LK is a programmable controller (PLC) product launched by Hollysys for medium and high-performance control fields. Fully integrating the advantages of DCS and PLC, using high-performance analog processing technology, miniaturized structural design, open industry standards, and general system platform, the product not only has powerful functions, but also has higher reliability, better openness and ease of use, and the product has passed CE and UL certification.
LK is widely used in rail transit, energy, water treatment, water conservancy and hydropower, heating, building materials, electric power, textile, papermaking, printing, pharmaceutical, chemical, metallurgy, intelligent building and other fields.
Features:
Performance
It is equipped with an industrial-grade (533MHz) processor with nanosecond (13ns) processing speed
Up to 57,344 digital I/O and 3,584 analog I/O
The program size can be up to 16MB, the data capacity can be up to 64MB, and the power-down hold area can be up to 1MB
High reliability
Power supply redundancy, CPU redundancy, Ethernet redundancy, PROFIBUS-DP bus redundancy are supported
It has the function of presetting the output in the event of a communication failure
Provide three proof (moisture-proof, anti-salt spray, anti-mildew) module
Multi-machine interconnection to achieve data sharing
Data sharing between up to 32 stations is possible via its own integrated Ethernet interface
The size of the shared data can be configured to share up to 700 words at a time
Ideal for metro and highway tunnel monitoring applications
Ease of use
The module is miniaturized and intelligently designed, with self-diagnosis function
Flexible SD memory card for engineering recovery, backup, encryption
It is IEC61131-3 compliant and supports LD, IL, FBD, ST, SFC, and CFC programming languages
Ease of maintenance
It supports live plugging and unplugging, and can replace faulty modules without stopping the machine
The terminal blocks are designed to be independent of the I/O module and the terminals are pluggable
The backplane is designed with anti-mixing pins to avoid inserting the wrong module
Openness and extensibility
Integrated Ethernet, PROFIBUS-DP, RS232, RS485 interfaces
It supports multiple communication protocols such as TCP/IP, MODBUS, PROFIBUS-DP, OPC, and free port
Remote I/O can be extended up to 20 km
Hardware architecture
The LK hardware system is composed of CPU module, I/O module, communication module, special function module and backplane, which can be flexibly combined according to different applications and different needs to meet the wide range of applications of automatic control.
CPU module
The heart of the entire system, which is used to execute user programs, process local I/O and process data, and distribute I/O via fieldbus control
A variety of CPU modules are available for users to choose from, with built-in PROFIBUSDP interface, Ethernet interface, RS232 and RS485 interface
LED indicators, key switches, station address DIPs, SD memory card slots, and spare battery slots are available
I/O modules
It is used for the processing of DI/DO and AI/AO signals, including DI, transistor DO, voltage/current/thermocouple/RTD AI, voltage/current AO, etc
A wide range of I/O modules are available to meet the needs of different applications, from discrete control to process control
Communication interface module
Used for system expansion and communication with third-party devices
It supports TCP/IP, PROFIBUS-DP, MODBUS, OPC, free port and other protocols
Special function modules
Designed for tasks such as high-speed counting
Backplate
It is used to install all modules and provide data communication connections between the CPU and other modules
It includes a local backplane, which is used to install CPU modules, I/O modules, communication interface modules, and special function modules, and an expansion backplane is used to install communication interface modules and I/O modules
Redundant systems
For some control occasions with high reliability requirements, PLC failure will cause large economic losses or social impacts. For this purpose, LK offers users a solution for redundant systems that support power supply redundancy, CPU redundancy, Ethernet redundancy and PROFIBUS-DP bus redundancy.
The LK redundancy system consists of a CPU module that supports redundancy functions, a PROFIBUS-DP communication interface module, a local backplane with dual CPU sockets, an expansion backplane, and an I/O module.
Redundancy
Data is synchronized between the two CPUs via a high-speed backplane bus, eliminating the need for a dedicated synchronization module
The PLC hardware configuration and program writing are the same as those of the stand-alone system, and the system automatically backs up to the slave after the project is downloaded to the master
Disturbance switching, the switching time is < 50ms, and there is no alarm or loss of interruption in the switching process
Economical single-rack hardware
Redundant design
The CPU module that supports redundancy is mounted on a local backplane with dual CPU sockets
After powering on, the redundant CPU module is automatically set to execute user programs synchronously in master, slave mode, and slave, and the host controls the output
When the master fails, the slave automatically switches to the master to ensure the normal operation of the system
Ethernet redundancy
There is a redundant Ethernet interface integrated in the CPU module, which is led out of the backplane, adopts a standard RJ45 interface, conforms to the IEEE802.3/u standard, the communication rate is 10M/100Mbps self-adaptive, and the transmission medium is twisted pair
Bus redundancy
A redundant PROFIBUS-DP bus interface is integrated in the CPU module, which is a communication interface for data exchange between the CPU module and the I/O module from the backplane, realizing bidirectional data transmission between the master and the slave
Redundant PROFIBUS-DP fieldbus in accordance with IEC61158 international standards and EN50170 European standards, with a communication rate of 9.6Kbps - 1.5Mbps optional
Power redundancy
The LK910 power supply can be operated in parallel with two or more redundant configurations, which can realize the non-disturbance switching of power supply to reduce the failure caused by the power supply
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