Description
Product Description
The IS420YAICS1B Analog I/O Pack is a GE Mark VIe and Mark VIeS control system component designed to interface analog field signals with the control system through an associated analog I/O terminal board. The YAIC pack supports up to 10 analog inputs and 2 analog outputs, with configurable voltage and current input ranges. It communicates through dual Ethernet ports and connects to the terminal board through a DC-37 interface. The module includes processor and data-acquisition circuitry, built-in diagnostics, status LEDs, and an external 28 VDC control-power connection. It is used in turbine, compressor, and other industrial control applications where compatible Mark VIe/Mark VIeS hardware is installed.
Product Datasheet
| Parameter | Specification |
|---|---|
| Brand | General Electric (GE) |
| Model | IS420YAICS1B |
| Functional Acronym | YAIC |
| Series | Mark VIe / Mark VIeS |
| Product Name | Analog I/O Pack |
| Product Type | Analog Input/Output I/O Pack |
| Total Analog Channels | 12 channels |
| Analog Inputs | 10 channels |
| Analog Outputs | 2 channels |
| AI Channels 1–8 | 1–5 VDC, ±5 VDC, ±10 VDC, or 0–20 mA |
| AI Channels 9–10 | 0–20 mA or ±1 mA |
| Analog Input Resolution | 16-bit A/D |
| Analog Input Accuracy | 0.1% of full scale |
| Analog Outputs | 0–20 mA |
| Analog Output Resolution | 14-bit D/A |
| Analog Output Accuracy | Approx. 0.5% |
| Ethernet | Dual RJ45 Ethernet / I/O Ethernet networks |
| Terminal Interface | DC-37 |
| Control Power | 28 VDC |
| Typical Control Power | Approx. 8 W per YAIC in Mark VIeS configuration |
| Processor Board | BPPC |
| Construction | Aluminum housing |
| Status Indicators | Front-panel diagnostic LEDs |
| Mounting | Associated terminal-board assembly; application-dependent |
| Operating Temperature | Up to -40 to +70°C for documented Mark VIeS configurations |
| Condition | New Surplus – No Box (NSNB) |
| Discontinued | Not identified as discontinued in the referenced GE documentation |
Functional Features
- Supports up to 10 analog inputs and 2 analog outputs.
- Configurable voltage and current input ranges for different field instrumentation.
- Dual Ethernet connectivity for communication with compatible Mark VIe/Mark VIeS control networks.
- Built-in power-up and continuous diagnostic monitoring.
- Provides visual status indication through onboard LEDs.
- Designed for use with compatible GE analog terminal boards such as TBAI/STAIS-series assemblies.
- Supports simplex configurations and applicable TMR configurations using multiple I/O packs.
- Suitable for turbine and compressor control systems requiring analog field signal acquisition and output.
FAQ
Q: What system is the IS420YAICS1B designed for?
A: It is designed for GE Mark VIe and Mark VIeS control system applications.
Q: How many analog channels does it provide?
A: The YAIC architecture provides 12 analog channels: 10 analog inputs and 2 analog outputs.
Q: Can the input channels handle both voltage and current signals?
A: Yes. The documented input ranges include voltage and current configurations, depending on the channel.
Q: Does the module connect directly to field wiring?
A: Field wiring is normally terminated on the compatible analog terminal board. The I/O pack connects to the terminal board through its dedicated interface.
Q: Can it be used in a TMR system?
A: Applicable Mark VIeS configurations can use three IS420YAICS1B packs for TMR operation. The exact terminal-board and system configuration must be verified before installation.
Q: Is IS420YAICS1B interchangeable with IS420YAICS1A?
A: Do not assume direct interchangeability. Hardware revision, terminal-board compatibility, firmware, and system configuration should be checked before replacement.
Troubleshooting & Safety
- Confirm the exact IS420YAICS1B part number and hardware revision before installation.
- Verify the compatible terminal board and controller configuration.
- Check the 28 VDC supply and connector condition if the pack does not power up.
- Inspect both Ethernet connections and network status indicators when communication faults occur.
- Verify analog signal wiring, polarity, scaling, and configured input range before troubleshooting the control software.
- Do not connect field wiring while energized unless the site procedure and equipment design specifically permit it.
- Follow the applicable GE Mark VIe/Mark VIeS maintenance procedures and plant lockout/tagout requirements.
- For safety-system applications, replacement hardware should match the required hardware revision and approved system configuration.
Recommended GE Models
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- GE IS420PPDAH1B — Mark VIe Power Distribution Feedback I/O Pack
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