Configured for safety loop execution in Mark VIeS distributed control systems, the GE IS420UCSCS2A, also cataloged as the IS420UCSCS2A Dual Core Controller Module, provides deterministic hardware execution for SIL 2/3 certified applications under IEC 61508 compliance.
Hardware Specifications
Model: IS420UCSCS2A
Brand: General Electric
Origin: United States
Weight: 1,327 g
Dimensions: 168 x 150 x 55 mm
Operating Temp: -40 to 70 deg C
Power Consumption: 28 VDC nominal, 18-32 VDC range
Microprocessor: Dual core AMD G-Series, 1.6 GHz
Memory: 2 GB DDR3-1066 SDRAM
Storage: 128 GB
Mounting: DIN-rail
Redundancy: Simplex, Dual, TMR
Span: -8 mV to +45 mV
Operating System: QNX Neutrino
Manual: GEI-100867A
Firmware Flash Compatibility
The IS420UCSCS2A integrates firmware flash compatibility across ControlST V07.02 and later. Backplane bus communication velocity licenses are preserved during flash cycles, ensuring deterministic execution. Firmware updates are validated against IEC 61508 standards, preventing unsafe transitions during redundancy switchovers.
Frequently Asked Questions
Q: Can the IS420UCSCS2A be replaced under live power conditions? A: No. The module requires full de-energization before removal or insertion to avoid bus disruption.
Q: What is the redundancy switch-over delay in TMR mode? A: The controller executes deterministic failover within one execution cycle, maintaining continuity of safety functions.
Q: Does the controller support earlier ControlST versions? A: No. It requires ControlST V07.02 or later to enable dual-core execution and SIL 3 safety loops.
Field Installation Guidelines
Ensure DIN-rail mounting stability with full mechanical engagement.
Ground shielded cables at a single point to suppress EMI.
Route power supply wiring separately from signal lines to minimize cross-talk.
Verify redundancy configuration (Simplex, Dual, TMR) before energizing.
Observe ambient temperature limits (-40 to 70 deg C) during installation.
