[GreenKeys] Model 15 Wiring

[Jim Cooper]

On 4 Oct 2020 at 18:23, ad7i wrote:

> There is a leaf spring contact set
> on the base that is normally closed
> when the typing unit is removed. 
> These contacts, when made, connect
> Terminal 46 (one side of the selector
> magnets) to Terminal 34 (one side of
> the keyboard).  These contacts become
> open (open circuit) when the typing
> unit is seated on the base.  What is
> the purpose of cross connecting the
> magnets to the keyboard when the
> typing unit is removed from this
> base? 

If the M15 is in a loop with other equipment, 
such as maybe a reperf, you would not want the 
loop circuit to go open when the typing unit was 
removed for service ...  those contacts most 
likely short the typing unit selector magnet 
circuit when they close. 

w2jc