Chapter 5-PLC Systems, Circuits, and Interface Devices 229 terminals is that 15. The advantage of using a PLC with both digital and analog input terminals and/or output 16. Some _is provided, and as a result, better control of the application occurs. can be directly connected to a PLC analog input section or module, while other PLCs require the analog signal to first be converted into a voltage or current signal that is within the specified range of the PLC's input section or module. 17. When PLC input sections or modules are designed for a specific type of analog signal but the sensor has digital output signals, a(n) _must be used. 18. A(n) _ is a load or actuator that delivers a variable position or speed according to the analog signal (voltage or current) being sent from the PLC analog output terminal. not used as 19. Magnetic motor starters, heating contactors, lighting contactors, and control relays are _ devices. 20. SSRs control the output voltage to a load. Multiple Choice 1. A system is a fluid power system that transmits power using a gas (air). A. pneumatic B. hydraulic C. mechanical D. combination 2. A is a control device that is designed to control high-power, non-motor loads. A. connector B. contactor C. relay D. transmitter 3. A(n) _ is used to produce work, light, heat, or sound or to display information. A. input device B. output component C. sensor D. switch 4. A(n) is a device that controls an electrical circuit by opening and closing contacts in another circuit. A. optic isolator B. contact regulator C. control relay D. circuit manager relays draw high current when energized and produce high voltage spikes when 5. de-energized. A. Electromechanical B. Solid-state C. Drive D. Billion operation rated