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SPECIFICATIONS:
Part Number: IS220TUBRH2AAA
Manufacturer: General Electric
Series: Mark VIe
Product Type: Vibration Monitor Board
Sensor Inputs: 14
Analog Output: 4-20 mA
Power Supply: +28 VDC
Repair: 3-7 Days
Availability: In Stock
Country of Origin: United States
Manual: GEH-6721D
FUNCTIONAL DESCRIPTION:
IS220TUBRH2AAA is a 125 V DC Power Distribution Module manufactured and designed by General Electric as part of the Mark VIe Series used in GE Distributed Control Systems. It accepts inputs from up to 14 sensors, including eight vibration/position sensors, four position-only sensors, and two reference probe/position sensors. Incoming signals are conditioned through amplification and filtering circuits to ensure accurate measurement. The board performs real-time analysis of vibration amplitude, shaft displacement, axial vibration, and radial vibration, comparing these signals against pre-configured trip and alert thresholds. It provides discrete alarm and trip outputs to the turbine protection system and analog outputs proportional to vibration levels for monitoring and control purposes. Communication with the turbine control system is achieved via IONet or Unit Data Highway (UDH), and the board supports both Simplex and Triple Modular Redundant (TMR) configurations. Operating on a +28 VDC power supply, the board incorporates self-diagnostics to detect sensor faults, signal integrity issues, and internal failures, enabling predictive maintenance and ensuring safe turbine operation.
COMPATIBILITY:
It supports both Simplex and Triple Modular Redundant (TMR) configurations. The board interfaces with I/O processors, analog/digital interface modules, and vibration sensors, including proximity probes, accelerometers, and reference probes. Communication is supported via IONet and Unit Data Highway (UDH) protocols. The board operates on a +28 VDC power supply and is fully backward compatible with previous VAIC generation boards, enabling seamless system upgrades or replacements without modification.
INSTALLATION:
It is installed in the designated Mark VIe control rack slot, secured with card guides and captive fasteners to ensure proper backplane connection. Sensor wiring from proximity probes, accelerometers, and reference probes is terminated on the board’s sub-D connectors and terminal strips according to the system wiring diagram, with shielded twisted pairs required and shields grounded at a single point. The board operates from the system’s regulated +28 VDC backplane supply, requiring no negative voltage. Communication links are established through IONet or Unit Data Highway (UDH) ports using specified cables. For Simplex operation, one board is fitted, while TMR configurations require three synchronized boards in parallel slots. After installation, system diagnostics must be executed to verify power status, communication integrity, and sensor channel functionality.
WOC offers the largest inventory of OEM replacement parts for GE Distributed Control Systems, ensuring that you have access to high-quality, reliable components when you need them most. In addition to supplying unused OEM parts, we also provide repaired and rebuilt boards, all backed by a warranty for your peace of mind. Our experienced team of automation experts is available 24/7 to assist with any OEM-related requirements, from troubleshooting and repairs to recommending the right replacement parts. Whether you need support for urgent system repairs or routine maintenance, WOC is committed to delivering fast, dependable solutions tailored to your needs. For detailed pricing, availability, or technical assistance regarding parts and repairs, please reach out to our team via phone or email, and we will be happy to provide prompt support.
What is the primary function of the board?
The board monitors vibration and shaft position signals from rotating machinery. It processes these signals in real time and compares them with configured thresholds. Based on results, it provides alarms or trip outputs to protect the turbine system.
How many sensor channels are supported?
It supports 14 input channels in total. This includes eight vibration/position channels, four position-only channels, and two reference probe inputs. The multi-channel design allowssimultaneous monitoring of multiple vibration points.
What type of sensors are compatible?
The board is designed to interface with proximity probes, accelerometers, and reference probes. These sensors provide displacement, velocity, and reference phase information. The inputs are conditioned internally for precise measurement and analysis.
What is the required power supply?
The board operates from a +28 VDC regulated supply. Current draw is typically around 1.5 A, depending on the connected sensor load. No negative voltage supply is required for operation.
