ERMA controller German ERMA model ERMA price

The ERMA controller integrates the basic components of an electronic computer, such as the central processing unit (also known as the CPU, mainly composed of an arithmetic logic unit and a control unit), memory, bus, and input/output interfaces, onto a single silicon chip using integrated circuit technology. Due to the small size of the microcontroller (only finger-sized) and its powerful functionality (equivalent to a simple computer), it is widely used as a controller in electronic devices. From missiles, rockets, and advanced national defense weapons to modern household appliances such as televisions and microwave ovens, microcomputers are invariably used as controllers. Therefore, from a control perspective, it is often referred to as a single-chip controller. The operation of a single-chip microcontroller relies on software, i.e., pre-designed programs stored in memory.

ERMA controller principle

Electromagnetic chuck controller: AC voltage 380V is stepped down by a transformer, rectified by a rectifier into 110V DC, and then enters the chuck through the control device, magnetizing the chuck. For demagnetization, reverse voltage is applied to the circuit, enabling the controller to perform the demagnetization function. Access control controller: The access control controller operates in two modes: inspection mode and identification mode. In inspection mode, the controller continuously sends query codes to the card reader and receives responses. This mode persists until the card reader detects a card. When a card is detected, the card reader sends a different response to the controller's inspection command, transmitting the internal code data read from the card to the access control controller, which then switches to identification mode. In identification mode, the access control controller analyzes the card's internal code, compares it with the card data stored in the device, and executes subsequent actions. After completing the data reception, the access control controller sends a response command to the card reader to reset its status, and the controller returns to inspection mode.

ERMA controller features

1) Mainstream microcontrollers include CPU, ROM with 4KB capacity, RAM with 128 B capacity, 2 16-bit timers/counters, 4 8-bit parallel ports, full-duplex serial port, ADC/DAC, SPI, I2C, ISP, IAP. 2) Simple system structure, easy to use, modular implementation; 3) High reliability of the microcontroller, capable of operating for 10^6 to 10^7 hours without failure; 4) Strong processing capability and high speed. 5) Low voltage and low power consumption, suitable for producing portable products. 6) Strong control functionality. 7) Strong environmental adaptability. 7) The microcontroller has a small volume; as a computer system, its internal chip has a simple structure but complete functionality, making it very convenient to use and suitable for modular applications. 8) The microcontroller has a high level of integration and strong reliability; even during long-term operation, no failure issues occur. 9) Microcontrollers operate at low voltage and low energy consumption during application, making them a primary choice in daily life and providing convenience for production and R&D. 10) Microcontrollers have strong data processing and computational capabilities, can be applied in various environments, and possess strong control capabilities.

ERMA controller applications

Since smart electronic devices are often carried outdoors, their energy consumption requirements are very high. Therefore, energy-saving control modules are often designed to extend the standby time of smart electronic devices. The application of microcontroller technology in energy-saving control is mainly divided into the following aspects: First, when smart electronic devices are used outdoors, they are mostly in a light-load mode. In this case, energy-saving control is required to further reduce power consumption while ensuring basic functions. By collecting data from smart electronic devices, the microcontroller can infer that the current device load is low, allowing it to reduce voltage and current output to achieve energy savings. Second, the microcontroller can control the rhythm of energy consumption. For example, in the Xiaomi Band, data such as heart rate, sleep, and step count are collected, stored locally, and reported at minute-level intervals. When information is not being reported, the device remains in a low-energy state. During reporting, network transmission consumes energy. The microcontroller controls the energy consumption rhythm, keeping the band in a low-energy state for most of the time, enabling a standby time of more than seventy-two hours.

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