GE Mark VIe IS420UCSCS2A Dual Core Controller Module

Product Overview

The GE IS420UCSCS2A is a Mark VIeS Functional Safety UCSC Controller designed for safety-instrumented system (SIS) applications. It is a compact, stand-alone dual-core controller that runs safety control applications to achieve SIL 2 and SIL 3 capabilities per IEC 61508 certification. The controller operates on QNX Neutrino real-time multitasking OS and supports simplex, dual, and TMR redundancy configurations.

Key Technical Specifications

• Processor: 1.6 GHz AMD G-Series dual-core microprocessor
• Memory: 2 GB DDR3-1066 SDRAM
• Storage: 128 GB flash memory (solid-state drive)
• Power Supply: 28 V DC nominal (18–32 VDC range)
• Operating Temperature: -40°C to +70°C
• Dimensions: 168 × 150 × 55 mm
• Weight: 1.3 kg
• Mounting: Standard DIN rail, base-mounted

Communication Interfaces

• 3× IONet ports (R/S/T) — I/O module communications (simplex/dual/TMR)
• ENET 1 — EGD/UDH communications to ToolboxST PC, HMIs, gateway controllers
• Modbus TCP Slave (read-only)
• Black Channel communication between Mark VIeS Safety controllers
• PROFINET and HSSL support

Programming & Configuration

• ControlST V07.02 and later versions
• ToolboxST software configuration — no hardware jumpers required
• Function Block Diagram (FBD), Relay Ladder Diagram (RLD), Cause and Effect Matrix

Safety & Thermal Protection

• Internal warning at 85°C; shutdown at 95°C (auto-reboot below 75°C)
• Microprocessor warning at 105°C; shutdown at 107°C (requires power cycle)
• No battery, no fan, no hardware jumpers — reduced failure points

Integration Capability

The IS420UCSCS2A interfaces with non-safety Mark VIe controllers (e.g., IS420UCSCH1B) via EGD protocol on UDH Ethernet. The non-safety controller can serve as a gateway for OPC UA Server or Modbus Master feedback signals.

Applications

• Gas and steam turbine safety control
• Wind turbine protection systems
• Combined-cycle power plants
• Emergency shutdown systems (ESD)
• Fire and gas detection systems

Installation Guide

1. Mount on standard DIN rail in a clean, well-ventilated panel
2. Connect 28 V DC power supply within 18–32 VDC range
3. Connect I/O modules via on-board IONet interfaces
4. For dual/TMR: install multiple controllers per redundancy plan
5. Configure all settings via ToolboxST — no jumpers needed
6. Download application logic and verify via diagnostic LEDs

FAQ

Q: What software version supports the IS420UCSCS2A?
A: ControlST V07.02 and later versions.

Q: Can this controller be used in TMR safety systems?
A: Yes. It supports simplex, dual, and TMR redundancy configurations.

Q: Does it require batteries or fans?
A: No. The UCSC design eliminates both, reducing maintenance and failure points.

Q: What happens at 95°C internal temperature?
A: The controller shuts down to protect electronics and auto-reboots once temperature drops below 75°C.

Q: Can it communicate with non-safety controllers?
A: Yes, via EGD protocol on UDH Ethernet to controllers like IS420UCSCH1B for OPC UA or Modbus gateway functions.

Model Selection Tips

• Choose IS420UCSCS2A for SIL 2/SIL 3 safety loops requiring certified functional safety
• Use IS420UCSCH1B as a non-safety gateway for mixed safety/standard control architectures
• Verify ControlST software version compatibility before ordering
• Confirm redundancy requirements (simplex/dual/TMR) for your SIS design