The HollySys LK220 modular PLC programmable logic controller system represents a robust automation platform engineered for high-availability process and discrete manufacturing control. Beijing Zhongping Technology provides reliable local distribution and technical support to streamline system integration for industrial enterprises.
Modern industrial automation demands zero downtime, rapid scan cycles, and high data integrity across distributed nodes. The HollySys LK220 modular plc architecture merges standard programmable logic controller openness with advanced distributed control system redundancy. Powered by dual-core processors and comprehensive diagnostic mechanisms, this system handles deterministic control tasks while maintaining deterministic communication across Profibus-DP, Profinet, and Modbus networks.
Technical Specifications
Processor Core Frequency: 667 MHz @ Dual-Core
Bit Instruction Execution Time: 10 ns @ Standard Load
Integer Instruction Execution Time: 10 ns @ Standard Load
Floating-Point Instruction Execution Time: 18 ns @ Standard Load
Integrated Program and Data Memory: 32 MB @ System Baseline
Power-Fail Retentive Data Memory R Zone: 96 KB @ 24 VDC
Power-Fail Retentive Data Memory M Zone: 16 KB @ 24 VDC
Integrated Ethernet Interface: Dual-Port Redundancy @ 10M/100M/1000M
Modbus TCP Maximum Connections: 32 Master and 32 Slave @ Simultaneous Operation
Profibus-DP Master Capacity: 124 Slaves @ Maximum Configuration
Ethernet Free Protocol Connections: 16 Connections @ 8 KB Buffer per Transaction
LK246 Ethernet Communication Module: 2 Modules @ Racks
Input Variable Area I Zone: 64 KB @ Maximum Configuration
Output Variable Area Q Zone: 64 KB @ Maximum Configuration
Global Variable Area N Zone: 4 MB @ Maximum Configuration
Free Variable Area M Zone: 2 MB @ Maximum Configuration
Operating Temperature Range: -20°C - 70°C @ Full Load
Storage Temperature Range: -40°C - 80°C @ Non-Condensing
System Integration and Hardware Setup
Deploying the LK220 modular plc in heavy industrial environments requires proper backplane installation and shielded cabling practices. The controller racks support hot-swappable I/O modules, power supplies, and communication processors, allowing maintenance crews to replace components without powering down the main system. Engineers must mount the dual-rack architecture within grounded steel enclosures, separating high-voltage power lines from low-voltage analog and digital signal cables to eliminate electromagnetic interference.
Shielded twisted-pair cables should terminate at dedicated earth grounding bars using low-impedance connection paths. Dual Ethernet ports and Profibus-DP lines require ring or redundant star topologies to maintain deterministic packet delivery during single-point cable failures. Proper termination resistors on fieldbus lines prevent signal reflections and packet corruption across long-distance industrial networks.
Reliability and Environmental Durability
Industrial facilities expose automation hardware to extreme thermal variations, airborne particulates, and corrosive chemical agents. The LK220 series addresses these challenges through conformal coating applied to all printed circuit boards, protecting circuitry against humidity, salt fog, and mold growth.
Thermal management relies on natural convection cooling, operating reliably within an ambient temperature spectrum from -20°C to 70°C. High-grade industrial semiconductor components ensure high mean time between failures, while redundant power input modules safeguard the central processing unit against sudden grid fluctuations and phase losses.
Selection Guidance and Alternative Options
Selecting the appropriate controller model depends on system scale, I/O point density, and communication protocol requirements. Beijing Zhongping Technology provides expert engineering assistance for cross-reference sizing and system migration strategies.
When evaluating alternatives within the same product family, integrators can consider the LK216 for compact installations requiring 24 MB memory, or scale up to the LK224 for large plants needing 64 MB memory and expanded communication channels. Matching processor capacity to application demands ensures optimal memory allocation and scan cycle performance.
Frequently Asked Questions (FAQ)
1. What is the standard delivery lead time for the HollySys LK220 modular PLC components?
Standard stock items are dispatched within 3 to 5 business days, while customized configuration packages require specific scheduling based on factory inventory.
2. What warranty coverage applies to this programmable logic controller system?
All units supplied by Beijing Zhongping Technology include a comprehensive 12-month technical warranty covering manufacturing defects and hardware malfunctions.
3. Does the LK220 controller support hot-swapping of I/O modules?
Yes, the modular architecture permits live replacement of power supplies, communication cards, and standard I/O modules without interrupting active control loops.
4. What programming software is required for configuring the LK220 system?
The controller utilizes HollySys proprietary engineering software environment, which complies with IEC 61131-3 standards for ladder logic, structured text, and function block programming.
5. How does the dual-rack redundancy mechanism function during a CPU failure?
The secondary standby CPU continuously synchronizes operational data with the primary unit, executing a seamless switchover in milliseconds upon detecting a hardware fault.
6. What is the maximum operating temperature limit for standard installations?
The system operates reliably up to 70°C, provided proper cabinet ventilation and clearance spacing are maintained around each module rack.
7. Are the communication ports isolated against electrical surges?
Yes, integrated Ethernet and serial communication ports feature galvanic isolation to protect internal processing components from field voltage transients.
8. Can the LK220 integrate with third-party supervisory control and data acquisition systems?
Yes, native support for standard industrial protocols such as Modbus TCP and OPC UA allows seamless data exchange with supervisory software platforms.
9. How are retentive data variables preserved during unexpected power losses?
Internal flash memory and battery-backed RAM areas secure critical process variables and system registers without requiring external uninterruptible power supplies.
10. What diagnostic tools are available for troubleshooting network communication errors?
Engineering software diagnostics display live packet statistics, connection statuses, and error logs for Profibus-DP and Ethernet communication channels in real time.
FAQ
1.Who are We?
Beijing Zhongping Technology Co., LTD., is a global industrial electrical automation service provider, is a scientific research, design, marketing, technical services, industrial Internet, international import and export services as one of the science and technology companies.
2.What can you buy from us?
PLC, inverter, human-machine interface, hydraulic products, low-voltage power distribution, industrial robots and core components
3.Is the item in stock or need to be purchased from another supplier?
We have a large inventory of goods and have our own warehouse.
4.What advantages do we have over other suppliers?
Our company has a large amount of inventory and a number of warehouses, but also in the country's important industrial provinces and cities with offices and a number of overseas service points. To provide you with intelligent manufacturing one-stop comprehensive services, save efforts, labor and cost.
5.Can you provide 100% new original authentic products?
We only sell new original genuine, no renovation, no fake, only for the original factory original!
6.How long is the delivery time?
If there is a stock, it will take 2-3 working days to ship, if the quantity is large, it will take 5-7 working days after receiving the payment, if it is not a conventional model, it will take some time, we will inform you of the specific delivery time.
7.Is there technical support available?
Of course, we have a professional technical team that can help you solve technical problems.
8.How do we guarantee quality?
We have three processes to control the quality of goods.
1) Our engineers will inspect the production and quality control in the factory regularly.
2) Incoming materials shall be inspected by experienced purchasing engineers before they can be stored.
3) At least 2 people in the logistics department cross-check the goods to be sent before delivery.
9.Can you guarantee the safe and reliable delivery of your products?
Yes, we strictly adopt the international standard packing. We also use special packaging for dangerous goods, and refrigerated shipping for items with temperature requirements. Special item packaging and general cargo standard packaging requirements may incur additional costs.
10.How about the freight?
The cost depends on how you choose to get the goods. Express is usually the fastest but also the most expensive way. Sea freight is the best solution for large quantities of goods. The exact shipping cost depends on the purchase amount、quantity and weight of your order. Please feel free to contact us for more information.
+86 010-64225983
+8613811814778
Building 26, Liyuan Community, Chaoyang District, Beijing, China
