Mark* VIeS Safety Instrumented Control System | GE Vernova

Product Overview & Series Positioning

The Mark* VIeS is a high-integrity, certified Safety Instrumented System (SIS) designed and manufactured by GE Vernova. It belongs to the industry-proven Mark VIe integrated control platform family, serving as the dedicated safety-focused counterpart to the standard Mark VIe distributed control and turbine control systems. While sharing the same core IONet Ethernet architecture and unified engineering environment as the conventional Mark VIe DCS, the VIeS version is built exclusively for functional safety protection rather than routine process regulation.

Engineered to eliminate operational risks in high-hazard industrial environments, this system complies with strict IEC 61508 and IEC 61511 international functional safety standards, supporting certified Safety Integrity Level 2 (SIL 2) and Safety Integrity Level 3 (SIL 3) safety loops. It maintains physical and logical isolation from non-safety control systems to prevent cross-interference, ensuring independent, reliable, and fail-safe operation for critical plant protection.

 

Product Type & Core Functional Capabilities

 

2.1 Product Functional Type

The Mark VIeS is classified as a modular, fault-tolerant, high-availability safety control system. It features flexible redundant architectures to match different safety grade requirements, including simplex (1oo1) for SIL 2 applications, dual redundant (1oo2) for cost-efficient SIL 3 deployment, and triple modular redundant (TMR 2oo3) for maximum-reliability SIL 3 critical scenarios. Every hardware module and embedded firmware undergoes strict safety certification, equipped with comprehensive self-diagnosis, automatic fault isolation, and bumpless switching functions to eliminate single-point failures and guarantee continuous safe operation.

 

2.2 Core System Functions

Focused entirely on industrial risk mitigation and equipment safety protection, the Mark VIeS undertakes all critical safety monitoring and interlocking tasks for high-risk production facilities. Its core practical functions cover the mainstream safety demands of process and energy industries:

• Emergency Shutdown (ESD): Triggers fast, stable unit or plant-wide shutdown once process parameters exceed safe thresholds, effectively avoiding equipment damage, fire, explosion and personal safety incidents.
• Burner Management System (BMS): Continuously monitors furnace flame status, fuel supply pressure, and ignition sequences, implementing strict interlock logic to prevent furnace deflagration and combustion failures in thermal equipment.
• Fire and Gas (F&G) Monitoring & Protection: Real-time collects signals from flammable gas, toxic gas and fire detectors, executing graded alarm and linkage suppression actions to control hazard spread at the earliest stage.
• Critical Rotating Equipment Protection: Provides professional protection logic for turbines, compressors and high-pressure vessels, including overspeed, over-temperature, over-pressure and anti-surge interlocks to protect core high-value equipment.
• Custom Safety Interlock Control: Configures dedicated interlock logic for on-site pipelines, pumps, valves and auxiliary systems to standardize safe startup, steady operation and normal shutdown procedures.
• High-Precision Diagnosis & Event Recording: Supports full-system real-time self-diagnosis, fault alarm prompt, safety loop status tracking, and Sequence of Events (SOE) recording, facilitating post-fault analysis and daily system maintenance.

 

Industrial Application Scenarios

Thanks to its high safety reliability, harsh environment adaptability and strict international certification, the Mark VIeS is widely applied in high-hazard, high-value industrial scenarios that require 7×24-hour stable operation and standardized safety compliance, mainly covering the following fields:

• Power Generation Industry: Safety protection for gas turbines, steam turbines, combined cycle units, heat recovery steam generators (HRSG), and balance-of-plant (BOP) auxiliary systems. It adapts to traditional thermal power, distributed energy and new low-carbon power facilities.
• Oil & Gas Industry: Safety control for refineries, LNG production and storage plants, offshore drilling platforms, long-distance transmission pipelines and gas compression stations, covering ESD shutdown, F&G monitoring and compressor safety interlocks.
• Chemical & Petrochemical Industry: Critical safety interlock and emergency shutdown protection for chemical reactors, high-pressure reaction devices, and hazardous material storage and transportation systems.
• Other Process Industries: Provides reliable safety control for water treatment systems, pulp and paper production lines, and large industrial mechanical equipment to meet standardized industrial safety specifications.

 

Complete System Composition & Detailed Module Models

The Mark VIeS adopts a modular, Ethernet-distributed architecture. The entire system consists of five core parts: safety controller units, IONet safety network switches, dedicated safety I/O modules, redundant safety power supplies, and professional safety engineering software. All modules are safety-certified, highly compatible and designed for long-term stable operation in harsh industrial conditions. The detailed module models and functions are listed clearly below:

 

4.1 Safety Controller Modules (Core Processing Unit)

As the brain of the safety system, these controllers execute safety logic calculation, signal voting, interlock action output and network data communication, supporting flexible simplex, dual and TMR redundant configurations.

• UCSCS2A: Dedicated SIL 3 safety exclusive controller for Mark VIeS systems. Equipped with a safety-grade dual-core processor and certified safety firmware, it supports 2oo3 TMR voting logic, real-time data synchronization between redundant controllers, and microsecond-level bumpless switching. It is the core controller for high-reliability key safety systems.
• IS420UCSEH2B / IS420UCECH2B: Universal safety controller variants, applicable for 1oo2 dual-redundant SIL 3 and simplex SIL 2 system configurations. Featuring flexible scalability, they are ideal for medium and small-scale safety loop applications with moderate safety requirements.

 

4.2 IONet Safety Network Switch Modules

IONet is the exclusive deterministic industrial Ethernet for Mark VIe and VIeS platforms, ensuring low-latency, zero-loss and high-reliability data transmission between controllers and field I/O modules. All switches are certified for Class 1 Division 2 hazardous areas.

• IS420SW10H1B: 10-port IONet safety Ethernet switch, mainly used for internal network layout of small and medium-sized safety system cabinets.
• IS420SW20H1B: 20-port IONet safety Ethernet switch, supporting large-scale I/O module expansion and multi-cabinet interconnection for complex and large safety systems.

 

4.3 Safety I/O Module Series (SIL 2/3 Certified)

These field-level modules are responsible for on-site safety signal acquisition and protection instruction output, supporting both simplex and TMR redundant configurations, with built-in complete electrical isolation and real-time fault detection functions.

4.3.1 Discrete Input (DI) Modules

• IS420YDIAS1B: 16-channel safety discrete input module, supporting 24 Vdc, 48 Vdc and 125 Vdc field signal acquisition. It adopts 1500 V optical isolation design to resist strong industrial electromagnetic interference.
• SDIIH2A: Supporting simplex discrete input terminal board, matched with IS420YDIAS1B for field signal wiring, isolation and signal conditioning.

4.3.2 Analog Input/Output (AI/AO) Modules

• TBAIS1C: High-precision SIL 3-certified integrated analog input and output module. It collects analog safety signals such as temperature, pressure and flow rate, and outputs analog control commands for safety auxiliary equipment.
• STAIS2A: Simplex analog signal terminal board, ensuring stable and reliable connection and signal transmission for on-site analog sensors.

4.3.3 Discrete Output (DO) Modules

• IS400REPIH2A: Safety relay interface module with safety-rated contact output, specially used for critical trip circuit control of turbines, compressors and other core equipment.
• PDIIH1B: High-speed safety discrete output module, designed for fast-response safety interlock and emergency trip scenarios that require high real-time performance.

 

4.4 Safety Power Supply Module

• IS420PWRH1B: Dedicated redundant safety power supply module, supporting 24 Vdc and 48 Vdc stable output. It integrates over-voltage, over-current and short-circuit protection functions, and supports parallel redundant power supply configuration to achieve uninterrupted power supply for the entire safety system.

 

4.5 System Software Platform

The Mark VIeS system adopts GE Vernova’s unified ControlST Suite as the core engineering and operation software platform, realizing one-stop system configuration, programming, debugging and real-time monitoring:

• ToolboxST: Professional safety engineering software, supporting standard IEC 61131-3 programming languages, safety logic configuration, SIF safety loop verification, and full-range system fault diagnosis.
• WorkstationST: Human-machine monitoring software, providing real-time safety data display, intelligent alarm management, event sequence recording and historical data query functions.

 

Key Technical Advantages

• Full Standard Compliance: Complete system-level IEC 61508 SIL 2/SIL 3 certification, fully compliant with ISA 84 and IEC 61511 process safety standards, meeting international project safety acceptance requirements.
• Flexible Redundancy Design: Optional simplex, dual and TMR three architectures, flexibly balancing safety level and project cost to cover all mainstream industrial safety application demands.
• Deterministic Safety Network: Exclusive IONet Ethernet ensures fixed communication delay and zero data loss, guaranteeing real-time and accuracy of safety signal transmission and protection action execution.
• Superior Harsh Environment Adaptability: Supports operating temperature from -40°C to +70°C, with G3 anti-corrosion capability and Class 1 Division 2 hazardous area certification, adapting to complex and harsh industrial sites.
• Isolated and Integrated Design: Seamlessly integrates with standard Mark VIe DCS for unified engineering and monitoring, while maintaining independent safety jurisdiction to avoid safety risks caused by non-safety system interference.
• Full Lifecycle Intelligent Diagnosis: Real-time self-diagnosis for controllers, network links and all I/O modules, realizing pre-fault warning and rapid fault location, effectively reducing maintenance downtime.

 

System Summary

The Mark* VIeS is a mature, reliable modular SIS under GE Vernova’s Mark VIe control ecosystem. As a dedicated SIL 2/SIL 3 safety protection system, it focuses on ESD emergency shutdown, BMS furnace safety, F&G hazard monitoring and critical equipment interlock protection for energy, petrochemical and process industries. The whole system is composed of dedicated safety controllers, IONet safety switches, full-series safety I/O modules, redundant safety power supplies and professional ControlST software platform. With flexible redundant architecture, deterministic safety network transmission, authoritative safety certification and strong environmental adaptability, it provides stable, compliant and low-maintenance safety guarantees for high-risk industrial facilities, and supports the safe and efficient operation and intelligent upgrading of modern industrial control systems.