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GE IS220PAICH1B

Product Name:​ Mark VIe Analog Input/Output (PAIC) Module / I/O Pack
Product Introduction:​ The IS220PAICH1B is a GE Mark VI/Mark VIe Speedtronic turbine control system analog I/O module. It performs well in both Simplex and TMR (triple module redundancy) configurations, providing fault isolation functionality in TMR systems through its built-in “suicide relay,” ensuring high reliability and availability in critical applications.
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Detailed content

Technical Specifications:
  • Manufacturer:​ GE (General Electric)
  • Product Type:​ Analog Input/Output (PAIC) Module / I/O Pack
  • Series:​ GE Mark VI/Mark VIe Speedtronic Turbine Control System
  • Analog Input Channels:​ Up to 10 (first 8 configurable, last 2 fixed types)
  • Analog Input Types:​ ±5 V DC, ±10 V DC, 0–20 mA, ±1 mA (depending on channel and configuration)
  • Analog Output Channels:​ 2 (0–20 mA)
  • Output Compliance:​ 18V (in Simplex or TMR mode)
  • Input Converter Resolution:​ 16-bit ADC
  • Output Converter Resolution:​ 14-bit DAC
  • Scanning Time:​ Typical 5 ms (200 Hz)
  • Power Supply:​ Minimum 22.8 VDC, nominal 24–28 VDC (via 3-pin power input)
  • Communication Interface:​ Dual 100MB full duplex RJ45 Ethernet ports
  • Field Connector:​ DC-37 pin D-sub connector
  • Terminal Board Compatibility:​ IS200TBAIH1C, IS200TAIH1A, IS200TAIH2A
  • Redundancy Support:​ Simplex and TMR (triple module redundancy)
  • Fault Detection:​ Monitors abnormal output current, including a “suicide relay” for TMR system fault isolation
  • Operating Temperature:​ -40°C to +70°C (-40°F to 158°F)
  • Certification:​ UL E207685 (non-hazardous area), ATEX Zone 2, Group IIC
  • Power Consumption:​ Typical 5.3 W, worst-case 6.2 W
  • Isolation:​ 2500V AC field-to-logic
  • Dimensions:​ 122 × 82 × 60 mm
  • Weight:​ 0.45 kg
Key Features:
  • High precision analog signal processing with 16-bit ADC and 14-bit DAC
  • Flexible input configuration (voltage or current)
  • Powerful dual 100MB full duplex Ethernet communication
  • TMR support with “suicide relay” for fault isolation
  • Onboard LED diagnostic indicators
  • Automatic reconfiguration support
  • Hot-swappable design
Working Principle:​ The module operates as a distributed field I/O pack within the Mark VIe control architecture, sitting at Purdue Model Level 1. It connects directly to the I/O network via dual redundant RJ45 Ethernet ports, communicating with the main controller (UCV) over a private, high-speed Ethernet segment. This design eliminates traditional backplane wiring, allowing remote mounting near field sensors.
Application Scenarios:​ GE Mark VI/Mark VIe Speedtronic steam turbine control systems, industrial automation, and process control.
Installation Requirements:​ Connect to compatible terminal boards (IS200TBAIH1C, IS200TAIH1A, or IS200TAIH2A) via DC-37 pin connector. Provide 24–28 VDC power via 3-pin input. Connect dual RJ45 Ethernet ports to I/O network.
Usage Notes:​ Calibrate analog inputs via ToolboxST software (digital calibration, no physical trims). Apply precision 4mA/20mA signals and perform zero/span calibration. For 22mA output fault conditions, disconnect field wiring, verify loop resistance, and check for damaged output driver circuits before replacing the module.

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