The GE IS420UCSBS1A is a UCSB Controller Module that functions as a safety controller. It is part of the Mark VIe and Mark VIeS control systems, which are used in a variety of industrial applications, including power generation, oil and gas, and chemical processing.

The IS420UCSBS1A is a high-performance safety controller that is designed to meet the most demanding safety requirements. It is equipped with a number of features that make it ideal for use in critical applications, including:

• Redundant processors and communication channels
• Self-testing diagnostics
• Fail-safe operation
• The ability to be programmed in a variety of languages

The IS420UCSBS1A is also certified to a number of international safety standards, including IEC 61508.

The IS420UCSBS1A was discontinued by General Electric in September 2022. However, it is still available from a number of third-party suppliers.

Here are some of the specifications of the IS420UCSBS1A:

• Processor: Dual PowerPC 440 processors
• Memory: 512 MB SDRAM
• Storage: 2 GB flash memory
• Communication: Dual Ethernet ports, dual RS-232 ports, USB port
• Power supply: 24 VDC