The GE Fanuc IS220PDOAH1A is a Mark VIe Discrete Output I/O Pack used to interface the control system with discrete output terminal boards. Although some listings describe it as a processor module, its primary role is a discrete output interface within the Mark VIe distributed I/O architecture. The pack contains a processor board and a dedicated acquisition/output board, connects to one or two I/O Ethernet networks, and interfaces with compatible TRLY or SRLY terminal boards through a DC-37 connection. It can control up to 12 relay outputs, depending on the associated terminal-board configuration.
| Specification | Details |
|---|---|
| Brand | GE Fanuc / General Electric |
| Model | IS220PDOAH1A |
| Series | Mark VIe |
| Product Name | Discrete Output I/O Pack |
| Functional Acronym | PDOA |
| Application | Industrial Turbine Control / Distributed I/O |
| Output Type | Discrete / Relay Output |
| Relay Capacity | Up to 12 relays |
| Network Interface | 2 × RJ45 Ethernet ports |
| Terminal Interface | DC-37 |
| Compatible Terminal Boards | TRLY and SRLY |
| Power Connection | 3-pin power input |
| Memory | 128 MB Flash |
| Dimensions | Approx. 8.26 × 4.19 × 12.1 cm |
| Weight | Approx. 0.34 kg |
| Condition | New / New Surplus / Open Box, depending on inventory |
| Status | Legacy Mark VIe component |
FAQ
Q: What is the IS220PDOAH1A used for?
A: It provides the interface between Mark VIe I/O Ethernet networks and compatible discrete output terminal boards.
Q: Is IS220PDOAH1A a CPU?
A: It contains a processor board, but its system function is a Discrete Output I/O Pack rather than the main Mark VIe controller CPU.
Q: How many relay outputs can it control?
A: The pack can control up to 12 relays when used with the appropriate supported terminal board.
Q: Which terminal boards are compatible?
A: Sources identify TRLY and SRLY terminal boards as supported families; DRLY boards are not supported.
Q: What should be checked before replacement?
A: Confirm the exact IS220PDOAH1A revision, terminal-board model, Ethernet configuration, control architecture, and installed Mark VIe configuration before installation.
Recommended GE Mark VIe / I/O Models
- IS220PDOAH1B — Discrete Output I/O Pack, later PDOA variant.
- IS220PAICH2A — Analog Input/Output I/O Pack.
- IS220PTURH1A — Turbine I/O Pack.
- IS220PTURH1B — Turbine I/O Pack.
- IS220PPRFH1A — Protection I/O Pack.
- IS220PPDAH1A — Power Distribution I/O Pack.
- IS220UCSAH1A — Mark VIe Universal Control System module.
- IS420UCSBH4A — Mark VIe controller module.
- IS420PPDAH1A — Mark VIe I/O Pack.
- IS200TDBSH2AAA — GE turbine control terminal board.
