Brian H

I have a few UDI model products with different supply ratings. I have seen 5VDC to 30VDC as the input range. Mine where 5V .5A or 5V 1 Amp. Many here are using 12VDC at 1A or 2A. UDI in their sales page. Last time I looked was a 12VDC 2A. Power LED flashing is probably a defective power supply. I had a few between models all die and where replaced. Especially if yours is still the original.

If it was a power supply capacitor issue. I would think replacing them would help. If is the serial port chip then it may not help. At V2.3 they changed the chip to one with better ESD ratings and V2.4 and up has a new serial daughter board with the better chip and some signal protection on them. If you are having many PLM's giving the -10. You may want to verify the cable between the PLM and the ISY controller is 100% OK.

Both 2413U and 2431S where on the expected release dates data they posted. March of 2023. If the list is up to date.

Your diagram does not look correct. P2 on the diagram. Back side where pins are inserted. Pin 1 Top Left pin position. Pin 5 on the Top Right. Blue to P2 Pin 2, Brown P2 Pin 5, White to P2 Pin 3. Top left to top right: 1 NC, 2 Blue, 3 White, 4 NC, 5 Brown. Bottom row 6-9 all NC. All the rest of the wires from the network side. Should be insulated from each other and not connected to anything. As two of them are not used TTL versions of send and received signals.

This wiki entry may help. https://wiki.universal-devices.com/index.php?title=Resetting_Your_ISY

If it is functioning OK except the normally very bright Power LED. The LED maybe failing or the current limiting resistor maybe failing. As it is directly driven by the ISY internal power supply. If it starts also having dimmer indicator LED brightness or it starts to malfunction. I would suspect more than a Power LED circuit issue. Power supply range is 5VDC to 30VDC. Most find a 12VDC works fine. Note the ISY store now sells 12VDC 2 Amp replacements. Not too clear on the ISY994 being stocked again. As the eisy unit is in the near future and there is Z-Wave available also. I do remember a few other posts here. Where the users ISY99i was working fine but the power LED was Off. Didn't see any information on it effecting anything or a fix.

The ISY994i checks for a PLM at boot up. Not sure if the PLM dies as the system is used. Would be detected.

If you have not done it yet. The two LED's on the Network Jack on the ISY994i. May give you some information.

Glad you got it working again. Your reported finding may assist someone else with the same issue.

The closest Insteon modules. Would be the alert module and siren module. The siren module has a chime function also. Of course both are no longer in production and the alert was a real short time production device. You can still get the X10 chime module if you don't find something else.

Good idea. Though in my case it probably would not show much. I came from X10 use and have a JV Digital XTB-IIR. Coupler Repeater in use. It blasts over a 20 volt signal back on both phases of the house power. My lowest X10 signal is about 1.2V on an XTBM meter. It also knows enough to NOT see the end of an Insteon command and try and duplicate it as an false X10 command. I still have an X10 Palm Pad in use the control some of my Insteon modules that can have an X10 address added to them.

Your second question. The 2868-222 Siren Module It is a very Loud Insteon triggered siren. I have one in use. I left the sound reducing plastic film over the siren output port. As that is loud enough for me. It also has a chime function but I have no experience with the chime function. It may have been one of the early removed modules. There was a 2867-222 alert module also. It was an very short production run before the later siren module was released. It had a chime like output sound. Broyd made a very important point. The X10 chime module has a power line derived power supply. Either the + or - side of the power supply is directly connected to the HOT line input and logic supply.

Trying it in the same outlet as the PLM. Is a good idea. It would show if you have a power line signal to the Chime Module problem. If it chimes at the PLM location. You may have a new signal sucker or power line issue. One easy thing to do. Rotate both the House and Unit Code wheels around a few times. They sometimes get dirty and make a bad connection. So the address set on the wheels. Is not the addresses the module is actually using. Rotating may clean up a poor connection. The chiming at power up is normal but does not see if it actually will respond to an X10 On command.

The failing power supply. May have caused the controller to write garbage to the SD card. Power supply issues are a failure we see here. I had a few over the years myself. Glad you are back in business.

LED flashing in the bar graph display. Sounds like the power supply is full of ripple. I too would suspect the filter capacitors. Especially in the older model power line only models.

Glad you found the issue and are now working.

You need a 2413S serial port PLM. For use with an ISY994i. Connected to the serial connector on the PLM. It looks like a Network RJ45 cable but it is serial signals. Uses a network style cables between the PLM and the ISY994i serial connector Port A connector.

From the UDI wiki: https://wiki.universal-devices.com/index.php?title=Main_Page#Front_Panel_LEDs/Lights

Smarthome was very consistent with using the same cable. They where also used in the serial port connections on their X10 modules. Though some of the other pins in the RJ45 style connector where varied signals.

Yes it did have the RJ45 to DB9 serial cable in the box. Only three wires used. Hidden in the shipping cradle and not well pointed out.

Good information. The wide input range may definitely show less flicker.

Electrical feed to the home probably has issues. Electrician or power company checking maybe needed. If you don't have a meter or experience in properly and safely checking the readings yourself. If you have any plug in lights. Do they also flicker when directly connected to the outlet and not through the module? Are any dim and others extra bright? Appliances not on Insteon acting strange?

An FCC Type Acceptance number on the module. Would also indicate it was Dual Band with an Insteon RF Transmitter circuit in it.

The V2.3 was the first revision I have see with C7 and C13 changed to a capacitor made for a switching supply. I would still think of the PLM as a possible problem. Especially if a power off and cool down would make it work again. Empty or almost empty Link Database would be another clue. Having to Query the modules to show their present state maybe normal. If the ISY controller does not know the modules present state at power up.

You could also do a Query from the Administrative Console and see if the tripping also happens then.