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SPECIFICATIONS:
Part Number: IS220PPROH1A, REV C
Manufacturer: General Electric
Series: Mark VIe
Product Type: Backup Turbine Protection I/O Module
Supported Boards: SPRO, TREA, TREG, TREL, TRES
System Architecture: TMR (with TREA), Simplex (with SPRO)
Connectivity: DC-37 pin cable
Communication Ports: 2
Module Connector: DC-62 pin
Number of Modules: 1
Size: 33.0 cm high x 17.8 cm
Repair: 3-7 Days
Availability: In Stock
Country of Origin: United States
Manual: GEH-6721D
FUNCTIONAL DESCRIPTION:
IS220PPROH1A, REV C is a Backup Turbine Protection I/O Module manufactured and designed by General Electric as part of the Mark VIe Series, which is used in GE Distributed Turbine Control Systems. The Backup Turbine Protection I/O Module and its associated terminal boards form a critical component of the turbine control system, providing an independent backup overspeed protection mechanism. In addition to overspeed protection, the PPRO system also performs a redundant synchronization check for the generator when connecting to a utility bus, ensuring safe and reliable system operation. Another important feature of the PPRO is its independent watchdog function, which continuously monitors the primary control system and acts as a safeguard in the event of a malfunction.
A standard emergency protection architecture is typically built using three Triple Modular Redundant (TMR) PPRO I/O packs, each mounted on a separate Simplex Protection (SPRO) terminal board. This TMR configuration enhances system reliability by allowing the control logic to vote between multiple signals, reducing the possibility of false trips or failures. Each SPRO terminal board is connected via a DC-37 pin cable to its designated Emergency Trip Terminal Board, which interfaces directly with the turbine trip mechanisms. Depending on the turbine application, one of the following trip boards is used:
A maximum of three trip solenoids can be connected between the primary and emergency trip terminal boards. Connecting a solenoid between the boards isolates the power on both sides of the solenoid, as well as visibility of the solenoid voltage as a system feedback. The primary/emergency trip boards TRPG/TREG, TRPL/TREL, and TRPS/TRES are designed to operate as a pair and use cabling between the boards for system connections. TRPA and TREA are designed with no pairing required and can be used independently of each other. When TRPA and TREA are paired, they function the same as other board pairs.
CONTROLLER COMPATIBILITY:
SIMPLEX MAIN CONTROL:
DUAL MAIN CONTROL:
Simplex backup protection is supported by the Mark VIe trip board TRES. When used in this configuration, the first network connection is to the R controller. The second network connection is to the S controller. PPRO is then responsible for monitoring the operation of both controllers. PPRO supports two options: The pack trips if either controller malfunctions or both controllers malfunction.
TMR backup protection is supported by all Mark VIe backup trip boards, TREG, TREL, TREA, and TRES. This configuration uses the dual controller TMR output standard network connection. The first PPRO pack has one network port connected to the R controller network. The second pack has one network port connected to the S controller network. The third pack has one network port connected to the R controller network and one network port connected to the S controller network. The third PPRO monitors the operation of both controllers. The pack trips if either controller malfunctions or both controllers malfunction.
INSTALLATION:
The PPRO module is designed for direct mounting onto either a Mark VIe SPRO terminal board or a TREA turbine emergency trip terminal board, depending on the application requirements. This direct integration allows the PPRO to establish a reliable connection with the emergency protection system while maintaining its independent backup functionality. When installed on an SPRO board, additional cabling is necessary to interface with the designated trip terminal board. These connections are made using DC-37 pin cables with connectors on both ends, ensuring secure signal transmission between the SPRO and the trip board.
OPERATION:
The processor board connects to an acquisition board specific to the I/O pack function. Upon application of input power, the soft-start circuit ramps up the voltage available on the processor board. The local power supplies are sequenced on, and the processor reset is removed. The processor completes self-test routines and then loads application code specific to the I/O pack type from flash memory. The application code reads board ID information to ensure the correct matching of application code, acquisition board, and terminal board. With a good match, the processor attempts to establish Ethernet communications, starting with a request for a network address. The address request uses the industry standard dynamic host configuration protocol (DHCP) and the unique identification read from the terminal board. After Ethernet initialization, the processor programs the on-board logic, runs the application, and enables the acquisition board to begin operation.
WOC maintains the largest inventory of OEM replacement parts for GE Distributed Turbine Control Systems, ensuring that you have access to the components you need when you need them. Whether you require unused parts, refurbished boards, or specialized components, our stock is carefully curated to meet the highest quality standards. In addition to supplying parts, we provide expert repair services for faulty or malfunctioning boards, with all repaired or rebuilt units backed by a reliable warranty, giving you complete confidence in the performance and longevity of your turbine control systems.
Our team of skilled professionals is available 24/7 to support your OEM requirements and ensure seamless operation of your automation systems. We are committed to providing responsive and knowledgeable assistance, whether you need guidance on part selection, troubleshooting, or repair solutions. For detailed information on pricing, availability, or specific service requests, please reach out to our team via phone or email, and we will be happy to provide prompt and personalized support tailored to your operational needs.
What type of connector is used between the PPRO and the terminal board?
The PPRO interfaces with the terminal board using a DC-62 pin connector. This ensures a secure and high-density electrical connection. Proper seating of this connector is essential for correct module operation.
How does the PPRO connect when used with an SPRO board?
When mounted on a SPRO, the PPRO requires a DC-37 pin cable to link the SPRO board to the designated trip terminal board (TREG, TREL, or TRES). Both ends of the cable must be securely fastened to maintain reliable signal transmission. Incorrect cable seating can lead to a protection malfunction.
How many PPRO modules can be installed on a TREA terminal board?
A TREA terminal board supports three PPRO modules simultaneously. This configuration provides Triple Modular Redundancy (TMR), where signals are validated through voting logic. Such redundancy significantly reduces the chance of false trips.
