Description

GE IS420YDOAS1B Discrete Output I/O Module
GE IS420YDOAS1B is a 12-channel relay output I/O module for the Mark VIe/VIeS turbine control system. It is designed for SIL2/SIL3 safety-level applications and is widely used in power generation, oil and gas, and chemical industries for emergency shutdown and safety interlocks.

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Core parameters
Brand: GE (General Electric)
Model: IS420YDOAS1B
Series: Mark VIe / VIeS (Speedtronic)
Channels: 12-channel Form-C relay outputs (with coil / contact monitoring)
Response time: 6 ms
Communication: Dual Ethernet IONet (RJ45)
Interface: DC37 output terminal board interface
Redundancy: Supports simplex and TMR triple redundancy
Safety level: IEC 61508 SIL2/SIL3
Operating temperature: 0°C ~ +60°C
Size / Weight: Approximately 170×157×153 mm / 1.2 kg
Status indication: Frontal LED (output / fault / ATTN)
Status: Original brand new / refurbished both in stock
Warranty: 12 months
Origin: United States

Key features
Safety-level output: SIL3 certified, relay with feedback monitoring, suitable for ESD and safety interlock.
High-reliability redundancy: Dual network ports + TMR architecture, no single point of failure.
Millisecond response: 6 ms action time, meeting the rapid control requirements of turbines/units.
Industrial-grade robustness: Wide temperature range, anti-vibration, EMI protection, suitable for harsh environments. Typical application
Power generation: Control of gas / steam / wind turbine, start-stop of units and protection.
Oil and gas: Platform ESD, combustion management BMS, valve / pump interlocks.
Chemical industry: Emergency shutdown of reaction vessels, safety interlocks for key equipment.