A Guide to Eyb/Schaller Megaswitches

[Yogi B]

This is my attempt at a guide to the switching function of the various Eyb/Schaller Megaswitches. This may be useful for those that want to stray from the officially presented wiring schemes, but avoid the extra complexity involved in wiring up a Megaswtich M.

Note, I won't be covering the Megaswitch M as this was recently done here.

Before I begin an important thing to note is that all the Megaswitches are essentially based on the switching function of a 4P5T (e.g. the Meagaswitch M or Superswitch), but have a limited number of terminals with predefined connections between the four poles which vary by switch. Therefore I've presented the information here in 4-row tables, one row for each pole; with one column per throw, or switching position.

Alongside the tables I've included links to information about that switch, ranging from Schaller's schematics, images of the switch, and other posts from elsewhere on the forum. These may include other useful information, but primarily serve as an easy means to verify the information provided here.

N.B. The tables within this post use the convention whereby position 1 is with the switch's lever in the bridge-most position, some of the linked resources use the opposing convention.


Megaswitch S (original)
Schematics
@dreamert's post on the Megaswitch S

	Throws
Commons	1	2	3	4	5
Terminal 4		Terminal 1	Terminal 1	Terminal 1
Terminal 4	Terminal 3	Terminal 3		Terminal 2	Terminal 2
Terminal 8		Terminal 5	Terminal 5	Terminal 5
Terminal 8	Terminal 7	Terminal 7		Terminal 6	Terminal 6

Megaswitch S 3.0
Images: Front, Rear
Edit 2021-09-25: corrected thanks to nicfox's post below.

	Throws
Commons	1	2	3	4	5
Terminal 4		Terminal 5	Terminal 5	Terminal 5
Terminal 4	Terminal 3	Terminal 3	Terminal C	Terminal 2	Terminal 2
Terminal 8	Terminal B	Terminal 1	Terminal 1	Terminal 1	Terminal A
Terminal 8	Terminal 7	Terminal 7	Terminal D	Terminal 6	Terminal 6

Megaswitch T (original)
Schematics

The "T" variants use the same exact circuit board as the "S" variants (the Schaller versions actually say "S+T" on the PCB), but the switching mechanism only has three stops, skipping the 2 & 4 positions. As such their functionality can be easily discerned from the above tables, but for the sake of clarity I've gone ahead reproduced the stripped down versions too.

	Throws
Commons	1	2	3
Terminal 4		Terminal 1
Terminal 4	Terminal 3		Terminal 2
Terminal 8		Terminal 5
Terminal 8	Terminal 7		Terminal 6

Megaswitch T 3.0

Again, this is identical to the Megaswitch S 3.0 albeit with fewer stops.
(Edit 2021-09-25: again corrected thanks to nicfox.)

	Throws
Commons	1	2	3
Terminal 4		Terminal 5
Terminal 4	Terminal 3	Terminal C	Terminal 2
Terminal 8	Terminal B	Terminal 1	Terminal A
Terminal 8	Terminal 7	Terminal D	Terminal 6

Megaswitch E (original)
Schematics
@chrisk's post on the Megaswitch E & E+

	Throws
Commons	1	2	3	4	5
Terminal 3			Terminal 2	Terminal 2	Terminal 2
Terminal 3		Terminal 1		Terminal 1
Terminal 3	Terminal 7	Terminal 7	Terminal 6
Terminal 4		Terminal 6	Terminal 5	Terminal 5

Megaswitch E+
Schematics
@chrisk's post on the Megaswitch E & E+

	Throws
Commons	1	2	3	4	5
Terminal 3			Terminal 2	Terminal 2	Terminal 2
Terminal 3		Terminal 1		Terminal 1
Terminal 3	Terminal 9	Terminal 9	Terminal 8
Terminal 4		Terminal 7	Terminal 6	Terminal 5

Megaswitch E 3.0
Images: Front, Rear

	Throws
Commons	1	2	3	4	5
Terminal 4	Terminal 3	Terminal 2	Terminal 1
Terminal 8		Terminal 6	Terminal 5	Terminal 5	Terminal 5
Terminal 8	Terminal 7	Terminal 7	Terminal 7	Terminal 6
Terminal 12			Terminal 11	Terminal 10	Terminal 9

Megaswitch P & Megaswitch P 3.0
Schematics
Images: Front, Rear
Images (3.0): Front, Rear

	Throws
Commons	1	2	3	4	5
Terminal 2	Terminal 7	Terminal 6	Terminal 7	Terminal 7	Terminal 6
Terminal 1		Terminal 5		Terminal 2
Terminal 3		Terminal 2	Terminal 1	Terminal 5
Terminal 5	Terminal 4	Terminal 4		Terminal 4

[gumbo]

Great work...thank you!

Cheers,
Peter

[reTrEaD]

Schaller is now marketing a rotary version of all their Megaswitch models.

Here's the M model in rotary version, compared to the M model in standard blade version:

[nicfox]

Oct 8, 2018 19:52:08 GMT -5 Yogi B said:

This is my attempt at a guide to the switching function of the various Eyb/Schaller Megaswitches. This may be useful for those that want to stray from the officially presented wiring schemes, but avoid the extra complexity involved in wiring up a Megaswtich M.

...

Megaswitch S 3.0
Images: Front, Rear

	Throws
Commons	1	2	3	4	5
Terminal 4	Terminal B	Terminal 1	Terminal 1	Terminal 1	Terminal A
Terminal 4	Terminal 3	Terminal 3	Terminal C	Terminal 2	Terminal 2
Terminal 8		Terminal 5	Terminal 5	Terminal 5
Terminal 8	Terminal 7	Terminal 7	Terminal D	Terminal 6	Terminal 6

...

Hi, I have a Megaswitch S 3.0 and it didn't measure continuity according to the table above. After figuring out what was going on, it looks like the first 'Terminal 4' row should actually be labelled 'Terminal 8', and the first row labelled 'Terminal 8' should actually be labelled 'Terminal 4', giving:

Megaswitch S 3.0
Images: Front, Rear

	Throws
Commons	1	2	3	4	5
Terminal 4	Terminal 3	Terminal 3	Terminal C	Terminal 2	Terminal 2
Terminal 4		Terminal 5	Terminal 5	Terminal 5
Terminal 8	Terminal B	Terminal 1	Terminal 1	Terminal 1	Terminal A
Terminal 8	Terminal 7	Terminal 7	Terminal D	Terminal 6	Terminal 6

[Yogi B]

Sept 25, 2021 7:44:21 GMT -5 nicfox said:

Hi, I have a Megaswitch S 3.0 and it didn't measure continuity according to the table above. After figuring out what was going on, it looks like the first 'Terminal 4' row should actually be labelled 'Terminal 8', and the first row labelled 'Terminal 8' should actually be labelled 'Terminal 4'

Many thanks for that, and welcome to the forum!

I've updated my the tables for both the S 3.0 & T 3.0 in my OP. You'll understand my source of confusion: Terminals 1 & 5 are the other (arguably more sensibly labelled) way around on the previous version. I should've been more vigilant when checking the images of the PCB.