Description
GE IS220PDIOH1A Product Description
Description:
The IS220PDIOH1A is a high-reliability discrete I/O module engineered by General Electric (GE), serving as a core component of the Mark VIe Speedtronic turbine control system. It acts as a critical interface between field devices and central controllers, integrating digital signal collection and control execution to enable precise, real-time management of industrial processes in power, oil & gas, and heavy industry.
Application Scenarios:
A 400MW combined-cycle gas turbine plant in the Middle East faced persistent challenges with its auxiliary system control: legacy I/O modules lacked isolation protection, leading to frequent signal interference from turbine vibration, and required manual shutdowns for module replacement—causing 2–3 hours of unplanned downtime monthly. After deploying IS220PDIOH1A, the plant eliminated interference issues via the module’s 2500Vrms isolation , while its hot-swap capability cut replacement time from hours to 15 minutes. Within six months, the plant reduced auxiliary system downtime by 80% and avoided over $150,000 in production losses. This scenario underscores how IS220PDIOH1A solves pain points of signal instability and maintenance inefficiency in mission-critical turbine infrastructure.
Parameter:
| Main Parameters | Value/Description |
| Product Model | IS220PDIOH1A |
| Manufacturer | General Electric (GE) |
| Product Category | Discrete I/O Module |
| I/O Channels | 24 digital inputs; 12 relay outputs |
| Power Requirement | 24V DC (dual redundant input supported) |
| Communication Interface | 2 Ethernet ports; supports EtherCAT protocol |
| Isolation Voltage | 2500Vrms (channel-to-channel, channel-to-ground) |
| Operating Temperature | -40°C to +70°C (wide range for harsh environments) |
| Physical Dimensions | 310mm × 170mm × 85mm |
| Weight | Approximately 4.5kg |
| Protection Features | 4000V lightning protection; 1.5A overcurrent protection |
| Compatible Terminal Boards | IS200TDBSH2A, IS200TDBTH2A |
| Key Function | Hot-swap capability; programmable input delay |

IS220PDIOH1A
Technical Principles and Innovative Values:
Innovation Point 1: Robust multi-layer protection design. Unlike standard I/O modules with basic surge protection, IS220PDIOH1A integrates 4000V lightning protection, 1.5A overcurrent protection, and 600W surge protection , reducing field-induced failures by 60% compared to competitors. Its 2500Vrms isolation also eliminates ground loops in high-vibration turbine environments.
Innovation Point 2: Hot-swap and flexible connectivity. The module’s hot-swap functionality allows replacement without system shutdown , while dual Ethernet ports and EtherCAT support (up to 1Mbps) ensure seamless integration with distributed control networks. This flexibility makes it 30% faster to deploy in retrofits than non-hot-swap alternatives.
Innovation Point 3: Hazardous area readiness. When paired with IS200TDBSH2A or IS200TDBTH2A terminal boards, IS220PDIOH1A meets hazardous location certifications , addressing the unmet need for reliable I/O in oil & gas and chemical sites where explosive atmospheres are present.
Application Cases and Industry Value:
Case 1: A Gulf Coast LNG plant deployed GE IS220PDIOH1A in its gas turbine-driven compression system to monitor flame detectors and pressure switches (via 24 digital inputs) and control fuel isolation valves (via 12 relay outputs). Prior to installation, the plant struggled with false shutdowns caused by electromagnetic interference from nearby compressors. The module’s 2500Vrms isolation eliminated these false signals, while its -40°C to +70°C temperature tolerance withstood the plant’s extreme outdoor conditions. Over a year, the plant reported zero interference-related shutdowns and a 25% reduction in maintenance labor, with engineers noting the module’s “rock-solid performance in harsh environments.”
Case 2: A Chinese shipyard integrated GE IS220PDIOH1A into the propulsion control system of a liquefied gas carrier. The module needed to collect discrete signals from propeller position sensors and trigger relay outputs for thruster adjustments, all while withstanding salt spray and vibration. Its rugged design and dual redundant power input prevented signal loss during rough seas, and the hot-swap feature allowed on-voyage maintenance without propulsion interruption. The ship operator reported 99.9% system uptime and praised the module’s “seamless compatibility with the Mark VIe ecosystem.”
Related Product Combination Solutions:
GE IS200TDBSH2A: Terminal board that enables hazardous area use with GE IS220PDIOH1A, connecting field devices while maintaining safety certifications.
GE IS220UCSAH1A: Universal controller module that receives I/O data from GE IS220PDIOH1A and executes turbine control logic for Mark VIe systems.
GE DS200TPSAG1A: 24V DC redundant power supply that ensures stable input for GE IS220PDIOH1A, preventing signal interruptions during voltage fluctuations.
GE IS220YDIAS1A: Digital input expansion module that adds channels when paired with GE IS220PDIOH1A for large-scale systems (e.g., multi-turbine plants).
GE IC660HHM501: Handheld diagnostic tool that tests GE IS220PDIOH1A’s Ethernet connectivity and channel functionality during routine checks.
GE IS230VCMI1A: Backplane interface module that optimizes data flow between GE IS220PDIOH1A and the Mark VIe controller, reducing latency by 15%.
GE IS220TPROS1CBB: Turbine protection module that triggers emergency output signals via GE IS220PDIOH1A during critical faults (e.g., overspeed).

IS220PDIOH1A
Installation, Maintenance, and Full-Cycle Support:
Installing GE IS220PDIOH1A is streamlined by its modular design and clear compatibility with Mark VIe systems. Prior to installation, verify alignment with terminal boards (e.g., IS200TDBSH2A) and use ESD-safe tools to avoid component damage. The dual Ethernet ports simplify network integration, while the optional 120Ω terminal resistor (activated via 5Pin interface) ensures signal integrity in long-cable runs. The module’s IP20 rating makes it suitable for control cabinets in turbine halls or offshore platforms.
Routine maintenance is minimal: weekly checks of LED indicators (power, communication, channel status) to spot issues early, and quarterly cleaning with compressed air. The hot-swap feature allows technicians to replace faulty modules without shutting down the control system, while built-in diagnostics (paired with Mark VIe HMI) pinpoint channel-level faults in seconds. GE backs IS220PDIOH1A with a 1-year warranty, including free replacement of defective units, and offers 24/7 global technical support for wiring or troubleshooting.
Call to Action:
Whether you’re upgrading gas turbine control systems, enhancing LNG plant automation, or optimizing marine propulsion infrastructure, GE IS220PDIOH1A delivers unmatched reliability and flexibility. Contact us for a customized solution tailored to your industry’s I/O needs, and let our expertise maximize your system’s uptime and efficiency.
Full 12-month warranty on all components
Dedicated after-sales support
Same-day dispatch on 1000s of parts
All units are fully tested
- 1. Email confirmation
You will get an email confirming that we have received your enquiry. - 2. Dedicated Account Manager
One of our team will be in touch to confirm your part(s) specification and condition. - 3. Your quote
You will receive a comprehensive quote tailored to your specific needs.


Full 12-month warranty
Available for dispatch immediately
We deliver worldwide
Full 12-month warranty on all components