The robot bartender users will need buttons to be able to select their drinks, as well as an emergency stop button to hit if they select the wrong beverage. In the following exercise, we will wire up the momentary push buttons into our ControlLogix 1756-IB16 digital input module.
If your card differs from 1756-IB16, you can search for your card in the Rockwell Digital I/O module wiring documentation link found in the Further reading section of this chapter.
The following exercise will connect our momentary push buttons to the digital input card. The following diagram details how we will wire our digital input cards, push buttons, and power supply:
Our digital input card has a shared ground at terminals 9 and 10 (GND-0 in the preceding diagram) and at terminals 19 and 20 (GND-1). Our digital input card wiring uses a shared positive bus bar for all six push buttons. Digital input...
