Description
The GE IS420YAICS1B is a YAIC Analog I/O Pack used with GE Mark VIe and Mark VIeS control systems. It provides the electrical interface between one or two Ethernet networks and a compatible analog I/O terminal board. The module combines a processor board with an analog acquisition board for industrial turbine control applications.
The YAIC supports up to 10 analog inputs and 2 analog outputs. The first eight analog inputs can be configured for ±5 V, ±10 V, or 4–20 mA signals, while inputs 9 and 10 support ±1 mA or 4–20 mA signals. The two analog outputs support 0–20 mA current-loop signals.
🔧 Main Function
The IS420YAICS1B receives analog process signals from the associated terminal board, converts the input signals using a 16-bit A/D converter, and exchanges I/O data with the Mark VIe/Mark VIeS controller through Ethernet.
The module includes diagnostic functions such as power-up self-testing, internal power-supply monitoring, hardware diagnostics, and visual status indication.
🏭 Typical Applications
• Gas turbine control systems
• Steam turbine control systems
• Generator control
• Turbine instrumentation
• Industrial process monitoring
• Mark VIeS functional safety systems
• Analog transmitter interfacing
• Distributed turbine I/O
📋 Product Datasheet
| Parameter | Specification |
|---|---|
| Manufacturer | General Electric |
| Model | IS420YAICS1B |
| Product Type | YAIC Analog I/O Pack |
| Series | Mark VIe / Mark VIeS |
| Analog Inputs | 10 |
| Analog Outputs | 2 |
| Input Resolution | 16-bit ADC |
| AI Channels 1–8 | ±5 V, ±10 V, 0–20 mA |
| AI Channels 9–10 | ±1 mA, 0–20 mA |
| Analog Outputs | 2 × 0–20 mA |
| Ethernet Ports | 2 × RJ45 |
| Control Power | 28 VDC |
| Typical Pack Power | 5.3 W* |
| Firmware | V05.01 or later* |
| ControlST | V06.01 or later* |
| Operating Temperature | -40 to +70°C |
| Dimensions | 3.25 × 1.65 × 4.78 in |
| Weight | Approx. 2 kg shipping weight* |
| Country of Origin | USA* |
*Power-consumption and software-version information can vary with system configuration. GE documentation specifies 28 VDC I/O-pack control power and supports 10 analog inputs plus 2 analog outputs.
⚡ Key Features
• 10-channel analog input capability
• 2-channel analog output capability
• 16-bit analog-to-digital conversion
• Dual Ethernet connectivity
• 28 VDC control power
• Built-in diagnostic monitoring
• Compatible with simplex and TMR configurations
• Designed for Mark VIeS safety applications
🔌 System Integration
The IS420YAICS1B connects to compatible analog terminal boards such as the IS410STAIS2A or IS410TBAIS1C. In a TMR configuration, three YAIC I/O packs are used; simplex configurations use one pack. GE documentation specifies the associated terminal-board arrangement and confirms that the YAIC communicates with the controller through Ethernet.
For current-loop applications, the load terminal resistors are located on the terminal board, while the YAIC measures the resulting voltage signal.
🛠️ Installation Notes
Before installation, verify the complete part number IS420YAICS1B, terminal-board type, hardware revision, firmware compatibility, and Mark VIe/Mark VIeS system configuration.
Check the Ethernet connections, 28 VDC power supply, DC-37 I/O connection, and analog field wiring before energizing the module.
⚙️ Commissioning Checklist
• Verify IS420YAICS1B part number
• Confirm terminal-board compatibility
• Check 28 VDC supply
• Inspect Ethernet connections
• Verify analog input wiring
• Check current-loop polarity
• Verify analog output wiring
• Confirm firmware compatibility
• Check LED diagnostic status
• Verify I/O values in ControlST
⚠️ Compatibility Notice
The GE IS420YAICS1B is a Mark VIe/Mark VIeS analog I/O pack and should be matched with the correct terminal board and system configuration. GE documentation lists the IS420YAICS1B with the IS410STAIS2A and IS410TBAIS1C terminal-board configurations.
For TMR applications, the three I/O packs should use the same hardware form. Do not mix incompatible YAIC revisions on the same terminal board.
📦 Product Identification
Brand: GE
Model: IS420YAICS1B
Series: Mark VIe / Mark VIeS
Product Type: Analog I/O Pack
Function: Analog Input / Analog Output
Channels: 10 AI + 2 AO
Communication: Dual Ethernet
Application: Gas & Steam Turbine Control
