You should learn to identify them, they are usually green or green/yellow. Terminal Ground Blocks - A terminal block ground is usually internally grounded to the panel. Contactor - A contactor is the same as a relay but is usually larger in size for a motor and consist of three poles.ġ5. They usually monitor three motor phases.ġ4. Overload - An overload protects loads, usually motors, from pulling more amps that the overload allows. Most of us don't even know that DIN is a German acronym.ġ3. If the panel is Pneumatic controller/ Indicators which are. The panel is called PLC control panel with a PLC installed, associated wiring, power supplies. Panels are named based on a functional media such as electrical, electronic, air, and oil. I, along with every other Systems Integrator, has to look that fact up. The control panels are designed based on the type of energy and dynamics associated. A note to instructors, don't make DIN=Deutsches Institut für Normung a test question. It stands for Deutsches Institut für Normung which is who published the original specifications for it. DIN Rail - Is a metal rail that allows the mounting of many industrial control components. Power is applied to the coil which creates a magnetic field that switches the relay contacts.ġ2. Relays - A relay is an electronically or magnetically operated switch. That doesn't mean that circuit breakers are better since they can be reset and reused. Fuses - Fuses, like circuit breakers protect loads from pulling too much current but are only good for one use. Breakout Boards - Breakout boards are specialized terminal blocks that can be used to simplify wiring of components that have connectors that would normally need soldering or reduce the labor of internal wiring.ġ0. Some are for internal connections and some are for connecting field components to terminal blocks.ĩ. Terminal Blocks - Terminal blocks are connection points to tie wires together. Wire Duct - Wire duct is usually ran around the perimeter of the panel and in between rows of electrical components to house the wires that interconnect the electrical componentsĨ. Using Lockout Tagout procedures, this should be isolated when working on the control system.ħ. Disconnect Switch - The disconnect switch will usually disconnect all electrical power from the control panel. Circuit Breaker - Circuit breakers protect loads from pulling too much current.Ħ. Ethernet Switch - Just like the Ethernet switch that you probably have at your house, many control panels have Ethernet switches for connecting PLCs, HMIs, networked I/O, and information systems.ĥ. Most commonly it converts 120VAC to 24VDCĤ. DC Power Supply - Where as a transformer converts an AC voltage to another AC voltage, a power supply converts AC or DC to a DC voltage. #AC CONTROL PANEL PLUS#Details of what inputs and outputs are plus further details of how a PLC operates are in later lessonsģ. #AC CONTROL PANEL CODE#It reads inputs and executes code based off of them, then adjust the outputs of the control panel. Programmable Logic Controller (PLC) - This is the "brains" of the control panel. Most popularly would be converting 480VAC to 120VAC for creating control power.Ģ. Transformer - Transformers are used to convert one AC voltage to another AC voltage.
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