Description

GE IS420YDOAS1B Discrete Output I/O Pack Product Description

Technical Specifications

• Product Model: IS420YDOAS1B
• Brand: GE Gas Power Mark VIe / Mark VIeS Speedtronic Turbine Control System
• Warranty: One Year
• Input Voltage: 24 V DC auxiliary power via 3-pin dedicated power connector
• Operating Temperature: -40°C to 70°C (-40°F to 158°F)
• Storage Temperature: -40°C to 85°C (-40°F to 185°F)
• Response Time: 6ms fixed fast relay switching and feedback signal loop response
• Protection Class: IP20 industrial metal housing, EMI/EMC shielding, surge suppression and contact overcurrent protection
• Accuracy Class: Independent coil feedback monitoring for each channel, zero misoperation in TMR triple modular redundant mode
• Output Frequency: Matches Mark VIe system IONet bus periodic scanning frequency
• Rated Current Range: Each Form-C relay contact rated 3A @ 250VAC load capacity
• Communication Interface: Dual redundant 10/100Mbps IONet Ethernet RJ45 ports, DC37-pin terminal board output socket
• Supported Protocols: GE IONet internal bus protocol, compatible with ControlST V06.01 and above configuration software
• Overload Capacity: Per-channel short-circuit lockout, relay coil fault detection, module watchdog self-diagnosis and fault alarm output
• Dimensions: Compact DIN rail mount module: 82.5mm(H) × 41.9mm(W) × 121.6mm(D)
• 

Product Overview

The IS420YDOAS1B is a critical discrete relay output I/O pack exclusively designed for GE Mark VIe and Mark VIeS high-reliability turbine safety control systems, widely deployed on gas turbines, steam turbines and heavy-duty generator protection units in power plants. It is equipped with 12 independent Form-C electromagnetic relay output channels, each built-in real-time coil energization feedback function to verify actual on-site execution status of control commands, effectively avoid hidden failures of relay contacts or external wiring. The dual redundant IONet Ethernet architecture supports simplex standalone operation and TMR triple modular redundant fault-tolerant configuration, achieving seamless system switching without tripping during single network or module anomaly. With wide extreme temperature resistance, robust anti-vibration and electromagnetic interference performance, it stably runs in high-temperature, dusty and vibration-intensive turbine hall environments. Front panel LED indicators display individual channel working status and module fault codes for rapid on-site troubleshooting. It serves as the final execution unit for safety interlock, valve driving, breaker tripping and auxiliary equipment logic control, delivering ultra-high safety and availability for large-scale power generation critical control systems.