Allen Bradley 1784-T50 Industrial Terminal keyboard

Rogue77 · 28 Mar 2018, 20:20

The keyboard looks similar to a IBM model f at but I am not one hundred percent convinced that this is even made by IBM, may I get some help confirming this keyboard manufacturer and if possible the switches?
Here is a photo

Blaise170 · 28 Mar 2018, 20:22

Definitely not IBM, looks like it is probably foam and foil based on LED placement.

Nuum · 28 Mar 2018, 20:23

The keycaps look like Signature Plastic's DCS profile, so maybe MX type switches or switches with MX crossmount?

Blaise170 · 28 Mar 2018, 20:36

Actually it looks like it might be foam and foil with MX sliders, I found another board from the same series that appears to actually be MX.

Of course this is completely speculation since these are the only photos I can find.

Rogue77 · 28 Mar 2018, 20:43

I just found these switches on eBay like this? https://www.ebay.com/itm/Allen-Bradley- ... Swx~JWFWbK

Blaise170 · 28 Mar 2018, 20:48

Huh perhaps those are the ones used in this board. Have no idea what those switches are, though I'd assume some kind of linear switch like SMK or Mitsumi.

Daniel Beardsmore · 28 Mar 2018, 22:09

The ones on eBay are [wiki]Clare-Pendar Series S840[/wiki], with the crenellation mod.

Rogue77 · 07 Apr 2018, 09:50

Its a rubber dome, tactile with removable sliders that are cherry mx compatible.

Daniel Beardsmore · 07 Apr 2018, 12:42

That looks to be [wiki]Maxi Switch dome with slider[/wiki] then. Keycaps … Comptec I suppose.

What do the 1-unit LED switches look like?

Rogue77 · 08 Apr 2018, 02:31

Here are the led switches

JP! · 08 Apr 2018, 02:50

Thanks for sharing, I always wondered what switches these had. I almost picked one up but didn't want to make the gamble.

Rogue77 · 08 Apr 2018, 04:22

The switches are very tactile but the bump is longer similar to other switches like topre, its a lot quieter than cherry mx browns, its weighting feels similar to mx brown, a bit heavier. Overall a good tactile rubber dome switch. I like these switches better than the model m with buckling springs over membrane that I tried recently.

Daniel Beardsmore · 08 Apr 2018, 20:07

Oh, of course, this probably uses a PCB inside, so having LEDs within keys isn't difficult. Fujitsu had special LEDs that connected to the matrix for the FKB4700, to allow in-key LEDs to operate from a membrane.

Rogue77 · 17 Apr 2018, 18:44

I converted it with at to ps2 to a ps2 to usb converter and it works perfectly all leds work and so on.