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  • GE IS220PPDAH1A
  • GE IS220PPDAH1A
  • GE IS220PPDAH1A

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GE IS220PPRAS1A Emergency Turbine Protection Terminal Board

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  • Part Number: IS220PPRAS1A
  • Brand: General Electric
  • Type: Emergency Turbine Protection Terminal Board
  • Dimensions: 6x13x8.3cm
  • Country of Origin: USA
  • Barcode: 8537101190

Additional Specifications

Color / Pattern
  • Black
Power Source
  • DC-powered
Communication Protocols
  • Ethernet
Controller Design
  • Compact
Tags: DCS , Emergency Turbine Protection Terminal Board , Mark VIe

Product Description

GE IS220PPRAS1A Emergency Turbine Protection Terminal Board

The GE IS220PPRAS1A, also cataloged as the IS220PPRAS1A terminal board, serves as the primary hardware interface for backup Overspeed protection within Mark VIe turbine‑protection platforms. It supports PPRA I/O‑pack mounting, six‑speed signal routing, isolated trip‑contact handling, and Ethernet‑based IONet communication for independent watchdog functionality.

Hardware Specifications

Parameter Specification
Model IS220PPRAS1A
Brand GE
Origin USA
Weight Not specified
Dimensions 8.26 cm × 4.19 cm
Operating Temp -30 to 65 deg C
Power Consumption Not specified
Core Performance Indicators PPRA‑only terminal board; supports three PPRA packs; WREA option‑board interface; six‑speed input routing; isolated trip‑contact watchdog; Ethernet IONet communication; surface‑mount construction

Triple Modular Redundancy (TMR) 2oo3 Architecture

Within Mark VIe protection architectures, the PPRAS1A terminal board aligns with TMR Overspeed‑protection behavior by supporting three PPRA I/O packs mounted directly to the TREA board. Its fixed routing paths maintain deterministic propagation intervals for speed‑pair inputs and backup‑trip relay activation. Galvanic isolation between trip‑contact channels ensures stable operation under primary‑control failure conditions. Firmware flash compatibility resides at the PPRA pack level; the terminal board itself contains no programmable logic.

Frequently Asked Questions

Q: Can the IS220PPRAS1A operate with a single PPRA pack? A: No. Proper operation requires three PPRA I/O packs installed on a TREA board with a WREA option board.

Q: Does the board support Ethernet redundancy? A: PPRA packs provide dual 10/100 Ethernet ports; the terminal board itself is passive and selects appropriate operation based on PPRA logic.

Q: How does the board behave during primary‑control failure? A: Backup trip relays on the TREA board activate independently of primary control, driven by PPRA hardware‑implemented Overspeed logic.

Field Installation Guidelines

  • Mount the TREA terminal board securely before attaching PPRA packs.
  • Align threaded PPRA posts with bracket holes to ensure proper DC‑62 connector engagement.
  • Tighten mounting‑bracket hardware once; repeated adjustments are not required.
  • Route Ethernet cables without sharp bends; PPRA selects appropriate port automatically.
  • Verify power‑connector seating before energizing; PPRA packs include soft‑start current limiting.
  • Configure PPRA parameters using ToolboxST after installation.
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