The IS220PPROS1B serves as a dedicated emergency protection device within the GE Mark VIe distributed control system. It provides backup overspeed protection for turbines. Additionally, this pack includes a backup check for generator synchronization to a utility bus. The module also functions as an independent watchdog for the primary control system. Therefore, you get two layers of protection for critical turbine operations.
A typical protection system uses three triple modular redundant (TMR) IS220PPROS1B packs. These three packs mount onto a single simplex protection (SPRO) terminal board. Each SPRO then connects to a designated emergency trip board using a DC-37 pin cable on both ends.
The IS220PPROS1B works with several emergency trip terminal boards. Specifically, it supports the following boards:
TREG – Gas Turbine Emergency Trip Terminal Board
TREL – Large Steam Turbine Emergency Trip Terminal Board
TRES – Small/Medium Steam Turbine Emergency Trip Terminal Board
TREA – Turbine Emergency Trip Terminal Board
Furthermore, you can use a single-board TMR protection configuration. In this alternative setup, three IS220PPROS1B packs work together without a separate SPRO board.
The IS220PPROS1B integrates primary and backup trip systems at the trip terminal board level. The primary protection comes from the Turbine Primary I/O pack (PTUR). PTUR uses a primary trip board such as TRPG, TRPL, TRPS, or TRPA. Meanwhile, the IS220PPROS1B operates a backup trip board. These backup boards include TREG, TREL, TRES, and TREA.
This pack can handle three different types of speed signals. For instance, it processes hardware-implemented overspeed signals. It also handles acceleration, deceleration, and basic overspeed detection. Moreover, the IS220PPROS1B monitors the primary control's performance. It can check the primary speed to confirm normal operation.
The IS220PPROS1B continuously tracks the status of the selected trip board. It uses a broad range of feedback signals for this monitoring. If the pack finds a fault, it will take immediate action. Specifically, it trips the backup trip relays on the trip board. Additionally, it initiates a trip on the primary control.
A key feature is complete independence. The principal control action has no bearing on the IS220PPROS1B. The pack operates entirely on its own. This independence ensures that protection remains active even if the main controller fails.
In a simplex backup protection configuration, the Mark VIe trip board TRES works with one IS220PPROS1B. The pack connects to the controller IONet through a single network port. All Mark VIe backup trip boards support TMR backup protection. These boards include TREG, TREL, TREA, and TRES. In TMR mode, each of the three IS220PPROS1B packs connects one port to the controller IONet.
The IS220PPROS1B also supports dual main control configurations. First, the pack connects to the R controller through the first network port. Then, it accesses the S controller through the second network connection. The pack then oversees the performance of both controllers. According to PPRO logic, the pack will trip if either controller fails. It also trips if both controllers fail simultaneously.
The IS220PPROS1B operates within a temperature range of -30 to 65°C. It requires a 24V dc power supply. The board measures 14.3 cm in height by 23.1 cm in width. Its weight is only 0.45 kg. GE manufactures this pack in the USA. For detailed instructions, refer to manual GEH-6721L.
The IS220PPROS1B shares a common processing board with other Mark VIe Ethernet I/O packs. This processing board includes several key components. For instance, it has a fast CPU with both flash memory and RAM. It also features two connectorized, fully independent 10/100 Ethernet ports. Additionally, the board includes a hardware reset circuit and a watchdog timer. An internal temperature sensor monitors thermal conditions. LED indicators display various status conditions. The pack can electronically read IDs from other boards. Finally, it includes an input power connector with current limiting and soft-start functionality. Local power supplies come with sequencing and monitoring capabilities.
First, mount the SPRO or TREA terminal board securely. If you use SPRO, also mount the chosen trip terminal board. Next, if you are not using TREA, connect a DC-37 pin cable between SPRO and the trip terminal board. Then, directly connect three IS220PPROS1B modules to TREA. Alternatively, connect one PPRO module to each SPRO.
After that, slide the threaded posts into the openings on the terminal board mounting bracket. These posts sit on either side of the Ethernet ports. Adjust the bracket position to ensure a tight fit between the DC-62 pin connector and the terminal board. Secure the mounting bracket firmly. Only one adjustment should be necessary during the product's lifetime. Finally, lock the IS220PPROS1B in place by tightening the nuts on the threaded posts.
Connect either one or two Ethernet cables depending on your machine setup. The pack automatically selects the appropriate operation over either port. It is not sensitive to which Ethernet connection you use. Then, connect the power connector located on the side of the module. The built-in soft-start feature regulates current levels during startup. Use the ToolboxST application to customize the module as needed.
When you apply input power, the soft-start circuit ramps up the voltage on the processor board. The local power supply turns on in sequence, and the processor reset turns off. After completing self-test routines, the processor loads application code from flash memory. This code is specific to the IS220PPROS1B pack type.
The application code then reads the board ID information. It verifies that the application code, acquisition board, and terminal board are correctly matched. When everything matches properly, the processor requests a network address. It then attempts to start Ethernet connections.
Both network pathways remain constantly active when you use two Ethernet inputs. A failure of either network will not hinder the IS220PPROS1B operation. The functioning network connection will reveal the failure. This configuration offers better fault tolerance than traditional hot-backup systems. In those older systems, the second port only activates when the primary port fails. The Ethernet ports automatically negotiate between half-duplex and full-duplex operation. Speeds range from 10 MB/s to 100 MB/s.
IS220PPROS1B emergency turbine protection I/O pack (1 unit)
Anti-static protective bag (1 piece)
Quick installation reference card (1 copy)
We ship the IS220PPROS1B using FedEx, UPS, or DHL. All shipments include tracking numbers and full insurance coverage. Typical delivery takes 3 to 7 business days depending on your destination country.
1. Can I use a single IS220PPROS1B pack instead of three TMR packs?
Yes, but only for simplex backup protection applications. For critical turbine protection, GE recommends using three TMR packs for redundancy and higher reliability.
2. What happens if both Ethernet networks fail on the IS220PPROS1B?
The pack loses communication with the controller IONet. However, the IS220PPROS1B will continue to monitor local trip conditions based on its last known configuration.
3. Which terminal boards are directly compatible with the IS220PPROS1B?
The IS220PPROS1B mounts directly onto SPRO or TREA terminal boards. Through SPRO, it works with TREG, TREL, TRES, and TREA via DC-37 cables.
4. How do I know if the pack has detected a fault?
The IS220PPROS1B will trip the backup trip relays on the trip board. Additionally, it will initiate a trip on the primary control. The status LEDs will also indicate a fault condition.
5. Does the IS220PPROS1B require any special firmware updates?
You can configure and update the pack using ToolboxST software. Always refer to manual GEH-6721L for the approved firmware versions compatible with your system.
| Brand Name | General Electric |
| Model No. | IS220PPROS1B |
| Product Type | I/O Pack |
| hasMerchantReturnPolicy | Adjust according to reality |
| Shippingdetails | Adjust according to reality |
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