GE IS420YDOAS1B Discrete Output I/O Pack

GE IS420YDOAS1B is a discrete relay output I/O pack developed for the GE Mark VIe and Mark VIeS Speedtronic turbine control system. It receives control commands from the main controller and drives field relays, solenoid valves and safety trip devices.

Equipped with 12 relay output channels and built-in circuit diagnostic function, this module supports simplex and TMR triple redundant configurations. It communicates via dual redundant IONet Ethernet ports and is widely used as spare parts for power plant gas and steam turbine control systems.

Main Specifications

• Brand: GE
• Model: IS420YDOAS1B
• Product Type: Mark VIe Discrete Relay Output I/O Pack
• Channel: 12-channel relay discrete outputs with feedback monitoring
• Communication: Dual redundant 10/100Mbps IONet Ethernet
• Supported Architecture: Simplex / TMR triple modular redundancy
• Compatible Software: ControlST V06.01 and above
• Front panel LED indicators for channel status and fault diagnosis
• Conformal coated PCB for anti-humidity and anti-corrosion
• Operating Temperature Range: -40°C ~ +70°C

Core Functions

• Execute safety control commands to drive field solenoid valves, trip relays and auxiliary equipment
• Monitor relay channel status and detect wiring open-circuit and short-circuit faults automatically
• Realize high-speed real-time data interaction with turbine controller through redundant IONet network
• Support flexible simplex or TMR redundant layout to meet safety protection requirements
• Support parameter configuration, online testing and fault diagnosis via ControlST software
• Hardware isolation design prevents field surge interference from damaging main control hardware
• Modular plug-in structure facilitates quick disassembly and spare parts replacement during overhaul
• Cooperate with matched terminal boards to complete all discrete control loop wiring
• Conformal coating ensures stable long-term operation in harsh power plant cabinet environment
• Guarantee reliable execution of turbine emergency shutdown and safety interlock logic

Application Scenarios

• Thermal power plant GE Mark VIe gas turbine control racks
• Steam turbine safety trip and auxiliary interlock control systems
• Combined cycle power generation unit automation control cabinets
• Oil & gas industry large compressor and turbine control equipment
• Biomass and waste-to-energy power generation unit control systems
• Industrial power plant auxiliary machinery safety control racks
• LNG facility turbine monitoring and safety interlock cabinets
• Energy storage power station turbine protection automation equipment
• Overhaul, retrofit and spare parts replacement of Mark VIe control systems
• GE turbine discrete output module spare parts inventory and field service projects