I have 8 Harmony Hubs. They have 2 assignable IR outputs.
Can I cut off the emitters and combine all the signals and grounds from outputs 1 into a Xantech connecting block with power supply and then connect the IR outputs of the Xantech to devices. And using another connecting block do the same for outputs 2.

I'm not a Harmony person and I'm not sure why you would want to do this. My recommendation is to insert a resistor (470 - 1000 Ohms) or diode in series with each emitter output and connect the junction of these resistors/diodes into your Xantech.

Thanks for your quick reply.
The reason is - sticking 8 emitters on each of the 4 sources is not practical. Hence combining...
I would opt for a processor and remotes from RTI (or other company) but not at the cost, reliability and proprietary software which typically requires a programmer.

So, 16 outputs.

I take it you want to create just one signal from all these, and you won't EVER have IR commands sent to two or more receivers at the same time.
By the way, save some money -- get mono male to male 3.5mm cables. These are like cut off IR emitter cables except you don't pay for the LED and you don't have leftover cut off LEDs when you're done.

You don't need any Xantech power supplies. The power supply input on a Xantech connecting block is only there to provide power to an IR sensor, if one is used. When taking an IR signal and sending it to emitters, the block only is an IR input and a resistor between the IR input and each IR output.
|and then connect the IR outputs of the Xantech to devices. And using another connecting block do the same for outputs 2.
You should be able to do this if you add one thing: a diode in series with each output on the hot side from each Harmony Hub (so, 16 diodes). The diode is to be oriented with the stripe away from the hub. The purpose of this is so that any signal coming out of a hub is blocked from going back into another hub. This is necessary to get this to work.

Let me clarify:

8 TV's
Harmony Hub at each TV location - hub will turn on the TV.
Output 1 and 2 of each hub will be extended to the rack of equipment, they will be assigned in the MyHarmony programming.
I have 2 cable boxes and 2 Apple TV's.
End result is to combine the 8 IR outputs from each Hub's output # 1 and combine the 8 IR outputs from each hub's output # 2
I hope this helps.

Ernie, I just re-read your reply, paragraph 3 is what information I think I am looking for.
Thanks.

What you are doing is a much more complicated version of a part that Xantech used to offer:

283M

[Link: letsautomate.com]?

Do as Ernie says and if it doesn't work you likely have the diodes backwards. Keep in mind you need one diode wired to every IR output, not one for each flasher.

Craig.

Do away with the Harmony and get a real remote that will allow multiple handheld units to talk to one or multiple addressable bases.

Will do

Have Pro Control and it continually has connection and other issues.
6 remotes, processor and pro panel - want to buy it all???

Harmony just works!

Harmony sucks mule dick. Pro Control is barely a step above Harmony. Get a professional system.

What would you suggest

I just checked my ProControl files and we have 181 in the wild. They are rock solid and we use them primarily on single room control (and occasionally zone 2). With the system you described, I'm guessing someone has mis-designed this system beyond its capability. The remotes' RF simply wont travel reliably past 45ft. If the pro panel is iffy, I'm guessing the wifi is the culprit. Your next logical step is RTI.

Edit: I just reread your system layout; someone definitely mis-designed this trainwreck.

Farthest remote is 25'.
They installed 2 pro control range extenders.
the app works very well, it's the remotes that lock up on the hour glass, and sometimes they require multiple button presses.
They had an installer here all day to sort out the wifi and test the RF through the remote controls. I understand that some of their clients like the remote, but the installer was honest and said I'm not the only one with issues.
Too much money spent on this stuff to be disappointed. My wife just wants to watch TV!

In 181 systems, I've literally have not had a single lockup. Very occasionally, if a client fails to charge a handheld and it completely discharges, you have to dipswitch it and every single time and they come back 100%. (we do not use the hourglass for "please waits" -- I'm guessing)