Here is a datasheet that we drafted for the limit switch. This datasheet can be used to determine mounting specifications, understand the throw of the roller and to understand the general functionality of the switch and where the NO/NC/COM leads are located.
This is a diagram for connecting limit switches to the input pins of the breakout board.
Single Switch Operation:
Using a single snap action limit switch. The switch can be wired as NO, or NC with this configuration. NC would cause the circuit to open if the switch is activated since it is "normally" closed (closed when the switch is not activated). NO would cause the switch to close when activated since the circuit is "normally" open when the switch is not activated.
Multiple Switch Operation:
Multiple switches require unique configurations with respect to their NO or NC operation. If an NC connection is desired for the circuit, the connection to each switch my be serial. If a switch is activated, the circuit is broken (open). If an NO connection is desired, the circuit must be wired in parallel. If a switch is activated, then the circuit is completed (closed).