IS220UCSAH1A (labelled IS220UCSAH1APR1): standalone Mark VIe processor

This IS220UCSAH1A standalone controller carries the label variant IS220UCSAH1APR1 and is offered used, cleaned and tested, with a one-year warranty. As a UCSA controller in the GE Speedtronic Mark VIe family, it is the panel-mounted computer that runs a turbine or balance-of-plant application and manages the distributed I/O packs over IONet, rather than interfacing field wiring itself.

The controller's role in the distributed control

The UCSA executes the control program on a Freescale MPC8349 PowerQUICC II Pro processor (667 MHz) under the QNX real-time operating system, holding its application and configuration on compact flash. Communication runs entirely over Ethernet: the private IONet to the I/O packs and the plant links to HMI, operator and engineering stations and to companion controls such as Mark VI, Mark VIe and EX2100 excitation. The faceplate LEDs (Power, Boot, Online, Flash, DC and Diag, with per-port Link/Act) report where the module is in startup. It runs fanless, is rated for Class I, Division 2, and is not IEC 61508 safety-certified.

Rule out the easy causes before swapping the controller

• Network path: an offline controller is most often an IONet or plant-network cable, switch or port. Prove the network good before ordering hardware.
• Compact flash and software: a corrupt CF card or a ControlST or firmware version mismatch stalls startup on healthy hardware; a replacement must be loaded with your application to run.
• Control power: check the feed and the DC LED; a weak supply looks like a failed controller.
• Fault scope: missing points implicate an I/O pack or an IONet branch; a genuine controller failure drops the whole application offline.
• Diagnostics: read the Diag LED and the ToolboxST log before condemning the module.

IS220UCSAH1APR1: reading the full label string

The core number breaks down as IS220UCSA (controller) plus H1A (hardware group). The PR1 appended on this label is an additional GE ordering code carried after the group; rather than guess at its meaning, the reliable approach is to treat the entire printed string as the identifier and match it to your installed unit. A clear label photo lets us confirm the exact variant. For the structure of the base number, see the GE Speedtronic Part Number Decoder.

How the UCSA coordinates I/O over IONet

IONet is a private, dedicated Ethernet that carries only traffic between the controllers and the I/O packs, which keeps control data deterministic and separate from the plant network. In a simplex system one UCSA runs the machine; in a TMR system three controllers on the <R>, <S> and <T> cores work with voted I/O for redundancy. The UCSA is well matched to balance-of-plant and retrofit duty; heavier model-based control was served by higher-tier controllers in the same family.

Make your quote request specific

Send the complete printed part number, including the PR1 code and any revision letter, a label photo, the application it controls, the Mark VIe control and ControlST version if known, simplex or TMR, quantity and timeline.

Request a quote today

This IS220UCSAH1A / IS220UCSAH1APR1 is used, cleaned and tested. Request a Quote for a reply within 24 hours, worldwide DDP delivery and purchase orders accepted. More Mark VIe hardware is in our GE Mark VI IS200 Boards collection.

General Information about the Product
Part Number	IS220UCSAH1A Mark VI IS220
Description	IS220UCSAH1A By General Electric IS220UCSAH1APR1 Standalone Processor Module
Condition	used Cleaned and Tested. With 1 Year Warranty.