GE Vernova IS220PSCAH1B Mark VIe Serial Communications Module
A 28 VDC serial communications I/O pack used with approved SSCA terminal assemblies in the Mark VIe control platform.
Product Profile
IS220PSCAH1B is the H1B execution of the GE Mark VIe PSCA Serial Communications Module. It mounts with an approved SSCA terminal assembly to connect serial field devices to the Mark VIe control system.
The H1B suffix, I/O pack identity and terminal-board code must all be retained. GE certification documentation lists IS220PSCAH1B with IS200SSCAH1A or IS200SSCAH2A, while other PSCA generations use different terminal assemblies.
Technical Data
| Manufacturer | GE Vernova |
|---|---|
| Model | IS220PSCAH1B |
| Control Platform | Mark VIe |
| Product Type | PSCA serial communications module |
| Hardware Execution | H1B |
| Power Supply | 28 VDC |
| Maximum Documented Current | 0.36 A DC |
| Approved Terminal Assemblies | IS200SSCAH1A or IS200SSCAH2A in the documented certified arrangement |
| Installation Boundary | Use the terminal assembly, wiring and system configuration assigned to the H1B pack |
| Hazardous-Area Marking Context | Ex nA / Ex ec IIC T4 Gc under the documented certified installation |
| Configuration Record | Serial channel protocol, address, baud, framing and controller mapping |
| Acceptance | Pack diagnostics, channel communication, data quality and alarm verification |
System Role
Provides the serial communication interface between field devices and Mark VIe control.
Works with the SSCA terminal assembly that lands the field wiring.
Uses the Mark VIe I/O network and controller configuration for channel data.
Maintains certified installation relationships between the pack and terminal hardware.
Compatibility
- Confirm IS220PSCAH1B rather than another PSCA or IS221 execution.
- Match IS200SSCAH1A or IS200SSCAH2A and preserve its revision and field wiring.
- Export each serial channel protocol, address, baud rate, parity and controller map.
- For hazardous-area use, retain the complete certified equipment and installation conditions.
Applications
- Serial integration of supported field devices with a Mark VIe control system.
- Replacement of an existing PSCA H1B I/O pack while retaining the SSCA terminal board.
- Maintenance where serial link diagnostics and exact channel settings must be preserved.
FAQ
Why does an IS220PSCAH1B quotation need the terminal-board code?
The I/O pack is certified and engineered with specific SSCA terminal assemblies; another generation may not preserve the same interface.
What settings should be captured before changing IS220PSCAH1B?
Record protocol, device address, baud rate, data bits, parity, stop bits, channel mapping and controller configuration.
What can cause IS220PSCAH1B channel faults without a failed pack?
Field-device power, cable shielding, grounding, polarity, termination or mismatched framing can interrupt serial communication.
How should IS220PSCAH1B be tested after replacement?
Verify pack health, every channel connection, live data quality, stale-data alarms and recovery after a controlled communication interruption.
Can IS221PSCAH1B directly replace IS220PSCAH1B?
Do not assume so. The I/O pack generation and assigned terminal assembly must be checked against the Mark VIe system documentation.
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