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IS200DDPTH1A - Dynamic Pressure Transducer Terminal Board is available in stock which ships the same day.
IS200DDPTH1A - Dynamic Pressure Transducer Terminal Board comes in UNUSED as well as REBUILT condition.
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SPECIFICATIONS:
Part Number: IS200DDPTH1A
Manufacturer: General Electric
Series: Mark VI
Acoustic Channels: 2 Specialized Input Channels
Supported Transducers: Vibro-meter (CP216, CP231)
Excitation Output: �24 VDC
Output Signal: AC signal (�2 V peak) riding on DC bias
Wiring Specification: #18 AWG shielded twisted triplet
Terminal Blocks: Euro-block type with 42 termination points
Environmental Rating: Class 1, Division 2
Size: 8.26 cm high x 4.19 cm
Repair: 3-7 Days
Availability: In Stock
Weight: 2lbs 4oz
Country of Origin: United States
Manual: GEH-6421L
FUNCTIONAL DESCRIPTION:
IS200DDPTH1A is a Simplex Dynamic Pressure Transducer Input Terminal Board manufactured and designed by General Electric as part of the Mark VI Series used in GE Speedtronic Gas Turbine Control Systems. The DDPT is a compact acoustic terminal board for DIN-rail mounting. The board accepts two pressure transducers for monitoring pressure waves in gas turbine combustion chambers, using either Vibro-meter or Bently-Nevada transducers. It connects to the I/O board with two cables, and is designed to meet Class 1, Division 2 environmental requirements for hazardous gases.
INSTALLATION:
The DDPT board slides into a plastic holder, which mounts on the DIN-rail. The pressure transducers are wired to the permanently mounted Euro-Block type terminal block, which has 42 terminals. Typically, #18 AWG shielded twisted triplet wiring is used. There are ten screws for the SCOM (ground) connection. DDPT works with the VAMA I/O board. Cable connections from DDPT to the VAMA are made from JR1 to the J3 connector on the lower portion of the VME rack, and from JR5 to the J5 connector on the front panel of the VAMA. These are latching-type connectors to secure the cables.
OPERATION:
The I/O board supplies either positive 24 V dc or negative 24 V dc to the DDPT to power the pressure-sensing equipment. The third-party vendor equipment supported is the Vibro-meter Galvanic Separation Unit Types GSI 1, the Bently-Nevada 86517 with modifications 142533 or 159840 charge amplifier, or the Bently-Nevada dynamic pressure charge amplifier 350500. The Vibro-meter GSI setup conditions a pico-coulomb output from a dynamic pressure transducer (Vibro-meter CP216 or CP231) through a charge amplifier (Vibro-meter IPC 704) with a current output representing approximately 125 mA/psi.
The GSI unit provides an output AC signal (approx. � 2 V peak) that represents the dynamic pressure (gain expressed in milli-volts/psi ) riding on top of a DC bias voltage of approximately +7 V DC. The GSI unit requires a +24 V dc power supply. Normally, the power supply return for the GSI will be grounded externally, and the PCOM on the terminal board is not used. Only use PCOM when the external return ground is not used. The Bently-Nevada 86517 interface module converts the dynamic pressure transducer charge signal from pico-coulombs to milli-volts, which represents the pressure in psi. The interface module output is comprised of an ac signal (approx. � 1.2 V peak) riding on top of a negative dc bias voltage of approximately �10 V dc. The Bently-Nevada unit requires a -24 V dc power supply.
CONFIGURATION:
Two jumpers set the bias voltage for the transducers, and two jumpers set the power return from the transducers:
World of Controls (WOC) is a specialized global authority in the lifecycle extension of GE Mark VI ecosystems, providing the IS200DDPTH1A in both UNUSED and REBUILT conditions to eliminate operational latency. Our quality-assurance protocol involves comprehensive parametric testing, acoustic signal simulation, and insulation resistance checks. By partnering with WOC, you secure hardware for peak deterministic performance, reinforced by 24/7 technical consultation and accelerated global logistics to keep your plant operational and efficient.
What is the IS200DDPTH1A?
The IS200DDPTH1A is a Dynamic Pressure Transducer Terminal Board (DDPT) used in the GE Mark VI system. It is a specialized acoustic board that monitors high-frequency pressure pulsations in turbine combustion chambers.
Which transducers are compatible with the DDPT board?
It primarily supports Vibro-meter (with IPC 704 charge amplifiers and GSI units) and Bently-Nevada (350500 or 86517) dynamic pressure sensing equipment.
How does the board handle different excitation requirements?
The DDPT is versatile; it can supply +24 VDC for Vibro-meter setups or -24 VDC for Bently-Nevada hardware, depending on the system configuration and the specific interface modules used.
Why is the SCOM connection so important on this board?
Since the board handles low-level acoustic signals (pico-coulombs), any electrical noise can distort the data. The ten SCOM terminals provide a robust grounding point for shielded triplet wiring to maintain high signal-to-noise ratios.
