Description
The IS420UCSBH4A-UCSB controller module is in stock and will be shipped on the same day.
The IS420UCSBH4A-UCSB controller module is in an unused and rebuilt state.
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IS420UCSBH4A Other names:
Control unit IS420UCSBH4A
IS420UCSBH4A Analog Input Output Controller
Communication controller IS420UCSBH4A
Product Description
The IS420UCSBH4A controller is the first UCSB controller in the Mark VIe Control Safety System series manufactured by General Electric. This controller is similar to the UCSC controller, although the hardware is different, the software required to operate this controller is almost the same. According to the GEH-6725 Mark VIe and Mark VIeS, Control Equipment Hazardous Area Use Guidelines, the IS420UCSBH4A controller is labeled as a Mark VIe, LS2100e, and EX2100e controller. The controller also uses a specific microprocessor, and the microprocessor installed in the device is a 600 MHz EP80579 Intel processor.
On page 22 of the GEH-6725 user manual, there is a small table indicating the electrical/power ratings required to power IS420UCSBH4A. The ratings are as follows: minimum voltage is 18 volts DC, maximum DC is 30 volts, and nominal power ratings are 24 volts and 28 volts DC. The maximum current rating used by this device is 1.5 ADC.
When installing, installing the IS420UCSBH4A controller in hazardous and non hazardous locations requires multiple certifications. For example, when installed in ATEX Zone 2, IIC group, the required certification is UL DEMKO 12 ATEX 1114875X. All certifications for controllers installed in Class I, Zone 2, Group IIC, non hazardous and Class I, Zone 2, Groups A, B, C, and D are the same, and the certification requirements for these locations are UL E207685.
IS420UCSBH4A is a UCSB controller module developed by GE. The UCSB controller is an independent computer that can execute application specific control system logic. Unlike traditional controllers, UCSB controllers do not host any application I/O. In addition, all I/O networks are connected to each controller, providing it with all input data. If the controller loses power due to maintenance or repair, the hardware and software architecture ensures that no application input points are lost.
Surgery
The controller is pre installed with specialized software. It can run steps or blocks. No need to restart the system to make minor changes to the control software online.
The IEEE 1588 protocol is used to synchronize the clock of I/O packets and controllers to within 100 microseconds through R, S, and T IONets. External data is transmitted to or from the control system database of the controller through R, S, and T IONets. This includes the process inputs and outputs of the I/O module.
This also includes the following in the dual system:
Specify the internal state values and initialization information of the controller
Status and synchronization information from two controllers
This also includes the following in Triple Modular Redundancy (TMR) systems:
Internal state values for voting and status, as well as synchronization information from all three controllers
Data from the specified controller for initialization
IS420UCSBH4A Advantages
The UCSB controller has the following advantages:
Single module
Built in power supply
No need for jumper settings
No battery
No fans
Smaller panel size
Flash memory can be easily updated
The UCSB controller is installed in the panel and communicates with the I/O package through the onboard I/O network (IONet) interface. IONet is a dedicated Ethernet that only supports Mark controlled I/O modules and controllers.
Features
Microprocessor: 600 MHz Intel EP80579
Memory: 256 MB DDR2 SDRAM with Error Correction Code (ECC), SRAM supported by flash memory, NAND flash memory size of 2 GB
Operating system: QNX Neutrino
Weight: 2.4 pounds
Installation
The UCSB controller is installed in a separate module that is directly connected to the panel metal plate.
The UCSB controller should be installed on a heat sink panel that allows vertical air circulation.
Comment on IS420UCSBH4A
Internal review
The IS420UCSBH4A controller is a highly reliable and versatile module due to its long lifespan and compatibility with EX2100e, LS2100e, and Mark VI systems. Its failure rate is very low and is related to most defects, which can be repaired
Frequently asked questions
What is IS420UCSBH4A?
IS420UCSBH4A is a UCSB controller module developed by GE
What is the weight of this component?
This component weighs approximately 2.4 pounds
How to obtain the spare parts for this product?
Please call the Industrial Control Sales Consultant: Carrey
WhatsApp:+86 18030177759
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The specific customer service quotation shall prevail, as the product is a new product and the price is not genuine,
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admin –
When installing, installing the IS420UCSBH4A controller in hazardous and non hazardous locations requires multiple certifications. For example, when installed in ATEX Zone 2, IIC group, the required certification is UL DEMKO 12 ATEX 1114875X. All certifications for controllers installed in Class I, Zone 2, Group IIC, non hazardous and Class I, Zone 2, Groups A, B, C, and D are the same, and the certification requirements for these locations are UL E207685.
fdertol mrtokev –
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admin –
I. Hardware Core Parameters
Processor: Intel EP80579, 1066MHz
Memory: 256MB DDR2 ECC Error Correcting Memory
Storage: Onboard NAND Flash, no built-in battery design
Operating System: QNX Neutrino Hard Real-Time Operating System
Power Supply: DC24V; Typical TDP 17.3W, Peak 28.7W
Cooling: Passive finned cooling, fanless structure
Operating Temperature: -30℃ ~ +65℃
Certifications: UL Class I Div.2, CE, meeting the requirements for use in hazardous areas of power plants
Front Side 5 RJ45 Interface Definitions (from top to bottom)
IONet A: Redundant I/O Network A, connecting IS220 series I/O cards
IONet B: Redundant I/O Network B
ECN A (NET1): External Control Network A, connecting HMI and engineering workstations
ECN B(NET2): External Control Network
SERV: Local Debugging Port, ToolboxST Program Download, Fault Diagnosis
Architectural Features: Distributed I/O architecture, no backplane I/O, controllers and I/O modules are networked remotely via network cables.
II. Core Functions
**Unit Control Logic Operation Center:** Executes turbine/gas turbine speed regulation, load control, sequential control, fuel regulation, and OPC shutdown interlocking; compatible with EX2100e excitation system.
**TMR Triple Redundancy Control:** Three IS420UCSBH4A controllers in the cabinet operate in parallel, using a 2-out-of-3 voting method; single controller failure can be hot-replaced online without causing unit disturbance.
**IONet Network Management:** Polls and collects data from all remote I/O (including IS220PPRAS1B overspeed protection card), issues output commands, and continuously diagnoses I/O disconnections and hardware faults.
Event SOE, Trend Acquisition, Alarm Management
External Communication: SRTP, Modbus TCP, enabling data interaction with the plant-level DCS
Complete Hardware Self-Diagnosis: CPU, memory, network link, flash memory health monitoring, fault codes sent to HMI
III. Model Version Differentiation & Spare Parts Interchangeability (Key Maintenance Focus)
UCSB Series Hardware Lineage:
IS420UCSBH1A / H3A: Early 600MHz version, lower computing power
IS420UCSBH4A: 1066MHz enhanced version, mainstream model for large-scale combined cycle, multi-point I/O projects
Suffix Iterations: H4A / H4B / H4C, minor hardware modifications, generally interchangeable within the same project
⚠️ Key Limitations
H4A can be backward compatible with H1A/H3A, but must match the corresponding ToolboxST firmware version. Directly using it will easily result in a Hardware Mismatch report.
UCSB ≠ UCSE (IS420UCSExxxx) hardware slots and firmware are not interchangeable; mixing is strictly prohibited.
Before powering on new spare parts, verify the hardware version and image version. Ensure the firmware versions of the three TMR controllers are consistent.
IV. System Hierarchy (Based on your query for IS220PPRAS1B)
Three IS420UCSBH4A units (TMR main controller, regulation control)
↕ IONet A/B dual redundant network cable
Three IS220PPRAS1B units (TMR overspeed protection I/O, MPU speed acquisition, hardware backup shutdown) logically layered: UCSB enables normal unit regulation; PPRA I/O constitutes independent hardware-level overspeed protection, forming a dual-layer protection system of regulation system + independent safety protection. V. Common Typical Fault Phenomena SERV/IONet indicator light flashing abnormally: Network cable fault, IS420ESWBHxx switch fault. Controller Fault constantly lit: Firmware version mismatch, ECC memory error, Flash damage. I/O Comm Loss: Communication loss with IS220PPRAS1B, check IONet link, TREA terminal board. TMR out of sync: Firmware inconsistency among the three controllers, clock synchronization abnormality. VI. Typical Application Scenarios 9E/9F/9HA Heavy-duty gas turbine, steam turbine, combined cycle generator set main control EX2100e excitation control system main control unit Mark VIeS SIL2/SIL3 safety-related control scheme.
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