PREMETEC controller German PREMETEC model PREMETEC price

PREMETEC controller is the core of the access control system, the system brain that controls entrance and exit channels. It evolved from traditional door locks. The door controller is an access control product that integrates card reading and control, available in standalone and networked versions. Simply put, the access controller is a machine that integrates the access control board and card reader; higher-end models also include a keyboard and display. It can be used as a complete access control system by simply connecting to power. If a door uses card entry and button exit, the controller can only connect one card reader per door, called a unidirectional controller. If a door uses card entry and card exit (an exit button can also be connected), each controller can connect two card readers per door: one entry card reader and one exit card reader, called a bidirectional controller.

PREMETEC Controller Introduction

The controller uses microelectronics technology to perform various control functions. Under the action of input signals at the site, it controls the actuators at the site to operate according to certain rules, following the pre-input program. According to user usage methods and characteristics, programmable controllers can be divided into two completely different markets: project-oriented markets and OEM-oriented markets. In the main application projects for programmable controllers, they are mainly used in industries such as metallurgy, automotive, municipal, and electric power; in the OEM market, programmable controllers are mainly used in traditional industries such as textile machinery, packaging, and machine tools. The most basic and widespread application is sequential logic control, used to replace relay control systems to achieve logic control and sequence control. It can be used for single-machine control, multi-machine control, and automated production line control. The PLC controls mechanical moving parts to perform corresponding operations based on operation buttons, limit switches, and other command signals given at the site.

PREMETEC Controller Functions

1) Motion Control: In the machining industry, programmable controllers are integrated with Computer Numerical Control (CNC) to complete motion control for machine tools. Many PLC manufacturers have provided single-axis or multi-axis position control modules for driving stepper motors or servo motors. In most cases, the PLC sends data describing the target position to the module, and the module 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. It has been used in centerless grinding, stamping, complex part segmented punching, roll forming, and grinding applications. 2) Timing Control: The PLC provides users with a certain number of timers and sets timer instructions. For example, OMRON's CPM1A, each timer can achieve timing control of 0·1~999·9s or 0·01~99·9s. 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 certain ways. Timing accuracy is high, and timing setting is convenient and flexible. The PLC also provides high-precision clock pulses for accurate real-time control.

PREMETEC Controller Wiring

Programmable controllers have 3 types of outputs: 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 operates, 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 the same type and voltage level of power supply. 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 output, the magnitude of the inductive load affects the working life of the relay, so a long working life for the relay is required.

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