Description
IS220PDIOH1A: Product Overview
The GE IS220PDIOH1A is a discrete input/output (I/O) module designed specifically for GE Mark VIe gas and steam turbine control systems, a legacy platform renowned for its reliability in industrial power generation. As part of the Mark VIe ecosystem, it acts as a “signal gateway” between field devices (e.g., turbine blade position switches, fuel flow sensors) and the VMEbus controller, ensuring accurate digital signal transmission and real-time monitoring—critical for maintaining turbine stability and efficiency.
Role in Automation Systems:
Positioned as a “field signal interface” in Mark VIe architectures, the IS220PDIOH1A performs two primary functions:
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Signal Acquisition: Receives digital signals from field devices (e.g., a limit switch indicating a turbine valve is open) and converts them into a format suitable for the VMEbus controller.
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Signal Transmission: Sends processed digital signals to the VMEbus controller for real-time analysis (e.g., triggering a shutdown if a safety switch is activated) and routes control commands from the controller to field actuators (e.g., turning on a pump).
Core Functionality:
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VMEbus Compatibility: Conforms to VMEbus Rev. C.1, ensuring seamless integration with VME64 backplanes and controllers (e.g., GE Fanuc 90-30 series). This allows the module to work with existing Mark VIe components without major system upgrades.
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Flexible Signal Handling: Supports 24 discrete input channels (grouped into 8 sets) and 12 relay output channels, making it adaptable to diverse field devices (e.g., switches, relays, sensors).
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High Precision: Uses optocouplers for galvanic isolation, protecting sensitive controller circuits from voltage spikes and electromagnetic interference (EMI) in harsh industrial environments.
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Rugged Design: Industrial-grade components and a compact form factor enable 24/7 operation in high-temperature, high-vibration environments (e.g., power plant turbine halls).
Platform Benefits (Mark VIe Series):
The IS220PDIOH1A inherits the Mark VIe platform’s strengths, including:
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Reliability: The Mark VIe system is the industry standard for gas turbine control, with a proven track record of 24/7 operation in power plants worldwide.
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Legacy Compatibility: The module is designed to work with existing Mark VIe components (e.g., I/O modules, contactors), reducing the cost of system upgrades.
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Scalability: Supports expansion with additional I/O modules to accommodate growing system demands (e.g., adding more sensors to a turbine control system).
GE IS220PDIOH1A
Technical Specifications
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Model Number: IS220PDIOH1A (Variant of Mark VIe Series)
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Manufacturer: GE (General Electric)
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Product Type: Discrete I/O Module
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Series: Mark VIe (Gas/Steam Turbine Control)
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Form Factor: 6U Eurocard (160 mm × 233 mm)
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Bus Standard: VMEbus Rev. C.1 (supports 8/16/32-bit data transfer)
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Input Channels: 24 discrete (dry/wet contact, 20–42.5 VDC nominal)
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Output Channels: 12 relay (form C, 0.5A max per channel, 24 VDC nominal)
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Isolation: Galvanic isolation (optocouplers, 1500 V AC channel-to-channel)
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Operating Temperature: 0°C to +60°C (industrial-grade)
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Storage Temperature: -40°C to +85°C
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Humidity: 5–95% non-condensing
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Weight: 0.4 kg (0.88 lbs)
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Certifications: CE, UL (inferred from GE industrial product standards)
Core Features & Customer Value
1. Reliable Signal Transmission:
The IS220PDIOH1A’s galvanic isolation and VMEbus compatibility ensure accurate digital signal transmission from field devices to the controller, even in electrically noisy environments. For example, in a power plant, the module can reliably detect a turbine emergency stop switch activation and transmit the signal to the VMEbus controller, which triggers an immediate shutdown to prevent damage.
2. Flexible Configuration:
24 discrete input channels and 12 relay output channels allow engineers to customize the module’s functionality for different field devices, reducing the need for additional signal conditioning hardware. This flexibility saves time and money during installation.
3. Rugged Industrial Design:
The module’s operating temperature range (0°C to +60°C) and compact form factor make it suitable for harsh industrial environments. Its DIN rail mounting option simplifies installation in crowded control cabinets, reducing setup time and effort.
4. Easy Integration:
VMEbus compatibility ensures seamless integration with existing VMEbus systems, minimizing downtime and effort during upgrades. This is invaluable for facilities with legacy VMEbus installations, allowing them to enhance system capabilities without replacing entire architectures.
GE IS220PDIOH1A
Typical Applications
The GE IS220PDIOH1A is widely used in industrial automation systems for:
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Power Generation:
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Monitors digital signals from gas/steam turbines (e.g., valve position switches, emergency stop buttons) and communicates them to the VMEbus controller for real-time control.
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Manufacturing:
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Used in assembly lines to monitor the status of limit switches, proximity sensors, and other digital devices, enabling precise control of manufacturing processes.
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Petrochemical Industry:
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Controls digital signals from refinery equipment (e.g., pump start/stop commands, valve positions), ensuring safe and efficient operation in hazardous environments.
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