IS200PTBAG1A - Protection Termination Module

TECHNICAL SPECIFICATIONS:

Part Number: IS200PTBAG1A
Manufacturer: General Electric (GE)
Series: Mark V LM
Functional Acronym: PTBA
Product Type: Protection Termination Module / Expansion Board
Terminal Block Design: Removable Barrier Type terminal blocks
Number of MPU Channels: 3 independent speed channels (R, S, T voting)
Flame Detector Interfacing: Up to 4 pulse-rate flame sensors
Solenoid Trip Outputs: 3 independent circuits (125 V DC nominal)
Synchronization Voltage Inputs: Up to 120 V AC nominal
Synchronization Frequency Range: 50 Hz / 60 Hz nominal systems
Module Compatibility: Integrates with PMVP Migration Modules and TCEB Boards
Core Monitoring Inputs: Magnetic speed pickups, flame detector pulses, trip solenoids
Synchronization Circuit Support: Generator breaker synchronization circuits (TCTE, TCTG, TCTL, TCTS)
Emergency Shutdown System: Integrated E-Stop loop lines
Backplane Interconnects: High-density ribbon cable connectors (JR1, JS1, JT1)
Circuit Protection Componentry: Onboard surge suppression, Metal Oxide Varistors (MOVs), and high-isolation optocouplers
Diagnostic Capabilities: Hardware loop continuity testing, open-circuit, and short-circuit detection
Operating Voltage: 24 V DC / 125 V DC system excitation fields
Storage Temperature Range: -40 �C to +85 �C
Relative Humidity: 5% to 95% non-condensing
Repair / Evaluation Lead Time: 3�5 Business Days
Availability: In Stock
Country of Origin: United States (USA)
Manual Reference: GEH-6721

FUNCTIONAL DESCRIPTION OF IS200PTBAG1A:

The IS200PTBAG1A is a Protection Termination Module designed and manufactured by General Electric as an expansion interface within the Speedtronic Mark V LM Control Systems. The Protection Termination Module (PTBA), located in the P1 core, terminates the signals for the P1 core. Input signals for the high and low pressure shaft speeds, flame detection, generator and bus voltages, and generator currents are landed on the PTBA terminal board and connected to the TCEB board in P1. These speed signals are also connected to the R1 core. The external trip input signals, generator and bus signals, and generator breaker signals are read by the PTBA terminal board and then written directly to the Turbine Trip (TCTG) board in the P1 core. Trip output signals and generator breaker close signals from the TCTG board are written to the unit via the PTBA terminal board. The audible alarm located on the TCEB board is powered using a hardware jumper on the PTBA board.

PTBA CONNECTORS

• JJR � Writes the speed signals for the high- and low-pressure shafts to the TCQE board in the R1 core.
• JM � Reads and writes the generator breaker signals (52GL) and writes the emergency trip outputs to/from the TCTG board in the P1 core.
• JN � Reads and writes the generator breaker signals (G125P), writes the enable signal to the horn, and reads the external trip signals to/from the TCTG board in the P1 core.
• JU � Writes the emergency overspeed signals, the flame detect signals, and the audible alarm (horn) enable signals to the TCEB board in the P core.
• JV � Writes the generator and bus voltage signals and the current signals (PT and CT) to the TCEB board in the P1 core.
• JVA � Carries the 335 V DC out to the flame detection devices from the TCEB board in the P1 core.

WHY BUY FROM WORLD OF CONTROLS:

World of Controls specializes in supplying high-quality, warranty-backed OEM replacement parts, including unused surplus and professionally rebuilt components for critical turbine control and industrial automation systems like the General Electric Mark VI and Mark VIe platforms. To minimize customer downtime and ensure original equipment standard compliance, every component undergoes rigorous inspection, testing, and verification in an advanced electronics lab. Beyond parts distribution, the company delivers comprehensive, global support through 24/7 technical assistance, expert troubleshooting, component repair services, and rapid shipping, ensuring optimal efficiency and long-term reliability for critical industrial operations worldwide.

FREQUENTLY ASKED QUESTIONS:

What is GE IS200PTBAG1A?

It is a Protection Termination Module expansion board manufactured by General Electric for Mark V to Mark VIe turbine control modernization paths. It lands and handles primary core protection signals.

What hardware filtering does the board use to eliminate contact bounce?

Every discrete input path features an inline RC electronic filter network that removes high-frequency transient noise and mechanical contact bounce before signals reach the digital backplane.

How does the module detect a broken field wire versus an open switch?

It utilizes a continuous diagnostic bias current loop. If the current drops below a specific leakage threshold when a contact is open, the system triggers a wire-break alarm.

How does the DTBA interface with the main Mark VIe processors?

It terminates raw field inputs and routes them via JQ/JR ribbon cables to TCDA or PMVD migration modules, which process and convert the data for the high-speed IONet network.

What protects the low-voltage processing logic from field surges?

The board layout maintains strict creepage and clearance distances across the substrate, creating a galvanic isolation barrier that prevents 125 V DC field excitation surges from reaching the logic core.
What is the maximum contact-wetting voltage the board can handle?
The internal traces and surface-mount resistors are rated to distribute up to a 125 V DC nominal excitation field, allowing it to clear oxide buildup on older mechanical field switches.