BFT Thalia button

[JoeF]

Have a BFT Thalia l, I was going to add a push button to control. I understand it needs to go between 60 and 61 fine. 
It says is default is Start E, what does start external mean. What's the difference between Start E and Start I?
Thanks

Hi,

Thanks for your message,

There realistically isn't much difference between the logic of START E and START I, both of these will follow a STEP-BY-STEP logic of which means you can open, close and stop the gate from the push button, the only difference is if the gate controller utilises traffic lights as this will trigger the corresponding output for the traffic light.

Hope this helps.

Kind Regards 
Joe