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SPECIFICATIONS:
Part Number: IS210DDPTH1A
Manufacturer: General Electric
Series: Mark VI
Product Type: Dynamic Pressure Transducer Terminal Board
Number of trip solenoids: 3
Number of Transducers: 2
Common Mode Voltage Range: ±5 V
Size: 17.8 cm wide x 33.02 cm
MPU Pulse Rate Range: 2 Hz to 20 kHz
Operating temperature: -30 to 65°C
Input Voltage Power: +24 VDC
Transducer Power Supply: 24 V dc
Buffered Signal Outputs: 0.1 V/psi
MPU Pulse Rate Range 2 Hz to 20 kHz
Technology: Surface Mount
Repair: 3-7 Days
Availability: In Stock
Dimensions: 17.8 cm wide x 33.02 cm high
Country of Origin: United States
Manual: GEH-6421V
IS210DDPTH1A is a Simplex Dynamic Pressure Transducer Terminal Board designed and manufactured by General Electric as part of the Mark VI Series used in GE distributed Gas Turbine Control Systems. The Simplex Dynamic Pressure Transducer Input (DDPT) terminal board 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 transducers. It connects to the VAMA with two cables and is designed to meet Class 1, Division 2 environmental requirements for hazardous gases.
INSTALLATION:
Mount the plastic holder on the DIN-rail and slide the DDPT board into place. Connect the wires for the pressure transducers to the permanently mounted Euro-block type terminal block, which has 42 terminals. Typically, #18 AWG shielded twisted triplet wiring is used. Ten screws are provided for the SCOM (ground) connection. Connect cables from the DDPT JR1 connector to the VAMA J3 connector on the lower portion of the VME rack, and from the DDPT JR5 connector to the J5 connector on the front panel of the VAMA. These are latching-type connectors to secure the cables.
OPERATION:
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 μA/psi. The GSI unit provides an output ac signal (approx. ±2 V peak) that represents the dynamic pressure (gain expressed in mV/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 is grounded externally, and the PCOM on the terminal board is not used. PCOM should only be used 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 outputs 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. The pressure/acoustic signal is read differentially by connecting Pressure Wave Channel A High (ASIG) and Pressure Wave Channel A Low (ARET) to the DDPT inputs. Voltage clamping and high-frequency suppression are applied to the DDPT before the signal is routed to VAMA.
The jumpers, JPA and JPB, are used to add a bias corresponding to the dc bias provided by the third-party interface unit to detect open-circuit conditions. Therefore, a +28 V dc bias is added for the Vibro-Meter connection, and a -28 V dc bias is added for the Bently Nevada system. The DDPT board pressure wave outputs are ASIG/ARET for the output pair for channel A, and BSIG/BRET for the output pair for channel B. VAMA provides a buffered signal conditioning circuit for each BNC output on the DDPT terminal board. The BNC buffered circuit takes its input from the ac pressure wave input without the dc bias signal. The gain of the buffer is 1. The signal for the buffered BNC output ranges from 0 to 40 psi peak-to-peak, which is represented by an ac signal with a scaling of 0.1 V/psi.
WHY PARTNER WITH 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 gas turbine control and industrial excitation systems like the GE Mark VI, Mark VIe, and EX2100 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.
What is GE IS210DDPTH1A?
The IS210DDPTH1A is a Simplex Dynamic Pressure Transducer Terminal Board (DDPT) designed for the GE Mark VI control system. It serves as a specialized acoustic interface that monitors combustion pressure waves inside gas turbine combustion chambers to prevent acoustic damage.
What transducers and signal conditioners are compatible with this terminal board?
It is compatible with Vibro-Meter systems (using CP216/CP231 sensors with IPC 704 amplifiers) and Bently Nevada interface systems (such as the 86517 charge converter).
Why are jumpers JPA and JPB utilized on the board?
These jumpers add a diagnostic bias voltage (+28 VDC for Vibro-Meter or -28 VDC for Bently Nevada) to match the DC bias of the field unit, allowing the system to actively detect open-circuit wiring failures.
How is the buffered BNC output scaled on the DDPT board?
The VAMA-supported BNC buffer strips away the DC bias, outputting a raw AC pressure signal representing 0 to 40 psi peak-to-peak with a linear scaling of 0.1 V/psi.
What is the recommended wiring for field-side transducer connections?
Transducer signals should be wired to the 42-position Euro-block terminal block using #18 AWG shielded twisted triplet wiring to shield the high-frequency acoustic signals from electrical noise.
What are the standard repair and purchase options for the IS210DDPTH1A?
World of Controls offers this board in both Unused Surplus and professionally rebuilt conditions. If you choose to repair your module, our standard engineering evaluation and turnaround time is 3 to 7 days.
