TRICONEX

1.Term Explanation

1. TRICONEX: Brand name (Kangjisen), a Tricon Triple Modular Redundant (TMR) SIS Safety Instrumented System brand under Schneider Electric, designed for ESD emergency shutdown, Fire & Gas, BMS furnace safety interlock control of high-risk industries including oil & gas, chemical and power plants.
2. MP: Abbreviation of Main Processor, the core computing unit of the entire safety system.
3. 3101S2: Complete hardware model. S2 stands for the second-generation revised hardware, upgraded in memory capacity, scan cycle, wide-temperature environmental performance and fault diagnosis accuracy. It is the standard CPU card for medium & small-scale Tricon systems.
4. Triple Redundant Processor Module: Official standard component designation.

Supplementary Core Architecture Note:

Adopts native TMR triple 2-out-of-3 fault-tolerant architecture. Three MP3101S2 modules must operate synchronously in one rack. Three independent computing cores execute identical safety logic in parallel and compare operation results every scan cycle. Failure of any single processor, memory or bus will not trigger spurious trip or fail-to-trip, fully certified TÜV SIL3.

Built-in dedicated TriBus triple safety backplane bus controller to uniformly manage local DI/AI/SDO IO cards, NCM communication modules and SRXM fiber remote extenders.

Equipped with onboard program flash memory and high-speed static SRAM to cache real-time process data, interlock status and millisecond SOE sequence records. Data can be retained for a short period after power loss to support accident traceability audit for safety supervision authorities.

Positioned as a processor dedicated to medium & small-scale units, its computing power and maximum supported IO points are lower than MP3005/MP3006 large processors, suitable for small factories, skid-mounted equipment, skid-mounted LNG and small boiler units with fewer IO points and simple logic.

Supports online rack hot-swap; full safety interlock remains operational during replacement of a single faulty processor without plant shutdown.

2. Core Main Purposes

1. Safety interlock logic calculation (core function) Executes safety programs downloaded via TriStation, including ESD emergency shutdown, Fire & Gas leakage protection, small boiler BMS furnace safety, skid-mounted compressor shutdown protection and skid-mounted LNG overpressure protection. Three processors perform independent synchronous calculations, and hardware 2oo3 voting outputs final trip commands to drive SDO digital output modules for valve cut-off and unit shutdown.
2. Periodic collection and fault diagnosis of full rack IO points Cyclically reads real-time process parameters of local digital input DI and analog input AI, and continuously diagnoses wire breakage, short circuit, load faults and offline cards. It also collects signals from remote explosion-proof IO cabinets through SRXM4210 fiber modules. All faults generate unified alarms and SOE sequence records.
3. Triple TriBus bus synchronization and hardware fault-tolerant voting Three MP3101S2 modules synchronize programs, clocks and process data in real time via triple redundant backplane bus. Operation results of three channels are verified each scan cycle. If a single core, memory or bus communication malfunctions, the other two channels output reliable interlock commands normally to eliminate single-point failure safety risks.
4. Unified system clock to guarantee millisecond SOE timing accuracy Built-in high-precision hardware clock; clocks of three processors are synchronized within milliseconds. Local IO and fiber remote IO share a unified time reference, ensuring zero deviation of timestamps for interlock trips and equipment alarms, complying with safety compliance audit requirements of chemical and power industries.
5. External data interaction coordinated with NCM4329 network communication module Manages NCM communication cards to upload process data, interlock status and SOE events to DCS, HMI and OPC servers, and receives reset and status query commands from upper systems. All communication tasks are processed by independent NCM modules without occupying processor logic scan computing power, stabilizing interlock cycles.
6. Safety program storage, verification and bumpless online modification Non-volatile onboard flash memory solidifies safety logic and automatically verifies program integrity after power-on to prevent program damage or tampering. Supports partial online logic modification and incremental program download via TriStation without plant shutdown, convenient for technical renovation and commissioning of skid-mounted and small-scale units under continuous production.
7. Hot-swap maintenance online to sustain continuous safe production A single faulty MP3101S2 can be hot-swapped directly. The remaining two processors maintain full safety operation, avoiding full-line production halt and economic losses for skid-mounted and small chemical plants.
8. Coordinate remote IO for complete skid-mounted equipment Matched with SRXM fiber optic remote extenders for long-distance IO extension of skid-mounted LNG, skid-mounted compressors and small pipe rack valve groups. Fiber isolation eliminates ground loops and electromagnetic interference, and remote IO retains identical SIL3 safety level as local cabinets.

3. Applicable Application Scenarios

Scenario 1: Medium & small chemical and fine chemical complete skid-mounted units (Core Application)

Small reactor skids, distillation skids and reagent synthesis equipment with fewer IO points and simple interlock logic. MP3101S2 delivers higher cost performance while meeting SIL3 safety interlock requirements.

Scenario 2: Skid-mounted LNG filling stations and small liquefied natural gas plants

Skid-mounted LNG storage tanks and small gasification stations require Fire & Gas and HIPPS overpressure protection with scattered equipment and limited IO points, compatible with compact Tricon racks equipped with MP3101S2 processors.

Scenario 3: Small gas-fired boilers and waste heat power boiler BMS furnace safety systems

Medium & small industrial gas boilers and waste incineration waste heat furnaces use MP3101S2 to realize full furnace safety monitoring functions including ignition and fuel cut-off interlock with small-scale IO points.

Scenario 4: TS3000 protection for medium & small compressors and air separation skids

Auxiliary small air compressors and circulating compressor skids in factories adopt MP3101S2 for anti-surge and unit ESD shutdown protection, matched with compact SIS safety systems.

Scenario 5: Small distribution stations and block valve chambers along long-distance pipelines

Medium & small valve chambers and distribution stations along pipelines only equip a small number of IO points for pressure and leakage monitoring. MP3101S2 main controllers cooperate with SRXM fiber remote IO to reduce project costs.

Scenario 6: Medium & small oil & gas wellheads and small gathering stations

Onshore small oil & gas well sites and simple gathering facilities use MP3101S2 for Fire & Gas monitoring and wellhead emergency block valve interlock, ideal for small-scale installations.

Scenario 7: Overseas export projects of medium & small complete sets of equipment

Export skid-mounted equipment (small chemical skids, LNG skids, boiler units) with international TÜV SIL3 certification and standardized spare parts. Compact size fits small control cabinets and lowers overall equipment export costs.

4. Supplementary Key Hardware & Safety Features

1. Safety Certifications: TÜV Rheinland IEC61508 SIL3, IEC61511 process safety standard, UL & CE industrial explosion-proof certifications;
2. Architecture Spec: Native TMR triple redundant 2-out-of-3 fault tolerance; three modules must run synchronously in one rack;
3. Position Differentiation: Dedicated to medium & small-scale units, lower computing power and maximum supported IO points compared with MP3005/MP3006 large processors;
4. Storage Configuration: Onboard program flash memory + on-chip SRAM for caching real-time data and SOE events, data retained briefly after power loss;
5. Bus Compatibility: Native TriBus triple safety backplane bus, compatible with NCM4329 communication cards, SRXM4210 fiber remote extenders and full series DI/AI/SDO IO cards;
6. Timing Performance: High-precision synchronized hardware clock, zero millisecond offset for SOE event timestamps;
7. Environmental Performance: Second-generation S2 wide-temperature hardware with strong EMI/RFI resistance, adapting to vibration and wide temperature conditions of skid-mounted equipment;
8. Maintenance Advantages: Standard slot for compact Tricon racks, support online hot-swap, online program download and logic modification.

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