Description
Product Overview
The GE IS220PDIOH1A is a distributed discrete I/O pack for the Mark VIe Speedtronic turbine control platform. PDIO stands for Pack Discrete Input/Output. It integrates a local processing unit, digital input and digital output circuits, and dual redundant IONet Ethernet ports. It connects the Mark VIe main controller to field discrete devices via matched terminal boards, acquiring contact status and executing on/off control commands for gas turbines, steam turbines and combined cycle power generation control systems. It can be deployed in simplex or TMR redundant rack architectures.
Technical Specifications
| Item | Parameter |
|---|---|
| Part Number | IS220PDIOH1A |
| Manufacturer | GE General Electric |
| Platform | Mark VIe / Mark VIeS Speedtronic |
| Module Type | PDIO Discrete I/O Pack |
| Communication | Dual 10/100Mbps RJ45 Ethernet for IONet redundant bus |
| Power Supply | 28 VDC nominal control power |
| Operating Temp | 0 °C ~ +65 °C |
| Humidity | 5%–95% non-condensing |
| Enclosure | Compact metal packaged I/O pack, IP20 cabinet mount |
| Diagnostics | Front panel LED indicators for power, network link, pack health |
| Software | Configured and diagnosed via GE ControlST |
| Hazardous Rating | Class I Division 2 certified |
Key Features
- Integrated local processor for on-board signal conditioning and fast discrete I/O handling
- Dual redundant IONet Ethernet links to eliminate single communication point of failure
- Hot-swappable I/O pack, can be replaced online with proper plant safety procedures
- Continuous self-diagnostics for communication faults, supply voltage and internal hardware errors
- Works with Mark VIe terminal boards for field wiring of digital contact inputs and relay/solenoid outputs
- Supports high-speed discrete logic for turbine permissives, trip interlocks, valve status feedback and auxiliary equipment control
- Designed for vibration resistance and continuous long-term operation in power plant control cabinets
- Compatible with TMR triple redundant Mark VIe control racks for high-reliability turbine protection
Application
Primarily used in gas turbine, steam turbine and combined cycle power plant Mark VIe control cabinets. It interfaces field limit switches, pressure / temperature contact alarms, breaker status, solenoid valves and auxiliary relays to the main Mark VIe controller, handling turbine startup permissives, trip logic and auxiliary machinery discrete control.
Installation & Maintenance Notes
- ESD protection required when handling the I/O pack
- Isolate field wiring and verify lockout/tagout before removing or installing the module
- Check both Ethernet IONet links after replacement; both network paths should show healthy link status
- Match with the correct Mark VIe terminal board for field discrete wiring
- Verify 28VDC control supply before powering up the pack
- Upload control database and perform point checkout, test all DI/DO channels after replacement
- Separate IONet control network cables from high voltage and high power wiring to reduce EMI
- Review ControlST diagnostic alarms and LED status to confirm module health post commissioning
FAQ
Q: What does PDIO mean? A: PDIO = Pack Discrete Input/Output, the Mark VIe distributed digital I/O pack with local processor and IONet communication.
Q: Is IS220PDIOH1A hot swappable? A: Yes, it supports hot swap for the I/O pack hardware; field safety circuits should be evaluated before online replacement.
Q: What network does it use to communicate to the Mark VIe controller? A: GE proprietary IONet over dual redundant Ethernet.
Start Chat
Send an Email
