- Model: IS220YAICS1A
- Manufacturer: GE
- Core Function: Provides safety-rated analog input and output processing with isolation and diagnostics for precise signal acquisition and control in functional safety applications, interfacing field signals to the controller via IONet.
- System Compatibility: Compatible with GE Mark VIe and Mark VIeS distributed control systems, specifically designed for SIL-capable (Safety Integrity Level) configurations in Speedtronic turbine platforms.
- Supply Status: Available as new surplus, refurbished, or repair/exchange; supported for ongoing lifecycle in safety-critical installations.
- Warranty Standard: 12-month functional warranty, fully tested.
Key Technical Specifications
- Product Model: IS220YAICS1A
- Manufacturer: GE
- System Platform: Mark VIeS
- Power Supply Voltage: 24 V DC nominal (supplied via terminal board), operational range typically 18-32 V DC for reliable analog front-end performance.
- Power Consumption: Approximately 8-12 W, optimized for low heat dissipation in safety-rated control cabinets.
- Communication Interfaces: Dual 100 Mbps Ethernet ports for redundant IONet connectivity to Mark VIeS controllers.
- Analog Inputs: Up to 8 isolated channels (configurable for current/voltage), supporting 4-20 mA (passive/active) and 0-10 V signals with built-in signal conditioning.
- Analog Outputs: Configurable channels for precise setpoint transmission, often paired in safety loops.
- Resolution: 12-bit to 16-bit A/D and D/A conversion, ensuring high accuracy for safety-critical measurements.
- Input/Output Range: 4-20 mA current loops (with external power) or 0-10 V voltage, with overrange protection.
- Isolation: Galvanic isolation per channel, critical for noise rejection and safety integrity in hazardous environments.
- Operating Temperature Range: -40°C to +70°C (extended for some certifications), suited for turbine hall and hazardous area deployment.
- Humidity Tolerance: 5% to 95% non-condensing, maintaining signal integrity in varying conditions.
- Dimensions: Standard Mark VIe pack size approximately 8-10 cm wide x 4-5 cm high, mounted directly on compatible terminal boards (e.g., STAIS series).
- Weight: Approximately 0.8-1.0 kg, facilitating safe handling in industrial settings.
- Mean Time Between Failures (MTBF): >150,000 hours (typical for Mark VIeS safety I/O), supporting high SIL availability requirements.
- Certification Standards: CE compliant, UL 508 listed, ATEX/IECEx certified for hazardous locations (when paired with approved terminal boards), RoHS, and designed for SIL 3 capability per IEC 61508.
Technical Architecture & Functional Positioning
The IS220YAICS1A operates as a safety-certified analog I/O pack in the Mark VIeS architecture, positioned at the field interface layer connected to dedicated terminal boards (such as IS200STAIS1A or IS400STAIS series). It performs local signal conditioning, isolation, A/D conversion, diagnostics, and redundant IONet communication to deliver high-integrity analog data to the controller. This distributed safety design minimizes single-point failures and supports voted logic in TMR configurations, essential for functional safety applications.
The pack integrates isolated analog front-ends, precision references, and onboard diagnostics for channel health, open/short detection, and out-of-range conditions. Dual Ethernet interfaces ensure fault-tolerant paths, while SIL-rated firmware enables compliance with safety loop requirements. These features solve critical challenges: maintaining signal accuracy and isolation in noisy turbine environments, preventing common-mode failures in safety instrumented systems, and enabling rapid fault detection for reduced spurious trips or dangerous undetected failures.
In Mark VIeS setups, the module supports IEC 61508 SIL 3 loops when properly configured, providing verifiable safety integrity for turbine protection, emergency shutdown, and process safeguarding.
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