GE IS220PDOAH1A | Mark VIe Discrete Output Pack

Description

Product Description

The GE IS220PDOAH1A is a Mark VIe Discrete Output I/O Pack designed for the GE Speedtronic Mark VIe distributed control system. It provides the electrical interface between one or two I/O Ethernet networks and a compatible discrete output terminal board. The pack contains a processor board and an acquisition board dedicated to discrete output functions.

The PDOA pack can control up to 12 relay outputs and receives terminal-board-specific feedback. It uses dual RJ45 Ethernet connections for IONet communication, a 3-pin input for external 28 VDC power, and a DC-37 connector for connection to the associated terminal board. Visual diagnostic indicators are provided on the pack.

The IS220PDOAH1A is designed for use with compatible GE terminal boards in the TRLY and SRLY families. For replacement applications, the exact terminal-board part number, control architecture, processor revision, and existing Mark VIe configuration should be verified before installation.

Product Datasheet

Functional Features

• Designed for the GE Speedtronic Mark VIe control platform.
• Provides a distributed discrete-output interface.
• Supports up to 12 relay outputs.
• Interfaces with one or two I/O Ethernet networks.
• Dual RJ45 ports provide IONet connectivity.
• External 28 VDC power connection through a 3-pin input.
• DC-37 interface connects directly to the associated terminal board.
• Includes processor and discrete-output acquisition circuitry.
• Accepts feedback from the connected terminal board.
• Supports electromagnetic and solid-state relay terminal-board configurations where applicable.
• Can be deployed in Simplex or TMR architectures according to the system design.
• Suitable for turbine-control maintenance, replacement, and legacy Mark VIe system support.

Compatible Terminal Board Families

The IS220PDOAH1A is documented for use with compatible discrete-output terminal boards including:

• IS200TRLYH2E
• IS200TRLYH3E
• IS200TRLYH1F
• IS200TRLYH2F
• Compatible TRLY/SRLY configurations according to the applicable Mark VIe hardware documentation.

Always verify the complete terminal-board model before replacement.

FAQ

Q1: What is the GE IS220PDOAH1A?
It is a GE Mark VIe Discrete Output I/O Pack, also known by its functional designation PDOA.

Q2: How many relay outputs can the PDOA control?
The IS220PDOAH1A can control up to 12 relays through the associated discrete-output terminal board.

Q3: What type of communication does it use?
The pack uses one or two RJ45 Ethernet connections for the Mark VIe I/O Ethernet network, or IONet.

Q4: What power supply does the pack require?
The PDOA uses an external 28 VDC supply through its 3-pin power input.

Q5: Does the PDOA work by itself?
No. It is designed to connect directly to a compatible discrete-output terminal board. The terminal-board model must be matched to the PDOA configuration.

Q6: Can it be used with TMR systems?
Yes. PDOA packs can be used in TMR architectures, where three I/O packs can be used in the signal path, subject to the compatible terminal-board and system configuration.

Q7: What is the difference between IS220PDOAH1A and IS220PDOAH1B?
They use different processor-board generations. The H1A version contains the BPPB processor board, while the H1B version uses a functionally compatible BPPC processor supported by later ControlST software versions.

Q8: What should I verify before ordering?
Verify the complete IS220PDOAH1A part number, revision, terminal-board model, IONet architecture, power arrangement, and existing Mark VIe configuration.

Troubleshooting & Safety

🛠️ Troubleshooting

• Check both RJ45 IONet connections if communication is unavailable.
• Verify the external 28 VDC supply and 3-pin power connection.
• Inspect the DC-37 connector for bent, contaminated, or damaged contacts.
• Confirm that the attached terminal board is a compatible PDOA model.
• Check the pack’s diagnostic LEDs for power, attention, link, and communication indications.
• In a TMR installation, identify the affected I/O pack before removing hardware.
• Verify ControlST configuration and processor compatibility when replacing an older pack.

⚠️ Safety

• De-energize the applicable control and field circuits before installation or removal.
• Follow the site’s lockout/tagout procedures.
• Verify the external 28 VDC supply is disconnected before handling the pack.
• Use appropriate ESD protection when handling the electronics.
• Do not substitute a terminal board solely because the connector appears physically compatible.
• Confirm relay wiring and output configuration before returning the turbine control system to service.

Recommended GE Mark VIe Models

1. IS220PDIOH1A — Mark VIe Discrete Input/Output Pack
2. IS220PDOAH1B — Mark VIe Discrete Output Pack, Updated Processor Version
3. IS220YDOAS1A — Mark VIeS Safety Discrete Output Pack
4. IS220PAICH1A — Mark VIe Analog I/O Pack
5. IS220PTURH1B — Mark VIe Turbine I/O Pack
6. IS220PPRFH1A — Mark VIe Protection I/O Pack
7. IS220PPDAH1B — Mark VIe Power Distribution I/O Pack
8. IS220PGENH1A — Mark VIe Generator I/O Pack
9. IS220PTCCH1A — Mark VIe Thermocouple I/O Pack
10. IS220PDIAH1A — Mark VIe Discrete Input Pack
11. IS200TRLYH2E — Mark VIe Relay Output Terminal Board
12. IS200TRLYH3E — Mark VIe Relay Terminal Board
13. IS200TRLYH1F — Mark VIe Discrete Relay Terminal Board
14. IS200TRLYH2F — Mark VIe Discrete Relay Terminal Board
15. IS200TDBTH2E — Mark VIe Terminal Relay Board