foerster controller, German foerster model, foerster price

The foerster controller is the core of the access control system, acting as the system brain that manages entry and exit channels. It has evolved from traditional door locks. The door controller is an access control product that integrates card reading and control functions, available in both standalone and networked versions. Simply put, the access controller is a device that combines the access control board and card reader; higher-end models also include a keyboard and display. It can function as a complete access control system simply by connecting to a power supply. For a single door where entry is via card swipe and exit is via button press, the controller can only connect one card reader per door, known as a unidirectional controller. For a single door where entry is via card swipe and exit is also via card swipe (an exit button can also be connected), each controller can connect two card readers per door: one for entry and one for exit, known as a bidirectional controller.

foerster controller classification

1) Non-networked door controller: A single unit manages one door. It cannot be controlled via computer software, nor can records be viewed; control is performed directly through the controller. Characteristics include low price and simple installation and maintenance. However, records cannot be viewed. It is not suitable for locations with more than 50 people or frequent staff turnover (referring to frequent hiring and resignations), nor for projects with more than 5 doors. 2) Networked door controller: This type of access control can communicate with a computer and is managed directly using software, including card and event control. Benefits include convenient management, centralized control, record viewing, and data analysis for other purposes. Characteristics include higher price and increased difficulty in installation and maintenance, but training is simple, and value-added services such as attendance tracking are possible. Suitable for projects with many people, high mobility, and many doors. 3) TCP/IP network door controller: Also known as Ethernet networked access control, this is a networkable access control system that connects computers and controllers via network cables. In addition to all the advantages of networked access control, it offers faster speed, simpler installation, support for a larger number of networked devices, and the ability to network across regions or cities. However, equipment costs are high, and computer networking knowledge is required. Suitable for large projects, locations with many people, applications requiring high speed, and cross-regional installations.

foerster controller functions

1) Motion control: In the machining industry, programmable controllers are integrated with Computer Numerical Control (CNC) systems to perform motion control for machine tools. Many PLC manufacturers provide single-axis or multi-axis position control modules for driving stepper or servo motors. In most cases, the PLC sends data describing the target position to the module, which moves one or several axes to the target position. As each axis moves, the position control module maintains appropriate speed and acceleration to ensure smooth motion. This has been applied in centerless grinding, stamping, segmented punching of complex parts, roll forming, and grinding applications. 2) Timing control: The PLC provides users with a certain number of timers. Timer instructions are set, such as OMRON's CPM1A. Each timer can achieve timing control from 0·1 to 999·9s or from 0·01 to 99·9s. The SIEMENS company's S7—200 series provides timers with time base units of 0·1s/0`01s and 0·00s, achieving timing from 0·001s to 3276·7s. Timing duration can be extended in specific ways. Timing accuracy is high, and setting is convenient and flexible. The PLC also provides high-precision clock pulses for accurate real-time control.

foerster controller wiring

Programmable controllers have 3 output types: relay output, thyristor output, and transistor output. Output terminal wiring is divided into independent output and common output. When the PLC output relay or thyristor activates, the two output terminals with the same number are connected. In different groups, output voltages of different types and voltage levels can be used. However, within the same group, outputs must use power supplies of the same type and voltage level. Since the PLC output components are encapsulated on the printed circuit board and connected to the terminal block, short-circuiting the load connected to the output components will burn out the printed circuit board. Therefore, fuses should be used to protect the output components. When using relay outputs, the magnitude of the inductive load affects the relay's service life; therefore, long relay service life is required.

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