Solid-State Devices Used in Industrial Logic Circuits: SOLID-STATE LOGIC EQUIVALENT TO THE COUGAR TAIL-LIGHT ASSEMBLY CIRCUIT

Earlier in this section we discussed an example of relay logic used to tell a robot which type of taillight was placed on a carrier so the robot could insert mounting studs into it. This same circuit could also be designed to operate using solid-state logic chips. ill. 1 (below) shows the solid-state logic circuit for the taillight detection system. The inputs for this system are proximity switches just as in the relay logic circuit. The outputs are also relays that provide the same signal to the robot as in the previous example. The major difference in the solid-state logic circuit is that inverters are used with AND gates to provide the logic combinations that allow the circuit logic to produce the binary code, which indicates the program request being sent to the robot. The robot program uses the binary code to determine the insertion program that should be executed.