HollySys LXS SIL3 Safety PLC with SCADA HMI Support

The HollySys LXS SIL3 Safety PLC delivers robust functional safety compliance with TÜV Rheinland certifications up to SIL3 and PLe, ensuring ultra-fast safety loop response times under 20 ms. Engineered for complex machinery automation, this platform features flexible mixed mounting of safety and standard modules backed by dedicated regional inventory support from Beijing Zhongping Technology.

Industrial automation environments demand uncompromising functional safety alongside high-speed data processing to mitigate catastrophic machinery hazards and unexpected downtime. Traditional safety relays often introduce complex wiring architectures and limited diagnostic visibility, constraining scalability in compact machine cells. The LXS safety architecture addresses these constraints by leveraging advanced 1oo2 internal diagnostics and a deterministic control cycle ranging from 1 ms to 1000 ms with minimal jitter. Integrated within the FA AutoThink-Safety configuration suite, it provides a diverse library of native safety algorithm blocks designed to implement intricate safety interlocks without compromising machine throughput. Its native support for FSoE (FailSafe over EtherCAT) protocol guarantees deterministic, low-latency safety data transmission across distributed nodes, ensuring real-time reaction mechanisms in high-risk automated cells.

Technical Specifications

Safety Integrity Level: SIL 3 @ IEC 61508

Performance Level: PL e @ ISO 13849-1

Safety Category: Cat. 4 @ ISO 13849-1

System Scale: Max 128 Safety IO Modules @ LX-LG901 Logic Module

Control Cycle: 1 - 1000 ms @ Configurable Step 1 ms

Typical Power Consumption: 1.2 W @ 24 VDC

Insulation Resistance: >= 10 MΩ @ DC 500V

Power-Up Reset Time: <= 10 s @ Cold Reset

Module Dimensions: 12 mm x 100 mm x 68 mm @ W x H x D

Enclosure Protection Rating: IP20 @ IEC 60529

Operating Temperature: -20°C - 60°C @ Standard Operation

Weight: <= 60 g @ Without Packaging

System Integration and Hardware Setup

Deploying the LXS safety system requires meticulous adherence to physical and electrical installation standards to maintain loop integrity. The LX-LG901 logic module mounts directly onto standard DIN35 rails, utilizing the rail itself as an integrated functional earth connection for electromagnetic shielding. When wiring distributed safety nodes, shielded twisted-pair cables must be used for EtherCAT and FSoE networks to suppress high-frequency industrial noise and prevent common-mode interference. Grounding shields should be clamped securely to low-impedance panel bars using EMC metal bracket clips to eliminate ground loops. Field power distribution must isolate safety circuits from standard industrial loads, ensuring that voltage drops remain within acceptable thresholds during maximum concurrent switching of safety actuators.

Reliability and Environmental Durability

The LXS series is engineered for harsh industrial ecosystems, featuring a compact IP20 modular housing designed to withstand severe mechanical vibration and thermal stress. The internal architecture utilizes conformal-coated printed circuit boards to resist corrosive atmospheric elements, conductive dust, and high relative humidity conditions up to 95% non-condensing. Diagnostic reliability is enhanced through continuous internal monitoring of CPU junction temperatures, EtherCAT packet drop rates, and individual FSoE channel statuses. This proactive monitoring layer feeds precise diagnostic flags back to the SCADA HMI environment, allowing maintenance personnel to isolate faulty channels or communication anomalies instantly before triggering safety stop routines.

Selection Guidance and Alternative Options

Selecting the appropriate LXS safety configuration depends heavily on the total number of safety I/O nodes, response time requirements, and network topology constraints within your machinery layout. Beijing Zhongping Technology maintains a comprehensive inventory of LXS logic modules, safety digital inputs, and FSoE expansion blocks to streamline your bill of materials fulfillment. For engineers upgrading legacy safety architectures, our technical application team provides professional cross-reference selection support, ensuring seamless physical integration with existing SCADA HMI platforms and standard PLC networks.

Frequently Asked Questions (FAQ)

1. What is the standard delivery lead time for the HollySys LXS safety PLC components from regional stock?

Standard stock items maintained by Beijing Zhongping Technology typically ship within 24 to 48 hours of order confirmation, dependent on destination logistics and configuration complexity.

2. What warranty terms and after-sales support apply to purchased LXS safety hardware?

All supplied units include a comprehensive 12-month industrial replacement warranty, backed by direct engineering support and pre-shipment quality verification protocols.

3. Can the LXS safety modules be installed alongside standard automation modules on the same backplane?

Yes, the system natively supports mixed installation configurations, allowing safety and standard I/O modules to coexist on the same rack infrastructure.

4. What programming software is required to configure the safety logic and parameters?

Configuration, hardware setup, and safety logic programming are executed using the dedicated FA AutoThink-Safety engineering software platform.

5. How is safety communication established between distributed nodes in the network?

Safety communication utilizes the standardized FSoE (FailSafe over EtherCAT) protocol, maintaining deterministic and secure data transmission across the network topology.

6. What is the maximum allowable control cycle setting for the LX-LG901 logic module?

The control cycle is adjustable from 1 ms up to 1000 ms, with a default adaptive setting maintaining jitter performance within a 10% threshold.

7. Does the system support hot-swapping of safety I/O modules during active machine operation?

Hot-swapping is restricted during active safety execution to prevent unexpected fault trips; power must be cycled or safety loops disabled following maintenance procedures.

8. What safety certifications have been officially granted to the LXS series PLC?

The system has achieved comprehensive functional safety certification through TÜV Rheinland, confirming compliance with ISO 13849, IEC 61508, and IEC 62061 standards up to SIL3 and PLe.