GE IS220YDOAS1AJ Gas Turbine Safety Digital Output Module
I. Product Brief Description
GE Mark VIe / Mark VIeS (Speedtronic) is a dedicated control system for gas turbines and steam turbines, belonging to a safety-type discrete relay output I/O module (Safety Discrete Output Pack); AJ represents the fully revised hardware firmware version, equipped with a triple redundant safety architecture, responsible for the trip circuit of the unit, solenoid valves, start-stop auxiliary machines, and switch quantity drive output of the alarm circuit. It is the core card of the safety interlock system of the power station turbine control system.
Key Technical Parameters Table
Parameter Item Technical Indicator
Number of Output Channels 12 channels of safe passive relay switch quantity output
Single-channel Contact Capacity 250VAC 5A / 30VDC 5A
Signal Response Time ≤ 6ms
Power Supply DC 18~36V (standard 24VDC cabinet power supply), total system power consumption 12W
Communication Ports Dual independent RJ45 Ethernet (ENET1/ENET2), dual network redundant links
Back-end Wiring Interface DC37-pin aviation connector, connected to matching terminal base
Local Status Indicators Multiple groups of LED indicators: power, communication, channel failure, output status, alarm
Safety Architecture Supports TMR triple module redundancy (three-out-of-two voting), SIL2 safety level certification
Event Recording Integrated SOE event sequence recording, capturing fault actions at millisecond level timing
Operating Environment Temperature 0℃ ~ +65℃; Storage Temperature: -40℃~+85℃
Protection Grade IP20 (internal rail plug-in installation of control cabinet)
Dimensions 104mm×117mm×36mm
Net Weight of the Whole Machine Approximately 0.8kg
Compliance Certifications CE, UL, CSA, NFPA Class1 industrial explosion-proof specifications
Operating System QNX embedded real-time operating system
Core Product Performance
Safety Interlock Drive Core
Specially outputs critical safety circuits such as protection trip, emergency shutdown, fuel valve cut-off, lubricating oil pump start-stop, exhaust fan damper, etc., with relay circuits including open circuit and coil self-check to prevent false actions due to contact sticking;
Triple Redundant Fault-Tolerant Operation
Three modules are connected in parallel for triple-out-of-two logic voting; single module hardware damage or communication interruption will not cause the unit to trip incorrectly; the main control of thermal power / gas power plants is标配 redundant solutions；
Dual Ethernet Redundant Communication
Two independent links of Ethernet connect the controller， any single network cable failure will automatically switch seamlessly， and data transmission will not be interrupted；
Full Channel Hardware Self-Diagnosis
Power-on self-check， operation cycle inspection， can detect short circuits， open circuits， loose terminals in output circuits， and upload fault codes to the upper-level monitoring system；
Hot Swap Replaceable
The system can be replaced and inserted without stopping operation， and the unit’s operation and maintenance can be carried out without stopping；
Firmware Version Compatibility
IS220YDOAS1AJ is downward compatible with IS220YDOAS1A basic version； the hardware structure， hole layout， and wiring are completely consistent， and it can be directly replaced and upgraded.
Application Domains
Main control safety interlock system for heavy-duty gas turbine combined cycle power plants；
Switch quantity output control for steam turbine generator sets’ speed regulation and protection；
Industrial turbine unit safety shutdown circuits control for refineries， oil and gas self-owned power plants；
Logic drive for turbine unit start-stop logic in cogeneration and distributed energy stations；
Safety protection system for auxiliary steam turbine units of nuclear power plants and emergency diesel generator sets.
Main I/O Module Models of the Mark VIe Series
Digital Output Type
IS220YDOAS1A： Basic standard version of safety discrete output module (previous-generation basic firmware)
IS220YDOAS1AJ： Optimized firmware version (this model， enhanced stability and diagnostic functions)
Matching Input / Mixed I/O Cards
IS220YDIAS1A： 16-channel digital switch quantity safety input module
IS220YAOES1A： 4-20mA analog output module (speed servo valve drive)
IS220YAIAS1A： Multi-channel analog quantity acquisition input module (temperature， pressure， speed signal acquisition)
IS220PPROS1B： Mark VIe system main control processor module (core CPU of the entire system)
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