The HollySys LK220S programmable logic controllers deliver certified SIL2 functional safety and dual-chassis redundancy for critical industrial automation processes. Featuring robust fault tolerance and native compliance with IEC61508 standards, this plc cabinet solution ensures maximum availability in hazardous operating environments.
The LKS safety programmable logic controllers platform addresses the severe industrial challenge of single-point system failures in high-risk continuous processes such as petrochemical refining, power generation, and gas distribution. Operating on a dual-core 667 MHz processing architecture, the LK220S main control module executes complex safety logic while maintaining deterministic scan cycles. Communication buses and power supply loops utilize fully redundant topologies to prevent packet loss, data latency, and unexpected controller halts. System configuration relies on the Safety FA-AutoThink software environment, complying strictly with IEC61131-3 standards to support Ladder Diagram and Function Block Diagram programming with advanced de-compilation verification.
Technical Specifications
CPU Dominant Frequency: Dual-core, 667 MHz @ 24 VDC
Instruction Execution Rate Bit Operations: 20 ns @ Standard Load
Instruction Execution Rate Fixed-Point: 20 ns @ Standard Load
Instruction Execution Rate Floating-Point: 28 ns @ Standard Load
Program Storage Capacity: 32 MB (16 MB for system, 16 MB for user logic) @ 25°C
Power-Loss Retentive Memory MRAM: 512 KB @ 24 VDC
Ethernet Communication Ports: 2-port 10/100M @ Modbus TCP Protocol
Module Protection Rating: IP20 @ Standard Cabinet Installation
Single System I/O Capacity: 1,000 points @ Maximum Configuration
Input Variable Area I Zone: 128 KB @ System Memory
Output Variable Area Q Zone: 128 KB @ System Memory
General Variable Area G Zone: 1 MB @ System Memory
User Parameter Variable Area M Zone: 1 MB @ System Memory
Retentive Area R Zone: 64 KB @ MRAM Allocation
Redundancy Support: Dual-backplate hot-standby redundancy @ Rack Level
Module Physical Dimensions: 44.7 mm x 166 mm x 152 mm @ W x H x D
System Integration and Hardware Setup
Deploying the LK220S safety controller within an industrial plc cabinet requires rigid adherence to EMC shielding and grounding protocols. All communication lines must utilize shielded twisted pair cables terminated to a low-impedance ground bar to eliminate common-mode electromagnetic interference from nearby variable frequency drives. The dual 10/100M Ethernet interfaces support ring and star topologies, requiring high-grade industrial patch cables with robust connector locking mechanisms. Backplate installation involves slot-based alignment where safety and non-safety I/O modules can be integrated adjacently without signal degradation. Hot-swapping operations must be executed sequentially while maintaining proper backplate bus communication integrity to prevent fault-state trips during runtime maintenance.
Reliability and Environmental Durability
Engineered for continuous operation in harsh industrial plants, the LK220S module incorporates conformal protective coating across internal printed circuit boards to resist corrosive gases and high humidity levels. The hardware design features high-efficiency thermal dissipation pathways, allowing reliable operation across wide ambient temperature ranges without forced mechanical ventilation. Dual-chassis redundancy combined with over 90% diagnostic coverage delivers a 100,000-hour mean time between failures metric. The non-volatile MRAM architecture maintains retentive data integrity without relying on maintenance-intensive internal backup batteries, lowering long-term operational downtime risks in remote installations.
Selection Guidance and Alternative Options
When specifying safety architectures for high-consequence industrial loops, engineers must evaluate input-output density, scan time performance, and redundancy tiers between the LK220S safety controllers and standard large-scale process controllers like the LK500 series. For operations requiring seamless cross-referencing, legacy migration, or immediate component acquisition, Beijing Zhongping Technology provides comprehensive engineering consultation, cross-reference part matching, and original factory-backed hardware inventory to support urgent deployment schedules.
Frequently Asked Questions (FAQ)
1. What is the primary safety certification associated with the LK220S controller?
The unit is certified by TÜV SÜD for SIL2 compliance under IEC61508, IEC61511, EN50126, EN50129, and EN 54-2 standards.
2. Does Beijing Zhongping Technology provide local inventory and pre-shipment testing for this model?
Yes, Beijing Zhongping Technology maintains regional factory-original stock and conducts strict quality inspections prior to dispatch.
3. What programming languages does the Safety FA-AutoThink software support?
It supports Ladder Diagram and Function Block Diagram programming conforming strictly to the IEC61131-3 standard.
4. How does the module handle program storage and memory allocation?
It features 32 MB of total program storage, split evenly with 16 MB allocated for system operations and 16 MB dedicated to user application logic.
5. Is hot-swapping supported for input and output modules on the rack?
Yes, the system architecture fully supports hot-swapping of modules to ensure uninterrupted maintenance continuity.
6. What communication protocols are supported on the onboard Ethernet ports?
The dual 10/100M Ethernet ports natively support the Modbus TCP protocol for robust data exchange.
7. What is the execution speed for floating-point instructions on this CPU?
The floating-point instruction execution speed is rated at 28 ns under standard operating conditions.
8. What physical enclosure rating do these controller modules possess?
The individual modules carry an IP20 protection rating and are designed for installation inside sealed industrial control cabinets.
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
