The GE IS420YDOAS1B, also cataloged as the IS420YDOAS1B Discrete Output Module, serves as a hardware I/O pack for turbine control systems within the Mark VIe Speedtronic series, providing monitored relay outputs and deterministic signal execution.
Hardware Specifications
Parameter
Specification
Model
IS420YDOAS1B
Brand
General Electric
Origin
Not specified
Weight
Not specified
Dimensions
H 3.25 in × W 1.65 in × D 4.78 in
Operating Temp
-40 to 158 °F
Power Consumption
Not specified
Product Type
Discrete Output Module
Series
Mark VIe
Technology
Surface-mount
Relay/Coil Monitoring
12 relay/coil monitors
Redundancy Compatibility
Simplex or TMR
Processor Board
BPPC
I/O Pack Response Time
6 ms
Functional Abbreviation
YDOA
Firmware Flash Compatibility
The IS420YDOAS1B supports firmware flash compatibility with BPPC processor boards, ensuring synchronized updates across simplex and TMR configurations. This design allows seamless integration into Mark VIe architectures, maintaining deterministic output timing and redundancy alignment.
Frequently Asked Questions (FAQ)
Q: Can the IS420YDOAS1B operate in both simplex and TMR modes? A: Yes, the module is compatible with simplex and triple modular redundancy configurations.
Q: What is the typical I/O pack response time? A: The module provides a 6 ms response time for discrete output execution.
Q: How are relay and coil states monitored? A: The module includes 12 relay/coil monitors for hardware-level state validation.
Field Installation Guidelines
Mount the IS420YDOAS1B securely within the Mark VIe chassis, ensuring proper connector engagement.
Maintain separation between signal cabling and high-voltage wiring to minimize interference.
Apply shielded cabling with correct grounding to preserve output signal integrity.
Verify redundancy jumper settings during commissioning to confirm simplex or TMR operation.
Conduct functional checks of relay monitoring before system activation.
