IS420UCSBS1A IS430SNUAH1A Mark VIeS Safety Controller

IS420UCSBS1A IS430SNUAH1A   Mark VIeS Safety Controller 

Product Overview

The GE IS420UCSBS1A is a high-reliability safety controller module engineered for GE’s Mark VIeS Speedtronic™ turbine control system, a cornerstone of safety-critical automation in power generation, oil and gas, and industrial process control.

As a SIL 2/3-certified device under IEC 61508. the IS420UCSBS1A delivers fail-safe operation in applications requiring stringent functional safety, such as turbine overspeed protection, emergency shutdown (ESD) systems, and burner management.

It integrates seamlessly with Mark VIeS I/O modules like IS420YDAIH1B and IS220YDAIH1A, providing real-time control and diagnostics for turbine speed, temperature, and pressure loops.

Powered by an Intel EP80579 600 MHz processor and running the QNX Neutrino real-time operating system, the IS420UCSBS1A executes complex control logic with deterministic precision.

Its fanless design ensures reliable operation in environments with extreme temperatures (-30°C to +65°C) and high vibration, while UL E207685 certification allows installation in Class I, Division 2 hazardous areas.、

The controller communicates with I/O modules via IONet, GE’s proprietary industrial Ethernet protocol optimized for low-latency data exchange in distributed control systems.

Within the Mark VIeS ecosystem, the IS420UCSBS1A acts as a standalone computing platform, eliminating the need for a backplane and ensuring no single point of failure.

Its flash memory supports field-upgradable firmware, while USB 1.1 connectivity enables easy configuration and diagnostics. Compliance with IEC 61010 and IEEE 802.3 standards underscores its reliability in regulated industrial settings.

Technical Specifications

Parameter Name    Parameter Value

Product Model    IS420UCSBS1A

Manufacturer    GE

Product Type    Safety Controller Module

Series    Mark VIeS Speedtronic™

Processor    Intel EP80579 600 MHz

Operating System    QNX Neutrino Real-Time OS

Power Supply    28V DC (±2.1%, 27.4–28.6V)

Power Consumption    15.6W nominal / 26.7W peak

Physical Dimensions    42 mm (W) × 204 mm (H) × 5 mm (D) (mounting bracket)

Weight    1 kg

Operating Temperature    -30°C to +65°C

Humidity    5–95% non-condensing

Mounting Type    Panel-mounted (DIN rail optional)

Compliance    UL E207685. IEC 61508 (SIL 2/3), IEC 61010

Communication    IONet (10/100Base-TX), USB 1.1

Certifications    Class I, Division 2. Group IIC (hazardous area)

Standalone Architecture: Unlike traditional controllers, the IS420UCSBS1A does not rely on a backplane, ensuring no loss of input data during maintenance.

 This design allows hot-swappable replacements without disrupting critical processes, a key advantage in 24/7 operations like power generation.