General Electric IS420UCSCS2A | Mark Vies Safety Controller

Overview

The IS420UCSCS2A is a dual-core safety controller designed for Mark VIeS Safety control applications, enabling SIL 2 and SIL 3 capabilities in functional safety loops. It is utilized in safety-instrumented systems (SIS) to help mitigate risks in critical safety functions.

Redundancy and Configuration

The IS420UCSCS2A supports various redundancy modes for increased reliability:

• Simplex: Single controller operation
• Dual: Two controllers operating in a redundant mode
• TMR (Triple Modular Redundant): Three controllers for critical redundancy

Technical Specifications

Processor and Memory

• Microprocessor: 1.6 GHz Dual-core AMD G-Series
• Memory: 2 GB DDR3-1066 SDRAM with error-correcting code (ECC)
• Storage: 128 GB Solid-State Drive (SSD)

I/O and Communications

• Ethernet Ports: 3 IONet ports (R/S/T) for I/O communication (Simplex, Dual, TMR)
• ENET 1: EGD/UDH communication for ToolboxST PC, HMIs, Gateway controller, and GE PACSystems products
• Modbus TCP: Slave mode (Read-only)
• Black Channel Communication: Supported between multiple Mark VIeS controllers

Health and Status Indicators

The IS420UCSCS2A includes multiple diagnostic and status LEDs for real-time monitoring:

• Power
• Boot
• Online
• Ethernet Link and Activity
• Diagnostic LEDs

Power and Connectivity

Input Power

• Voltage Range: 18 to 30 V dc
• Nominal: 28 V dc
• Maximum Power: 30.8 W

Input Power Connector

• Phoenix® Contact (MC 1,5 / 3-STF-3,81)

Programming and Control Logic

The IS420UCSCS2A offers several programming options, providing flexibility in control logic design:

• Function Block Diagram (FBD)
• Relay Ladder Diagram (RLD)
• Cause and Effect Matrix

Control logic execution can be configured with the following frame rates:

• 10 ms, 40 ms, 80 ms, 160 ms (Synchronization supported across Dual and TMR configurations)

Environmental Requirements

Temperature

• Operating Range: -40°C to 70°C (-40°F to 158°F)
• Storage Range: -40°C to 85°C (-40°F to 185°F)

Humidity

• Non-condensing: 95% maximum humidity

Hazardous Location Compliance

• Class 1, Div 2 / Class 2, Zone 2 / ATEX certified
  

Dimensions and Mounting

The IS420UCSCS2A is designed for compact installation:

• Dimensions (H x W x D):

  • Without Mounting Base: 168 x 150 x 55 mm (6.6 x 5.9 x 2.2 in)
  • With Mounting Base: 204 x 152 x 55 mm (8.0 x 6.0 x 2.2 in)

• Weight: 1,327 g (46.8 oz)

• Mounting: Base-mounted

Cooling and Thermal Management

• Cooling Method: Convection
• Ambient Temperature: Must be at least 25 mm (0.98 in) from any point on the UCSC for proper cooling

Additional Features and Compliance

• G3 Compliant: Yes, ensuring the controller meets high industrial standards for functionality and reliability