Description
Key Technical Specifications
| Parameter | Specification |
|---|---|
| Product Model | IS220YAICS1A L |
| GE Catalog Number | IS220YAICS1A |
| Manufacturer | General Electric |
| Product Family | Mark VIeS |
| Product Type | Safety Analog I/O Pack |
| Functional Designation | YAIC |
| Analog Inputs | 10 |
| Analog Outputs | 2 |
| Input Channels 1–8 | 0–20 mA or -10 to +10 VDC |
| Input Channels 9–10 | Current-input channels; range depends on configuration |
| Analog Outputs | 0–20 mA; voltage output capability also documented |
| Transmitter Supply | 24 VDC nominal |
| I/O Pack Supply | 28 VDC nominal, 27.4–28.6 VDC documented |
| Maximum Supply Current | 0.49 A DC |
| Network Interface | Dual Ethernet / IONet |
| Processor Architecture | BPPB-based I/O pack |
| Compatible Terminal Boards | STAI and TBAI families |
| Safety System | Mark VIeS |
| Hazardous Location | Certified configurations exist; certification depends on approved terminal-board combination |
GE’s Mark VIeS documentation identifies IS220YAICS1A specifically as a safety analog I/O pack and lists its approved STAI/TBAI terminal-board combinations. The documented electrical ratings include 27.4–28.6 VDC pack supply, 0–20 mA and ±10 V analog inputs, 0–20 mA analog outputs, and 24 V nominal transmitter power.
Product Introduction
The GE IS220YAICS1A L is a Mark VIeS Safety Analog I/O pack used to acquire and process analog field signals and provide analog outputs within GE turbine and safety-control architectures. The YAIC pack works with dedicated STAI or TBAI terminal boards, allowing field transmitters and analog devices to connect to the Mark VIeS control system. GE documentation confirms support for multiple terminal-board configurations and hazardous-location applications.
This is not simply a conventional analog input card. The IS220YAICS1A belongs to the safety-oriented Mark VIeS I/O architecture, so terminal-board selection, system configuration, I/O pack revision, and safety certification all matter. For a replacement, matching the base model alone is not enough; the existing terminal board and system configuration should be checked before commissioning.
IS220YAICS1A L
Application Scenarios & Field Pitfalls
Engineering Pain Point
Analog signal failures in a turbine safety system can be difficult to isolate because the fault may exist in the transmitter, field cable, terminal board, I/O pack, IONet connection, or configuration.
The IS220YAICS1A sits between the field terminal assembly and the Mark VIeS control network. A loss of several analog values at once should therefore not automatically be interpreted as multiple failed transmitters. Checking I/O pack diagnostics and the associated terminal board can significantly narrow the fault location.
Typical Applications
- Gas turbine safety systems — monitoring pressure, temperature, flow, and other process variables.
- Combined-cycle power plants — analog process measurement within Mark VIeS safety-control architectures.
- Turbine auxiliary systems — acquisition of transmitter signals and delivery of safety-related analog information.
- Industrial process safety applications — where the Mark VIeS platform is used for safety-oriented analog signal processing.
The YAIC architecture supports multiple analog input configurations, including two-wire, three-wire, four-wire, and externally powered transmitters when used with the appropriate terminal-board arrangement.
Technical Pitfalls to Avoid
- Do not substitute it with a standard PAIC analog pack.
The YAIC is specifically part of the Mark VIeS safety I/O architecture. GE documentation separates YAIC safety modules from conventional PAIC analog I/O. - Match the terminal board.
GE lists specific compatible terminal boards, including IS200STAIS1A, IS400STAIS1A, IS200STAIS2A, IS400STAIS2A, IS200TBAIS1C, and IS400TBAIS1C for . - Do not assume every YAIC revision is interchangeable.
GE documentation distinguishes the YAICS1A equipment from later ISx2yYAICS1B configurations. In a TMR application, hardware revision consistency is particularly important. - Check the hazardous-area certification as a complete assembly.
The approved equipment marking depends on the I/O pack and its specified terminal-board combination. Do not transfer a certification assumption from one terminal-board arrangement to another. - Be cautious with channel-count claims online.
Some secondary listings incorrectly describe the YAICS1A with different channel counts or sampling specifications. GE’s documentation identifies 10 analog inputs and 2 analog outputs for the relevant YAIC terminal-board architecture.
Related Products
- IS200STAIS1A — Simplex analog I/O terminal board compatible with the YAIC architecture.
- IS200STAIS2A — alternative STAI terminal-board configuration used with the YAIC I/O pack.
- IS200TBAIS1C — TBAI analog terminal board supporting the YAIC architecture and relevant to TMR/Simplex installations.
- IS400STAIS1A — Mark VIe terminal-board variant compatible with the .
- IS400STAIS2A — another Mark VIe STAI terminal-board configuration for YAIC applications.
- IS400TBAIS1C — Mark VIe TBAI terminal board used with the YAIC I/O pack.
- IS220PAICH1A — conventional Mark VIe analog I/O pack; functionally related but not the same safety-oriented YAIC module.
- IS220PAICH1B — later PAIC configuration; should not be treated as a direct YAICS1A replacement without checking the control architecture.
- ISx2yYAICS1B — later YAIC safety I/O pack family; hardware and installation requirements differ from the .
Procurement check: For , verify the complete nameplate, hardware revision, associated STAI/TBAI terminal board, simplex versus TMR configuration, and applicable hazardous-location requirements. For a safety-system replacement, I would not approve a substitution based solely on the “YAIC” designation. The GE equipment-marking documentation specifically ties the to defined terminal-board combinations.
