IS220YAICS1A GE Mark VIe

The IS220YAICS1A serves as the electrical interface between the I/O Ethernet network and the analog terminal board, performing bidirectional conversion of signals from field sensors and control system commands. Designed specifically for industrial automation applications requiring high-integrity analog signal processing and Safety Integrity Level (SIL) certification, it is widely used in safety-critical fields such as gas turbines, steam turbines, oil and gas, and process industries.

This module is installed on a compatible analog terminal board (such as the TBAIH1C or STAI series). It digitizes analog signals from field transmitters and transmits them to the controller, while simultaneously converting digital control commands into analog output currents to drive field actuators.

The module employs a dual-core architecture—consisting of a general-purpose processor board and a dedicated acquisition board. Input signals first pass through a passive low-pass filter with a cutoff frequency of 75.15 Hz to reduce noise, and are then digitized with high precision via a 16-bit analog-to-digital converter (ADC) combined with an analog multiplexer and multi-stage gain/scaling selection circuits.

• SIL 3 Safety Certification: Passed exida's IEC 61508 assessment, achieving SIL 3 in an HFT=1 (triple redundancy) configuration.
• High-Precision Signal Processing: Equipped with a 16-bit ADC input converter and a 14-bit output converter, with input accuracy of ±0.1% of full scale.
• Flexible Multi-Channel Configuration: Supports 10 analog inputs (±5 V, ±10 V, 4-20 mA) and 2 analog outputs (0-20 mA); the first 8 inputs can be flexibly configured for ±5 V or ±10 V voltage input modes.
• Redundant Architecture Support: Supports simplex and TMR triple-redundant configurations with automatic failover in the event of a failure.
• Hot-swap Capability: Supports hot-swapping while the system is powered on; module replacement does not require shutting down the system power.
• Operating Temperature Range: -40°C to +70°C.
• Signal Isolation Voltage: ≥2500 V AC.
• Surge Immunity: ±2 kV, suitable for extreme industrial environments.

For new Mark VIeS safety control system projects, we recommend the following configuration:

This configuration has been validated in multiple large-scale gas turbine combined-cycle power plant projects, with system reliability and safety meeting design requirements.