1121 Switch controller vs 1122 Switch controller


JJones53

New Member
Hey Guys, I'm new to the Forum but have a question regarding the difference between the two above mentioned controllers. Tandem says they are interchangeable because of (1) a wiring difference due to derailing vs. non-derailing and the rivet patterns on the base. Since Tandem doesn't show a picture, I can't figure out which one is which?
Thanks for your help!!
 
Picture of the 1121 here
Picture of the 1122 here
 



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