IS420YAICS1B | GE Mark VIe / Mark VIeS Analog I/O Pack

Product Overview

The GE IS420YAICS1B is an Analog I/O Pack for the Mark VIe and Mark VIeS control systems. It supports 10 analog inputs and 2 analog outputs, with 8 inputs configurable for ±5 V, ±10 V, or 4–20 mA, and 2 inputs dedicated to ±1 mA or 4–20 mA. Featuring a 16-bit ADC, 0.1% full-scale accuracy, and dual RJ-45 Ethernet IONet ports, it provides high-precision signal acquisition for turbine control and balance-of-plant applications. The S1B revision uses the advanced BPPC processor board. Reference: GEH-6725 (Mark VIe/VIeS Controls Equipment).

Key Specifications

• Model: IS420YAICS1B
• Type: Analog I/O Pack
• Series: Mark VIe / Mark VIeS
• Total Channels: 12 (10 inputs + 2 outputs)
• Inputs 1–8: ±5 VDC, ±10 VDC, or 4–20 mA
• Inputs 9–10: ±1 mA or 4–20 mA
• Outputs: 2 × 0–20 mA
• Input Accuracy: 0.1% full scale
• Output Accuracy: ±0.5%
• Resolution: 16-bit ADC
• Power Consumption: 5.3 W typical
• Frame Rate: 10 ms
• Power Supply: 28 VDC (via 3-pin connector)
• Ethernet: Dual RJ-45 IONet ports
• Field Connection: DC-37 pin to terminal board
• Dimensions: 3.25 × 1.65 × 4.78 in (H × W × D)
• Weight: 0.22–0.34 kg
• Operating Temperature: -40°C to +70°C (-40°F to 158°F)

Environmental Specifications

• Operating Temperature: -40°C to +70°C
• Storage Temperature: -40°C to +85°C
• Humidity: 5% to 95% RH (non-condensing)
• Software Compatibility: ControlST V06.01 and later
• Firmware: V05.01 or later

Installation Guide

1. Mount the IS420YAICS1B on a compatible terminal board (TBAIS1C or STAIS2A).
2. Connect field analog signals to the terminal board, observing polarity and shielding.
3. Connect dual Ethernet cables to IONet for redundant controller communication.
4. Apply 28 VDC power and configure input/output types via ToolboxST.
5. Calibrate channels using precision reference sources and verify accuracy.

FAQ

• Q: What is the difference between YAICS1A and YAICS1B?
  A: S1B uses the BPPC processor board with extended firmware support; S1A uses BPPB with limited lifecycle. They cannot be mixed on the same terminal board.
• Q: Does it support HART communication?
  A: HART is optional for internally powered mA input modes when configured with HART-enabled terminal boards.
• Q: Can it be used in TMR?
  A: Yes, three YAICS1B packs can be used in TMR; all three must be identical hardware revisions.
• Q: What filtering is provided?
  A: Hardware filter with unipolar attenuation from 500 rad/s; software low-pass filter configurable at 0.75, 1.5, 3, 6, or 12 Hz.

Selection Tips

• Choose IS420YAICS1B for high-precision analog I/O in Mark VIe turbine and process control.
• Verify terminal board compatibility (TBAIS1C/STAIS2A) before ordering.
• Use S1B for new installations; S1A is legacy and should be replaced with S1B during upgrades.

Data Source: Verified against GE official manual GEH-6725 (Rev G, Mark VIe/VIeS Controls Equipment) and WOC hardware specifications. Note: Some third-party distributors incorrectly list this as "16 AI"; the official specification is 10 AI + 2 AO.