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The IS420UCSBH3A is a high‑performance controller module designed for the Mark VIe / Mark VIeS series control systems used in turbines, power generation equipment, and industrial automation. It serves as a central processing unit executing control logic, managing I/O networks, and providing high‑reliability performance under challenging conditions. With its rugged, fan‑less design and modern microprocessor architecture, this module supports real‑time control, diagnostics and system integration for gas, steam and wind turbines as well as other large rotating machinery and process plants.
Belonging to the “Universal Control System Block (UCSB)” family, the IS420UCSBH3A supports scalable redundancy configurations, high speed Ethernet/IONet communication, and is built for mission‑critical environments requiring high uptime and robust performance.
| Parameter | Specification |
|---|---|
| Model | IS420UCSBH3A |
| Brand | GE Fanuc / General Electric |
| Series | Mark VIe / Mark VIeS – UCSB Controller Module |
| Processor | 1.2 GHz Intel EP80579 (or equivalent) |
| Memory | 1 GB DDR3 RAM + 2 GB Flash (typical) |
| Power Supply Input | 24/28 V DC nominal |
| Operating Temperature | 0 °C to +65 °C (extended versions down to ‑40 °C) |
| Storage Temperature | ‑40 °C to +85 °C |
| Dimensions (H × W × D) | ~163 mm × 206 mm × 35.6 mm (~6.4″ × 8.1″ × 1.4″) |
| Weight | ~1.3 kg (~2.9 lb) |
| Wire Size Supported | 28 to 16 AWG (for terminal wiring) |
| Mounting Type | Panel‑mount (DIN rail optional) |
| Certifications | SIL 2/3 capable, ATEX zone 2 compatible (depending variant) |
| Typical Features | Real‑time control logic, IONet communication, diagnostics LEDs: ON, DC, OT, ONL |
The IS420UCSBH3A controller module finds application in:
Gas turbines, steam turbines and wind turbines where the Mark VIe control system is employed.
Power‑generation plants requiring sophisticated control logic, safety instrumented systems (SIS), speed‑to‑synchronisation control, and rotor protection.
Industrial process plants (petrochemical, oil & gas, large‑scale manufacturing) where centralised automation controllers manage complex I/O and execute high‑speed control loops.
Retrofit projects replacing older control modules in legacy control racks to enhance performance, diagnostics and reliability.
Critical mechanical systems such as compressors, large pumps and turbine drives where reliability, redundancy and real‑time control are essential.
High computational performance: The 1.2 GHz Intel‑class processor allows execution of complex control logic, predictive diagnostics and real‑time data handling.
Rugged and reliable design: Fanless cooling, no batteries or jumpers required, capable of extended temperature and vibration environments.
Compact size and moderate weight: At ~1.3 kg and a shallow depth of ~35.6 mm, it integrates easily in rack systems with minimal space overhead.
Flexibility in mounting and wiring: Supports panel or DIN‑rail mounting, handles wire sizes 28‑16 AWG, simplifying installation.
Compatibility and scalability: Works with Mark VIe/VIeS platforms, supports redundancy configurations (simplex, dual, triple), and integrates with IONet networks.
Advanced diagnostics and status monitoring: Front‑panel LEDs (DC, ONL, OT) provide status feedback; built‑in diagnostic capabilities reduce downtime.
Reduced maintenance requirements: Fanless and no battery design significantly lowers ongoing maintenance cost and risk of failure points.
Brand: GE Fanuc / General Electric
Series: Mark VIe / Mark VIeS (UCSB Controller Module)
The Mark VIe/VIeS series is a successor to earlier Speedtronic and Mark V control systems, providing modular, scalable control solutions for turbines and large‑scale industrial automation. The UCSB (Universal Control System Block) modules represent the core controller units within this family.
| Model | Type | Description | Key Spec(s) |
|---|---|---|---|
| IS420UCSBH1A | Controller Module | Earlier variant in the UCSB family | Similar footprint, weight ~0.9 kg |
| IS420UCSCH1B | Controller Module | High‑performance “CH” variant for Mark VIe | Multi‑core CPU, expanded I/O |
| IS420ESWBH3A | Ethernet Switch Module | Networking blade compatible with Mark VIe systems | Multiple 10/100BASE‑TX ports, weight ~0.45 kg |
| IS420UCSBS1A | Safety‑rated Controller Module | For safety instrumented system (SIS) applications | SIL 3 capable |
| IS421UCSBH3A | Controller Module (32‑bit variant) | Alternate variant with conformal coating for harsh environments | Similar footprint, weight ~1.3 kg |
| Model | Series | Type | Key Specification |
|---|---|---|---|
| IC697CPG302 | PACSystems | CPU Controller Module | High‑performance PAC controller |
| IC694CHS392 | ControlLogix | High‑Speed Encoder Module | Motion‑control interface |
| RX3i MT4200 | RX3i Series | Motor Control Module | Drives large industrial motors |
| IS220AIIBH2A | Mark VIe | Analog Input Module | For turbine or generator analog signal capture |
| IS421UCSBS1A | Mark VIeS | Safety Controller Module | Safety certified (SIL 3) controller |
Q1: What is the purpose of the IS420UCSBH3A module?
A1: It acts as a controller module in the Mark VIe/VIeS system, executing control logic, managing I/O networks and controlling turbines or large process machines.
Q2: What power supply does it use?
A2: The module uses 24/28 V DC nominal input power.
Q3: What are its physical dimensions and weight?
A3: Dimensions are approximately 163 mm (H) × 206 mm (W) × 35.6 mm (D); weight around 1.3 kg.
Q4: What is the operating temperature range?
A4: The standard range is 0 °C to +65 °C; some variants support down to ‑40 °C.
Q5: What mounting options are supported?
A5: It is panel‑mountable; DIN‑rail mounting may also be supported depending on the rack installation.
Q6: Is the module suitable for redundancy configurations?
A6: Yes, it supports simplex, dual (hot standby) or triple redundancy within the Mark VIe architecture.
Q7: Does it require a cooling fan or battery?
A7: No – it is designed without a cooling fan or battery, reducing maintenance and failure points.
Q8: What applications is it most suitable for?
A8: Gas turbines, steam turbines, wind turbines, power‑generation control systems, and other critical industrial automation tasks.
Q9: What wiring sizes are supported?
A9: The terminal wiring supports wire sizes from AWG 28 to AWG 16.
Q10: How is its reliability and ruggedness?
A10: The module uses a rugged fanless design, supports extended temperatures, and integrates diagnostics for high‑availability industrial use.
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