IS200TPYRH1A - Pyrometer Input Terminal Board

SPECIFICATIONS

Part Number: IS200TPYRH1A
Manufacturer: General Electric
Series: Mark VI
Function: Pyrometer Terminal Board
Availability: In Stock
Size: 313 in. x 7 in.
Technology: Surface mount
Temperature: -30 to 65oC
MPU pulse rate range: 2 Hz to 20 kHz
Number of outputs: 2 trip contacts
MPU input circuit sensitivity: 27 mV pk
Country of Manufacture: United States (USA)

Functional Description

IS200TPYRH1A is a Pyrometer Terminal Board developed by General Electric. It is a part of the Mark VI Control System. It serves as the field wiring interface for infrared temperature measurement and shaft reference signals, enabling precise turbine monitoring and protection. The TPYR terminal board supports both simplex and Triple Modular Redundant (TMR) system architectures, ensuring flexibility and high reliability in critical turbine applications.

Pyrometer and KeyPhasor Signal Interface

• The TPYR terminal board is designed to interface with two infrared TBTMS thermometers, commonly referred to as optical pyrometers, and two KeyPhasor proximitor probes used for shaft rotational reference. Together, these devices generate a total of 10 voltage signals, which represent real-time turbine temperature and shaft position data.
• These signals are routed from the TPYR terminal board to the VPYR I/O board, where they are sampled at extremely high speeds of up to 200,000 samples per second. This high sampling rate allows for accurate temperature profiling and precise rotational timing, which are essential for advanced turbine monitoring and protection strategies.

Simplex and TMR Connectivity

• The terminal board supports both simplex and TMR configurations, making it suitable for a wide range of control system designs. The board is equipped with three DC-37 connectors that provide connectivity to the Mark VI I/O boards.
• In simplex applications, signal connections are made through a single connector (JR1).
• In TMR applications, all three connectors (JR1, JS1, and JT1) are used, and the input signals are internally fanned out to the R, S, and T control paths.
• Connections can be established using interconnecting cables or by directly mounting the I/O packs, offering installation flexibility depending on cabinet layout and system requirements.

Compatibility with Mark VI and Mark VIe Systems

The TPYR terminal board is compatible with both Mark VI and Mark VIe control systems. In both platforms, it performs the same core function of signal termination, conditioning, and distribution for pyrometer and KeyPhasor inputs. This backward and forward compatibility allows TPYR boards to be used in system upgrades, retrofits, and long-term maintenance strategies.

Installation and Wiring Arrangement

• Installation is designed to be straightforward and service-friendly. All field signals are wired directly to two removable I/O terminal blocks, each secured with two retaining screws. Each terminal block provides 24 terminals and supports wire sizes up to #12 AWG, accommodating a wide range of field cabling standards.
• A shield termination strip, bonded to chassis ground, is positioned immediately to the left of each terminal block. This grounding arrangement ensures effective noise suppression and signal integrity, which is particularly important for low-level voltage signals from pyrometers and proximitor probes.
  • The first terminal block is used for connecting the two optical pyrometers.
  • The second terminal block is used for wiring the two KeyPhasor probes.
• The required 28 V DC sensor power is supplied from the I/O boards through the JR1, JS1, and JT1 connectors, eliminating the need for external power wiring.

Diagnostic and Fault Monitoring Capabilities

• The TPYR terminal board includes comprehensive diagnostic support to ensure reliable operation and early fault detection. The control system performs continuous limit checking on both the temperature input signals and the KeyPhasor gap signals. Any signal exceeding predefined thresholds can trigger diagnostic faults.
• If one or more input signals become unhealthy, a composite diagnostic alarm—either L3DIAG_VPYR or L3DIAG_PPYR—is generated. Individual diagnostic alarms can be latched and later reset using the RESET_DIA signal once the signals return to normal operating conditions.

Connector Identification and Hardware Verification

Each of the TPYR terminal board connectors—JR1, JS1, and JT1—is equipped with a dedicated identification (ID) device. This read-only chip stores critical information, including:

• Terminal board serial number
• Board type
• Revision level
• Connector plug location

The I/O board interrogates this ID device during system initialization. If any mismatch or incompatibility is detected, the system generates a hardware incompatibility fault, preventing incorrect board installation and ensuring overall system integrity.

WOC is happy to assist you with any of your automation requirements. For pricing and availability on any parts and repairs contact us.

FREQUENTLY ASKED QUESTIONS

What is IS200TPYRH1A?
It is a Pyrometer Terminal Board manufactured and designed by General Electric.

What is the main function of the TPYR terminal board?
The terminal board connects two optical pyrometers and two KeyPhasor proximitor probes to the Mark VI I/O system. It distributes the resulting voltage signals to the VPYR I/O board, enabling high-speed sampling and accurate turbine monitoring.

How many signals does the TPYR board handle?
The terminal board handles a total of 10 voltage signals, generated from the two infrared pyrometers and two KeyPhasor probes.

What sampling rate is supported by the connected I/O board?
When connected to the VPYR I/O board, the input signals are sampled at rates of up to 200,000 samples per second, ensuring high-resolution temperature and shaft position data.