MRS Electronic controller, German MRS Electronic model, MRS Electronic price

The MRS Electronic controller uses a chip to control the switches at various positions in the LED lamp circuit. There are two types of controllers with different structures due to different design methods. A micro-operation is an operation that cannot be further decomposed; performing a micro-operation always requires a corresponding control signal (called a micro-operation control signal or micro-operation command). A digital computer can basically be divided into two parts: the control unit and the execution unit. The controller is the control unit, while the arithmetic logic unit, memory, and peripheral devices are the execution units relative to the controller. One connection between the control unit and the execution unit is through control lines. The control unit sends various control commands to the execution unit via control lines; these control commands are usually called micro-commands, and the operations performed by the execution unit after receiving the micro-commands are called micro-operations. Another connection between the control unit and the execution unit is feedback information. The execution unit reflects the operation status to the control unit via feedback lines, allowing the control unit to issue new micro-commands based on the state of the execution unit; this is also called "status testing." Micro-operations are basic operations within the execution unit.

MRS Electronic controller types

1) Low-voltage LED product controller: Low-voltage LED products are generally designed for a voltage of 12V-36V, with 3-6 LEDs connected in series per circuit, using resistors for voltage drop and current limiting, with each circuit current below 20mA. A LED product consists of multiple circuits of LEDs. Advantages include low voltage, simple structure, and ease of design; disadvantages include high current when the product scale is large, requiring a low-voltage switching power supply. Due to these limitations, low-voltage transmission over long distances is not possible, restricting use to small-volume products such as sign text and small patterns. Based on these characteristics, the controller design specifications are: for 12V, use 75A/30V MOS power transistors for control, with an output current of 8A per circuit; for 24-36V, use 60A/50V MOS power transistors for control, with an output current of 5A per circuit. Users can select the number of controller circuits based on the above specifications; for jumping effects, choose the NE20 low-voltage series, and for gradient effects, choose the NE10 low-voltage series controller. Note that LEDs must use common anode (+) connection, with the controller controlling the cathode (-); the controller does not include a low-voltage power supply. 2) High-voltage LED product controller: High-voltage LED products are designed for AC/DC 220V voltage, with 36-48 LEDs connected in series per circuit, and each circuit current below 20mA. There are two current-limiting methods: one is resistor current limiting, which results in high resistor power consumption; it is recommended to connect one 1/4W metal film resistor in series with every 4 LEDs for uniform heat distribution, as this connection is the most stable and reliable. The other is resistor-capacitor series current limiting, where most of the voltage drop occurs across the capacitor, resulting in low resistor power consumption; this method can only be used for stable continuous lighting. If flashing occurs, capacitor energy storage can double the voltage, easily damaging the LED. Any LED using a controller must use resistor current limiting. LEDs are generally one meter per circuit, with a power of 5W, and three-color power per meter is 15W. Common gradient controllers: NE112K controls DC 1200W; NE103D handles AC load 4500W and DC load 1500W. If there are many flashing tube units, use NE112K; if only overall flashing is needed, use NE103D. If using gradient mode, pay attention to load matching; neon lights and LEDs have different luminous distribution characteristics, so different types of loads cannot be mixed in the same circuit. 3) Low-voltage serial controller: The characteristic of low-voltage LED product serial controllers is the large number of control circuits, achieving control through serial signal transmission. Generally, controlling 512 units requires only 4 control lines. Serial LED controllers require registers on the LED light source board. The controller model NE040S can be selected, with a maximum capacity of 4096KBit. If the load is 512 units of LED, it can achieve a maximum of 8192 frames. Additionally, there are controllers used in the safety industry, which are devices that control detectors to monitor gas within various working intervals.

MRS Electronic controller structure

Instruction Register: A register used to store the instruction currently being executed or about to be executed. The instruction contains an opcode that determines the operation type and an address that indicates the source or destination of the operand. Instruction length varies with different computers, and the length of the instruction register varies accordingly. All computer operations are executed after analyzing the instructions stored in the instruction register. The input end of the instruction register receives instructions from memory, and the output end is divided into two parts. The opcode part is sent to the decoding circuit for analysis to indicate what type of operation the instruction should execute; the address part is sent to the address adder to generate the effective address, which is then sent to memory as the address for fetching or storing data. Memory can refer to main memory, cache, or register stacks used to store the instruction currently being executed. When executing an instruction, it is first fetched from memory into the data register (DR), and then transferred to IR. Instructions are divided into opcode and address code fields, composed of binary digits. To execute any given instruction, the opcode must be tested to identify the required operation. The instruction decoder performs this task. The output of the opcode field in the instruction register is the input to the instruction decoder. Once the opcode is decoded, it can send specific signals for the specific operation to the operation controller. Program Counter: A counter that specifies the address of the next instruction to be executed in the program, also known as the instruction counter. It functions as both an instruction address register and a counter. When an instruction is completed, the program counter, acting as the instruction address register, must have its content changed to the address of the next instruction, allowing the program to continue running.

MRS Electronic controller wiring

1) DC 24 V terminal: The 24 V terminal on the PLC can also provide current to external sensors (such as proximity switches or photoelectric switches). When the 24 V terminal is used as sensor power, the COM terminal is the DC 24 V ground. If an expansion unit is used, the 24 V terminals of the basic unit and the expansion unit should be connected. Additionally, no external power source should be connected to this terminal. If an overload occurs, the voltage will automatically drop, and the input at this point will not affect the programmable controller. The number of input points for each model of PLC is specified. Each unused input point does not consume power, so in this case, the ability of the 24 V power terminal to supply current externally can increase. 2) Input wiring: Generally accepts discrete signals from inputs such as limit switches and travel switches. Input terminals are the ports for signal conversion between the PLC and external sensor loads. Input wiring generally refers to the connection between external sensors and input ports. Input devices can be any passive contacts or collector-open NPN transistors. When the input device is activated, the input terminal is connected, the input circuit is closed, and the input indicator LED lights up. Galvanic isolation via optocouplers is used between the primary and secondary circuits of the input terminal. The secondary circuit includes an RC filter to prevent PLC malfunctions caused by input contact bounce or electrical noise coupled from the input lines. If a diode is connected in series in the input contact circuit, the voltage across the series diode should be less than 4 V. If a reed switch with an LED is used, the number of series diodes must not exceed two.

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