SIS100 Safety Instrumented System
The SIS100 Safety Instrumented System is designed for high safety and high availability scenarios, applied to safety interlocks, safety protection, unit control in the process industry. It complies with the requirements of IEC 61508 and GB/T 20438 standards, and passed the SIL 2 / SIL 3 functional safety certification by a third-party certification body. The overall system structure adopts a triple modular redundancy (TMR, oo3) structure and is fail-safe. It features online fault diagnosis, alarms, automatic switching, and maintenance prompts.
Technical data
| Safety Integrity Level (SIL) : | SIL3&SC3 | System Architecture: | 2oo3D |
| Degraded Mode: | 3-2-1-0 | Bumpless download: | Supported |
| Multi-tasking | Supported | SOE Function and Resolution: | DI and AI support hardware-based SOE with a resolution of 1ms. |
| System Scale: | 3776 Points | Maximum number of control stations supported by the system: | 64 |
| Maximum number of host computers supported by a single control station: | 16 | Maximum number of I/O modules supported by a single control station: | 118 pairs in total.8 pairs for the Main Control Chassis and 10 pairs for I/O Expansion Chassis. |
| Maximum number of expansion chassis supported: | 11 | Remote I/O: | Supports remote I/O up to a distance of 20 km. |
| Corrosive Environment: | G3 Level as defined in ANSI/ISA S71.04-2013 | Hazardous Area: | EN 60079-0:2012/A11:2013 EN 60079-15:2010 ATEX: II 3G Ex nA nC IIC T4 Gc |
Features & Benefits
Robust security architecture
TMR Triple Modular Redundant (2oo3) Fail-Safe Architecture, supporting 3-2-1-0 Degradation Mode.
SIL Certification
SIL3 Safety Integrity Level Certification, compliant with GB/T 20438 (IEC 61508) Functional Safety Standard.
Hardware SOE supported
Equipped with hardware-based SOE (Sequence of Events) recording function, with an SOE resolution of up to 1ms.
Remote I/O
Supports remote I/O up to a distance of 20 km.
Designed for harsh industrial environments
Meets G3 corrosion protection level, with an operating temperature range of -10°C to 60°C, suitable for harsh industrial conditions.
Applications
Widely used in high-risk process industries such as oil and gas, petrochemicals, chemical engineering, electric power, and pharmaceuticals.
Case Studies
Natural Gas Well
PAS300 is used to build a BPCS that collects gas well parameters such as pressure, temperature, and flow rate, enabling production control and providing remote control interfaces for equipment to support continuous and stable gas well production. SIS100 serves as the SIS to monitor safety parameters and manage safety equipment according to emergency shutdown logic, helping safeguard gas well operation safety.
Port LNG
By integrating DCS, PLC, SIS, digital monitoring screens, CCTV industrial television, and online/offline process analysis systems, it achieves continuous automated control of the entire LNG unloading, storage, boosting, and regasification process. The terminal requires only 6 on-site operators, reaching an internationally advanced level of LNG automation.
Coke Oven Gas to LNG
LNG production faces challenges such as difficult methanation control, high energy consumption in cryogenic liquefaction, and significant safety risks. Chuanyi has built an integrated automation solution covering sensing, control, and actuation. Leveraging high-accuracy instruments, DCS and SIS systems, and high-performance actuators, it achieves fully automatic control of each process, balancing safe and efficient operation while improving economic and environmental benefits.