28 Questions
What is the commonly used range of power supply and operating voltages in industrial automation for sensors and control components?
12–24 V DC and AC
Which standardized signal levels and paths are commonly used for mixing and matching different devices and connections to system interface and control points?
4–20 mA current loops
How are sensors and actuators connected to programmable logic controllers (PLCs) in industrial automation?
Via I/O ports and modules
What do the modules used for connecting sensors and actuators to programmable logic controllers (PLCs) often include?
Signal conditioning, level adjustment, provisions for structured industrial wiring, grounding, and safety features
Which buses may be used to interface already digitized signals in industrial automation?
I2C (Inter- Integrated Circuit) or SPI (Serial Peripheral Interface)
What is the commonly standardized signal level used for providing mixing and matching of different devices in industrial automation?
4–20 mA current loops
In the context of industrial automation, what is the primary function of a PLC?
Performing primary signal conversion and processing
What role do commercial IoT gateways play in the context of existing industrial automation?
Interfacing with legacy and DCS systems
What is a characteristic of sensors and actuators in industrial automation systems?
They may perform internal signal conversions and processing
What is the purpose of structured wiring in connecting industrial sensors and actuators to PLCs?
To provide a reliable and organized connection
What is a benefit of adding IoT to existing industrial automation systems?
Ability to aggregate process data for holistic view and optimization
What distinguishes the role of a PLC in industrial automation systems?
Executing built-in control sequences for local automation and alerting
How does structured wiring help in connecting industrial sensors and actuators to PLCs?
It ensures reliable and organized connections
What is a key role played by commercial IoT gateways in the context of industrial automation?
Interfacing with legacy and DCS systems
What distinguishes the function of sensors and actuators in industrial automation systems?
Some may perform internal signal conversions and processing
What is the primary function performed by most IoT gateways in existing industrial automation?
Interfacing with legacy and DCS systems
Which type of buses are commonly used to communicate digitized outputs in integrated sensors?
I2C and SPI
What additional components may stand-alone sensor assemblies use for wireless communication?
Radios, modems, and communication software
Which sensors are commonly found in popular personal activity monitors that use Bluetooth Low Energy (BLE) for wireless connection?
Gyroscope, accelerometer, compass, and altimeter
What additional ability do smart home thermostats often have in terms of connectivity?
Connect to the Internet via home Wi-Fi
As a design choice, what can smart sensors support in IoT systems?
Standard protocols and connection to any suitable level of hierarchy
What is the common method used by integrated sensors to reduce the number of signal traces for natively analog measurements?
Communicating via wired serial buses
What is the purpose of signal conditioning and amplification circuitry when interfacing raw transducer outputs?
To match the range of their terminating points and interfaces
What is the additional circuitry needed for sampling and converting analog signals into digital values?
Analog-to-digital converter (ADC)
What is the function of an IoT gateway in the context of industrial automation?
To connect the IoT system with external networks
What is the primary role of a programmable logic controller (PLC) in interfacing sensors and actuators?
To convert analog signals into digital signals
What do digitized values need to be post-processed for, after being converted from analog signals?
For converting to engineering units
Which type of circuitry is typically used to match the range of raw transducer outputs with interfaces, such as 0–5 V for voltage or 4–20 mA for current inputs?
Signal conditioning and amplification
Test your knowledge about connecting sensors and control components in industrial automation. Explore the standardized practices and power supply options commonly used in the industry.
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