. FCC photos show what looks like an AC input plug as a separate assembly. Mounted to the back of the main case. My thoughts future models maybe available for other country's standards. So the ISY994i should be fine.

If you want to use the Motion Sensor II or Siren Modules to name two. Not supported in the 4.x firmware.

I think they got hit with Covid19 issues. Like many other manufacturers did. I suspect new modules in the works. Got delayed and the older modules sold out. Before the new models got into the production and sales stream. Though it sounds like Richmond Capital Partners was going in a new direction and how Insteon fits the new direction. Who knows?

No it is made to go between the two incoming power lines. Usually around 220VAC. To couple the power line signal from one line to the other line. It does not pass the AC voltage between the two lines or from one of its leads to the other lead. It is a passive device and the ISY994i will not see it.

Diode is also on the ELK 912. I had thought they where going to try a plain 12VDC relay not an assembled board with protection.

If you go for a 12 volt relay it would be wise. To have a reverse polarity diode across the relays coil. To suppress the voltage spike when the relay is turned off. The ELK-912 has the diode on it as part of the assembly.

The LED may have a resistor in series with it to limit the current through the LED to a safe level. How it is connected and where you try a relay may be determined by which side of the resistor you use or if it will not effect how bright the LED flashes. I would also not use a relay that had too high a coil current needed to operate it. Maybe a small electronic assembly. That drives a relay and triggered by a application of a voltage to its control input.

7-zip worked on mine. PKUNZIP only showed nothing in the in the backup zip file. That did have a file size. When you unzip it. You will find it has another zip file in it. Unzipping the second file. It will have data in a CONF sub folder.

Sounds encouraging. Let us know the results after a test period.

The Sensor and Magnet both have an arrow on them. For correct orientation . From your photo. I see the set button through the top cover. So you don't have to take it off to push it. That is the later 2843-222. The my ISY994i calls it a 2441. When I added one for a test.

It is a sealed magnetic reed relay as mentioned earlier. Are the brackets metal? Steel or any other metal a magnet attracts? The Magnet and Sensor look like they are mounted on metal brackets. That can effect how things work and the RF transmission distance to an Insteon RF receiver. The LED on the sensor. Should flash each time the magnet turns the sensor on or off. As a test. You can connect a switch to the external switch input of the sensor. Leaving the magnet away from the sensor. Then open and close the external test switch and see if it sends more reliably.

I did read your posts. Sorry my post was not clear. My statement was meant to say. They function the first time OK and again after a few cycles. If you can see them. Does the LED flash on the module even when the messages are missing?