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GE IS220PSVOH1A Mark VIe Pressure Switch/Valve Control Module
Product Overview
The GE IS220PSVOH1A is a high-reliability pressure switch and valve control module engineered for GE’s Mark VIe Speedtronic™ turbine control system, a cornerstone of power generation, oil and gas, and heavy industrial automation. As a critical interface component, this module bridges field pressure sensors, control valves, and the central controller, enabling real-time monitoring and regulation of pressure levels in turbine-driven processes. The IS220PSVOH1A supports 8 isolated pressure input channels (4-20mA) and 4 discrete output channels (24V DC), making it ideal for applications requiring precise pressure-based valve actuation, such as steam turbine bypass valves or gas compressor anti-surge controls.
Designed for rugged environments, the IS220PSVOH1A operates reliably across -40°C to +70°C and features a durable metal enclosure, ensuring resilience against vibration, humidity, and corrosive atmospheres common in offshore platforms and power plants. Its hot-swappable design allows maintenance without system shutdown, minimizing downtime in 24/7 operations. The module integrates seamlessly with Mark VIe components like IS220PRTDH1A (RTD input) and IS220PAICH2A (power supply), forming a cohesive control loop. LED indicators provide instant feedback on power status, channel activity, and fault conditions, simplifying diagnostics.
Within the Mark VIe ecosystem, the IS220PSVOH1A acts as a vital link in safety instrumented systems (SIS), with compliance to UL 508 and IEC 61010 standards ensuring it meets strict industrial safety requirements. Its ability to process pressure signals with 0.1% accuracy and execute valve commands in milliseconds makes it indispensable for maintaining process stability during transient events.
Technical Specifications
| Parameter Name | Parameter Value |
|---|---|
| Product Model | IS220PSVOH1A |
| Manufacturer | GE |
| Product Type | Pressure Switch/Valve Control Module |
| Series | Mark VIe Speedtronic™ |
| Input Channels | 8 isolated pressure inputs (4-20mA) |
| Output Channels | 4 discrete outputs (24V DC, 0.5A per channel) |
| Accuracy | ±0.1% of full scale (pressure measurements) |
| Power Supply | 24V DC (±10%), dual redundant inputs |
| Communication Protocol | Mark VIe backplane (proprietary) |
| Physical Dimensions | 152mm (L) × 89mm (W) × 64mm (D) |
| Weight | 0.65 kg |
| Operating Temperature | -40°C to +70°C |
| Humidity | 5–95% non-condensing |
| Mounting Type | Rack-mounted (Mark VIe I/O rack compatible) |
| Protection Features | Overvoltage, short-circuit, reverse polarity |
| Compliance | UL 508, IEC 61010, CE |
| Country of Origin | United States |
Main Features and Advantages
Precision Pressure Regulation
The IS220PSVOH1A delivers ±0.1% measurement accuracy across its 8 pressure input channels, ensuring reliable data for critical control loops. This precision allows for fine-tuning of valve positions—essential for maintaining turbine efficiency in power plants or preventing compressor surge in oil and gas facilities.
Rugged Industrial Design
With a -40°C to +70°C operating range and robust metal enclosure, the IS220PSVOH1A thrives in harsh environments, from desert power plants to offshore platforms. Its sealed connectors and conformal-coated circuit board resist dust, moisture, and chemical exposure, reducing maintenance needs in corrosive settings.
Redundant Operation
Dual 24V DC power inputs and redundant communication pathways minimize single points of failure. If one power source or communication link fails, the module seamlessly switches to the backup, ensuring uninterrupted operation—a critical feature for safety-critical systems like turbine emergency shutdown (ESD) loops.
Seamless Mark VIe Integration
The IS220PSVOH1A pairs with Mark VIe terminal boards such as IS200TBAIH2C (analog interface) and IS230TNDSH2A (discrete terminal), simplifying wiring and reducing installation time. It also integrates with GE’s Proficy™ software for remote monitoring, allowing technicians to track pressure trends and valve performance without onsite visits.
Real-Time Diagnostics
LED indicators for power, channel activity, and faults provide instant visual feedback, while internal self-tests continuously verify component health. This allows for proactive troubleshooting, reducing unplanned downtime in industries where even minutes of outage incur significant costs.
Application Fields
The GE IS220PSVOH1A is integral to industries relying on precise pressure and valve control:
- Power Generation: In thermal, combined-cycle, and nuclear plants, it monitors turbine inlet pressure, steam header pressure, and generator cooling system pressure. It controls bypass valves to regulate steam flow during load changes, ensuring grid stability and compliance with nuclear safety standards.
- Oil and Gas: Offshore platforms and refineries use the IS220PSVOH1A to manage wellhead pressure, compressor anti-surge valves, and pipeline flow control. Its rugged design withstands salt spray and vibration, while its fast response prevents overpressure events in high-pressure gas systems.
- Industrial Manufacturing: Chemical plants deploy the module to control reactor pressure and regulate valve positions in batch processing, ensuring consistent product quality. In pulp and paper mills, it manages steam pressure for drying processes, optimizing energy use.
- Marine Propulsion: Shipboard turbine systems rely on the IS220PSVOH1A to monitor lube oil pressure and control fuel valve actuators, ensuring reliable engine performance in rough seas. Its compact size fits easily in space-constrained shipboard control cabinets.
Related Products
- GE IS200TBAIH2C: Analog terminal board that connects pressure sensors to the IS220PSVOH1A, providing signal conditioning for 4-20mA inputs.
- GE IS230TNDSH2A: Discrete terminal board that interfaces the IS220PSVOH1A’s output channels with control valves, offering secure wiring for 24V DC signals.
- GE IS220PAICH2A: Redundant power supply that delivers 24V DC to the IS220PSVOH1A and other Mark VIe modules, ensuring stable operation.
- GE IS220PRTDH1A: RTD input module that works with the IS220PSVOH1A in systems requiring both pressure and temperature monitoring, such as turbine bearing controls.
- GE IS220PPROH1A: Backup protection module that uses pressure data from the IS220PSVOH1A to trigger emergency turbine trips, enhancing safety.
- GE IS230TNSVH3A: Servo valve control terminal board that complements the IS220PSVOH1A in applications requiring precise proportional valve actuation.
Installation and Maintenance
Pre-installation preparations: Verify the Mark VIe I/O rack is grounded and powered with 24V DC (±10%). Mount the IS220PSVOH1A in the rack, securing it with captive screws to prevent vibration-induced loosening. Connect pressure sensors to input channels using shielded twisted-pair cables, ensuring proper polarity. Wire output channels to control valves via the recommended terminal board, and confirm all connections match GE’s wiring diagrams to avoid signal interference.
Maintenance suggestions: Conduct monthly visual inspections to check for loose terminals, damaged wires, or dim LEDs. Clean dust from ventilation slots with compressed air to prevent overheating. Quarterly, use a calibrator to verify pressure input accuracy and test output channels by activating valves manually. Update firmware annually via Proficy™ software to ensure compatibility with newer Mark VIe components. When replacing the IS220PSVOH1A, label wires before removal to simplify reinstallation, and retest all channels post-installation to confirm proper operation.
Product Guarantee
Our company offers a one-year quality warranty service for the IS220PSVOH1A, covering hardware malfunctions not caused by human factors. During the warranty period, if the product shows abnormal performance or functional failure, we will provide replacement services. In addition, for discontinued models or urgent demands, relying on our global supply chain network, we can quickly respond to customers’ procurement needs for scarce spare parts, and provide reliable services to support the continuous and stable operation of industrial systems. As a leading import and export trade distribution company with 17 years of experience, we maintain a large stock of IS220PSVOH1A and related Mark VIe components, ensuring rapid delivery to minimize downtime for our clients.
Whatsapp:+86 18859254943
E-mail :sales@ygplc.com
E-mail :sales@ygplc.com
