Description
GE IS220PDIAH1A
The PDI (Pulse Detection Interface) module is part of the I/O (Input/Output) package for the GE Mark VIe series control systems. Its primary function is to receive and process pulse signals from field devices and convert them into digital data that the control system can understand and use.

1. Product Overview
The IS220PDIAH1A is a PDI (Pulse Detection Interface) module manufactured by General Electric (GE) for its Mark VIe gas/steam turbine control system. It is a component of the GE Mark VIe series I/O (Input/Output) pack. Its primary function is to receive and process pulse signals from field devices and convert them into digital data that the control system can understand and use.
2. Core Function
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Pulse Signal Processing: Specifically designed to connect to and monitor devices that provide a pulsed output.
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Frequency Measurement: Precisely measures the frequency of input pulses.
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Speed Monitoring: This is its most typical application. It monitors the rotational speed of machinery (e.g., the main shaft of a gas or steam turbine) by processing pulse signals from magnetic pickups or proximity probes.
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Flow Meter Interface: Can also be used to interface with certain types of flow meters that output pulses, for totalizing flow or measuring flow rate.
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Signal Conditioning: Filters, shapes, and isolates raw input pulse signals to improve noise immunity and measurement accuracy.
3. Key Technical Features
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Input Channels: Typically equipped with multiple independent pulse input channels.
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Input Signal Compatibility: Capable of receiving signals from various sensors, such as:
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Magnetic Speed Sensors
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Eddy Current Sensors (Proximity Probes)
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Hall Effect Sensors
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Photoelectric Encoders
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Signal Conditioning: Features configurable filters and threshold settings to eliminate noise interference.
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Backplane Communication: Communicates in real-time with the Mark VIe system controller (e.g., IS420UCVHH1A) via its high-speed backplane interface.
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Power Supply: The module receives operational power from the backplane of the I/O pack in which it is installed.
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LED Status Indicators: The module faceplate typically has LED indicators showing power, communication status, and input activity for each channel, facilitating field debugging and fault diagnosis.
4. Physical Appearance & Installation
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Form Factor: A standard, hot-swappable printed circuit board (PCB) module.
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Installation: It is inserted into a dedicated slot in a Mark VIe system I/O pack (e.g., EX2100e, Mark VIe I/O Pack).
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Connection: Field device signal cables are connected to the cabinet’s terminal boards (e.g., IS200TBAIH1C), which are then wired internally to this module.
5. Application Fields
The IS220PDIAH1A module is primarily used in critical industrial sectors, especially those reliant on large turbomachinery:
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Power Generation Industry: Gas turbine power plants, steam turbine power plants, combined-cycle power plants.
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Oil & Gas Industry: Used for pipeline compression and gas turbine-driven equipment on offshore platforms.
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Marine Propulsion: Used in gas turbine propulsion systems for naval vessels or large commercial ships.
6. Role in the Control System
Within the Mark VIe control system, the IS220PDIAH1A acts as the “eyes” and “ears” specifically for “listening” to the speed of rotating equipment. The speed data it acquires is crucial for the following key functions:
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Overspeed Protection: Prevents turbine speed from exceeding safe limits; this is one of the most critical protection functions.
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Speed Control: Serves as the core feedback for the control loop to maintain stable unit operation at a set speed.
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Sequential Control: Used for speed judgment during start-up and shutdown sequences (e.g., ignition speed, self-sustaining speed).
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Vibration Analysis: The speed signal is also a key reference signal for order tracking vibration analysis.
Sales of the brand:
ABB、EPRO、GE、FOXBORO、Schneider、Rexroth、Honeywell、Bently、YASKAWA other global DCS system and PLC system, servo system of famous industrial brand.
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🥇Product Condition: One-year warranty
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We have stock in stock and can accept same-day payment and delivery!
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3. Is there after-sales service?
Of course, if our products are brand new, they have a one-year warranty!
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Company Profile
Xingchuang Ronghe (Fuzhou) Electric Co., Ltd. is a company specializing in the sales and technical services of spare parts for the world’s top industrial automation systems. With our profound industry experience and stable supply channels, we provide domestic and foreign customers with original, authentic, complete models, and fast-delivered precision spare parts solutions. We are your reliable partner in ensuring production continuity and stability.
We specialize in distributing the following core brands and product lines:
ABB
- Process Control: ABB DCS process control system full range of components.
- ABB FreeLance AC800F power modules: SA801F/SA811F/SD802F/SD812F, EI811F/ABB EI812F/ABB EI813F, etc.
- ABB S800 analog I/O modules: AI801/AI810/AI825/AO801/AO845/AO895
- ABB S800 digital I/O modules: DI801/DI810/DO801/DO810
Bently Nevada
3500 Module Mainboards: 3500/42, 3500/45, 3500/40, 3500/50, etc.
(CPU Modules): 3200/32, 3500/25
3500 Module Minimum Cards: 128229-01, 128229-01, 133442-01, 125800-01, 167699-02, etc.
Extension Cables: 330850-50-05 (for preamplifier), 330730-040-00-00, 330103-00-06-10-02-00, etc.
EPRO
- MMS6000 TSI System: MMS6110/MMS6210/MMS6220 series monitoring modules.
Sensors: Proximitor sensors CON011, CON021, CON031, etc
GE
- PLC Systems: IC693, IC695, and IC697 Series Modules.
- Drives and Protection: GE DRIVE SYSTEMS Series Inverters, SR Integrated Protection Frame Series.
Rexroth
- Drives and Motors: Full range of Rexroth servo drives and controllers; models include: servo motor 2AD160B-B0350R2-BS03-D2V1, MSK040C-0600-NN-M1-UP1-NSNN, etc.
- Rexroth communication boards and amplifier boards: MTS-P01.2-D2-B1-E1-NN-NN-FWEP, VT-VPCD-1-1X/V0/1-0-1, VT5006-17B, etc.
Siemens
· Process Instruments and Controllers: Siemens MOORE series, common models include: QLCDM024DCBAN, 39ACM24BEN, 39AC12T4V1, 16114-171, etc.
· Automation Systems: Full range of SIMATIC S5 PLCs, SIMATIC S7-400 CPU modules and expansion modules, Simatic C7 systems, and various Siemens touch screens.











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