Description
- Product Model: IS220PAICH1B
- Manufacturer: GE (General Electric)
- System Platform: GE Mark VIe Speedtronic Distributed Control System
- I/O Channels: Up to 10 analog inputs and 2 analog outputs (total 12 channels)
- Input Signal Types: ±5 V DC, ±10 V DC, 0-20 mA, ±1 mA configurable inputs
- Output Signal Range: 0-20 mA analog outputs with 18 V compliance
- ADC Resolution: 16-bit analog-to-digital conversion
- DAC Resolution: 14-bit digital-to-analog conversion
- Scan Time: Typical 5 ms (200 Hz)
- Communication Interface: Dual 100 MB full-duplex Ethernet ports for I/O network connectivity
- Power Supply Requirements: 22.8 V DC min, nominal 24-28 V DC
- Redundancy Support: Simplex and Triple Modular Redundancy (TMR) with fault isolation relay
- Operating Temperature Range: –40 °C to +70 °C
- Environmental Certification: UL E207685; compliant with ATEX Zone 2 Group IIC standards
- Typical Power Consumption: ~5.3 W typical, <6.2 W max
Technical Architecture & Functional Positioning
The IS220PAICH1B module functions as a dedicated analog input/output pack within the GE Mark VIe Speedtronic distributed control architecture. Its primary role is to bridge field-level analog sensors and actuators with the high-level controller network, translating real-world physical signals into high-resolution digital data for control logic execution and feedback loops.
Analog signal management is a critical subsystem in process and turbine control, where variables such as temperature, pressure, flow, and speed must be measured accurately to maintain stable and efficient operation. The IS220PAICH1B combines a dedicated acquisition board with processor logic to digitize up to ten configurable analog inputs and produce two precise analog outputs. Its integration via dual 100 MB full-duplex Ethernet interfaces enables real-time data exchange across the I/O network, ensuring the master controller receives timely, deterministic feedback and control signals.
From an engineering design perspective, the module addresses several key industrial performance requirements. High ADC resolution (16 bit) ensures that small variations in sensor signals are distinguished with minimal quantization error, which is essential for control loops where accuracy affects stability and performance. Similarly, the 14-bit DAC output provides refined control actuation, reducing overshoot or instability in feedback systems. The typical 5 ms scan time supports fast update rates necessary in high-speed control environments common in turbine and process applications.
Redundancy support via Simplex and TMR configurations enhances availability and resiliency in critical applications. The built-in fault isolation (“suicide relay”) disconnects failed outputs in TMR systems to prevent propagation of erroneous signals, maintaining system integrity under fault conditions. Environmental certifications, including UL and ATEX compliance, extend the module’s applicability to hazardous area installations, ensuring safe operation in environments with explosive gas atmospheres when appropriately installed.
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