Brian H

What is the device? I would suspect the device itself. If it need to be kept cold enough with freeze spray or it is intermittent or unresponsive at all. If the devices output is not a mechanical relay but a solid state switch. That could possibly be a factor.

I thought you said input two was working when wired to the new devices schematic. In your September 12 post. Your Wednesday post must have been where you updated the status to not reliable. The wiring in the forums schematic will not work as both + and - 24Volts are needed on the I2 terminals. ELA gave you a great set to tests. If it worked intermittently meter tests of the On and Off voltages will give a good indication of what maybe the problem. Do you know if the switch in the device is a mechanical type. That sometimes can get intermittent? How far away from the EZIO2X4 is the new device and what gauge wire are you using?

I missed the difference between the Devices.pdf and the Forum.pdf files. You had it correct in the New Devices.PDF and I thought you said it was OK. Go back and rewire it to the New Devices.PDF. Forum.PDF is wrong. I2+ to the RED +24V in the device. I2- to the White switched signal out from the device.

Hope this may help. Though it may confuse things. The Isolated Inputs use a Opto Coupler for the input. It looks like a small 8 pin IC. When you put a +DC voltage on one of its + inputs through an internal current limiting resistor and a -DC on one its - Input. An LED inside the module turns on. The light from the LED turns on a Photo Transistor inside the coupler. That signals the internal electronics of the EZIO2X4 the Input is On. The External input voltage never gets directly connected to the EXIO2X4 electronics so it is isolated from the outside world. The Analog Inputs are directly connected to the EZIO2X4s electronics. So it can use a limited voltage range input and outside noise and garbage can get into it.

The schematic is correct. Using the +5V for sensing the I1 connections and the devices +24V for sensing the I2 connections. Isolated inputs use an opto isolator component. To completely isolate the modules electronics from the outside world. To turn it On. You have to put +5VDC to +30VDC to the +I1 or +I2 terminal and the -I1 or -I2 terminal to the negative of the supply. Through a switch in your application. The DC current through the isolator input. Tells the modules electronics the input is On. In your case I1 is using the internal +5 supply so you have the GND on the module switched on and off to sense I1 state. I2 in your case has the external devices +24VDC on the I2+ and the I2- switched to the 24 volt supply of the external device. When I mentioned the GND connection in an earlier reply here. It was when you thought you would use the +5VDC of the module for the external device on I2. Forget that as you are using the external devices -24volt common reference. The I3 AN1 and I4 AN2 terminals are connected to the internal electronics. They are not isolated to the outside world and could be damaged by voltages or spikes on them. They are also high impedance and can pick up stray AC hum. That is why some say ground them if not in use.

The power LED on the ISY994i. Is powered directly from its wall wart power supply. If other things are still OK and the power LED is off. It is possible the LED circuit has an issue. We have seen messages that the wall wart supply was failing but the ISY994i also didn't boot correctly or do programs in its memory.

Looks nice. Thank you for sharing the finished product and assembly information.

The Insteon 240V Load Controllers {NO and NC} are now marked as Unavailable. So they may not be an option at this time.

Not tedious. The attached New Devices PDF file shows. You have +24VDC from the device in to I2+ and the the White contact to the I2- connection. That switches to the devices 24VDC common. That should work fine. My comment on the GND was for using the modules internal 5 volt supply not the devices 24VDC supply. That may have muddled things. If you have the proper sensor reading you wanted to see. You are correctly connected.

You can do the Start Linking method. That will add it to the ISY setup with its six digit ID. Another way is to Set Button manually link it to a module already in ISY. Then Tools, Diagnostics, Show Device Link Table on the module you manually add the unknown modules address. There should be an extra link listed that the ISY setup does not know about.

Good to see you have it working.

You are not alone. There are a few messages here where the power supply was failing. I have had a few myself. 5V 500mA, 5V 1A. My ISY26, ISY99i and presently sold ISY994i. The ISY994i has a wide range of voltages it can use. Message here indicated 5V DC to 30V DC. UDI is presently selling a 12 Volt 1A replacement. On their direct sales page. My thoughts are 500mA maybe cutting it close. If you have an added board like Z-Wave.

ISY994i Administrative Console. Tools. Diagnostics. Show devices Link Table. Pick the module you manually added the 2477D. After the modules link table is read. Use the compare tab on the links display screen. It should show the link the ISY994i did not know about.

Smartenit makes a few different Insteon/X10 compatible modules. https://smartenit.com/product/iot4r/ One is a 4 relay with both NC and NO connections. The new replacement also has Wi-Fi in it. The earlier one with out the WI-Fi is sold out. I don't have one so I can't say how well the ISY994i can control and modify things. Like the I/OLinc it looks like a a power line only device.

The 2474DWH is a two wire switch that steals power through the load and need no Neutral power connection. Designed to only be used with Incandescent loads. So it will not work. Since it is a dimmer type and it will be incompatible with a inductive fan motor. Possible damage to the fans motor, the 2474DWK or both. Inductive loads should be controlled by a On/Off relay type switch.

Well there is one other way. I had to use on a 2430 ControLinc II tabletop module. As it is so old it didn't respond to a Start Linking. Also some of the of the Insteon modules they took the Insteon labels off relabeled with a X10 reference label and sold as X10 replacements. During X10's Bankruptcy and the time the new owners got product going again. Manually link it with the 2477D's Set Button to another module you have in your setup. Then do a Show Devices Links Table and Compare. On the module you manually linked the 2477D to. The extra link that the ISY994i does not know. Will be the address of the 2477D. Then you would have to remove the 2477D from the module. Manually or I believe if you do a Restore Device on the module you tested with. Will rewrite only the links it knows about . I did it slightly different. I added a new module to the setup and then manually linked the unknown device. Then a Show Devices Link Table and a compare.

Use Start Linking method. Then press the set button on the 2477D. After it is found. Use Stop Linking to finish the process.

I had issues with 2440 RemoteLinc remotes and the later 2413S PLM. Try this as it may help. Go as far away from the PLM as reasonable. So all the communications between the PLM and the 2440. Have to use a different Dual Band module to talk to each other. Before waking up the 2440 and starting the wanted changes writing.

Thank you for sharing your project. I am sure it will be a help to others.

Do you have the ISY994i Home Automation Cookbook? http://www.universal-devices.com/docs/production/The+ISY994+Home+Automation+Cookbook.pdf

Mine is My Lighting. I believe it was a carry over from back when I had an ISY26 and then an ISY99i.

I would think at one time. Many of us have gotten the address wrong. Like was that a 0 or a D. Some of the Mini Remotes had labels the addresses got worn off. I personally own one myself.

Do you have any idea where the ZWAVE message in the middle of the messages is coming from?

If you have a PRO version of ISY994i. Turning Off Automatic Updates to battery operated devices. Then write to them individually. May work.

Oh well. I too thought I had a good find.