IS220PDIAH1A, REV F - Discrete Input/Output Module

TECHNICAL SPECIFICATIONS:

Part Number: IS220PDIAH1A, REV F
Manufacturer: General Electric (GE)
Series: Mark VIe
Product Type: Discrete Input/Output Module
Input Signal Range: 24 V DC to 125 V DC
Processor Architecture: Dual Dual-Core ARM Processors
Communication Protocol: Dual Redundant 100Base-TX Ethernet
Sequence of Events (SOE): 1-Millisecond Resolution
Electrical Isolation: Optical Channel-to-Logic Isolation
Terminal Board Interface: Dual D-Sub Connectors
Form Factor: Compact Direct-Mount I/O Pack
Mounting: Terminal Board Integrated Mounting
PCB Protection: Conformal Coating
Operating Temperature: -30°C to +65°C
Storage Temperature: -40°C to +85°C
Relative Humidity: 5% to 95% Non-Condensing
Application: Turbine, Generator & Plant Monitoring
System Compatibility: GE Mark VIe DCS
Availability: In Stock
Country of Origin: United States
Manual: GEH-6721D

FUNCTIONAL DESCRIPTION OF IS220PDIAH1A REV F:

The IS220PDIAH1A, REV F, is a Discrete Input/Output Module designed and manufactured by General Electric for the Mark VIe Distributed Control System (DCS). The PDIAH1A I/O pack provides the electrical interface between one or two I/O Ethernet networks and a discrete input terminal board. The pack contains a processor board common to all Mark VIe distributed I/O packs and an acquisition board specific to the discrete input function. The pack accepts up to 24 contact inputs and terminal board-specific feedback signals; PDIA accepts three different voltage levels (with types TBCIH1, H2, and H3 terminal boards). Connections for the isolated discrete input board with voltage sensing (with type TICI board) are available. System input to the pack is through dual RJ45 Ethernet connectors and a three-pin power input. Discrete signal input is through a DC-37 pin connector that connects directly with the associated terminal board connector. Visual diagnostics are provided through indicator LEDs, and local diagnostic serial communications are possible through an infrared port.

INPUT SIGNALS:

The discrete input acquisition board provides the second stage of signal conditioning and level shifting to interface the terminal board inputs to the control logic. Initial signal conditioning is provided on the terminal board. The discrete input acquisition circuit is a comparator with a variable threshold. Each input is isolated from the control logic through an opto-coupler and an isolated power supply. The inputs are not isolated from each other. Each of the twenty-four inputs has filtering, hysteresis, and a yellow status LED that indicates when an input is picked up. The LED will be OFF when the input is dropped out.

VARIABLE THRESHOLD:

The input threshold is derived from the contact wetting voltage input terminal. In most applications, this voltage is scaled to provide a 50% input threshold. This threshold is clamped to 13% to prevent an indeterminate state if the contact wetting voltage drops to zero. If the contact wetting voltage drops below 40% of the nominal voltage, the under-voltage detector annunciates this condition to the control. A special test mode is provided to force the inputs from the control pack. Every four seconds, the threshold is pulsed high and then low, and the response of the opto- couplers is checked. Non-responding inputs are alarmed.

WHY BUY FROM WOC

World of Controls provides global sourcing, testing, repair, exchange, and lifecycle support for GE Mark VIe digital control equipment. The PDIAH1A Rev F module is subject to applicable inspection and pre-dispatch testing procedures to help verify channel performance, discrete contact response, Ethernet redundancy integrity, electrical isolation, and overall operational condition. We offer UNUSED surplus and professionally REBUILT modules, subject to availability, with warranty coverage, global express delivery, and technical support. Whether you need a replacement for an existing installation, a spare for planned maintenance, or a repair and exchange solution, our team helps simplify the procurement of critical industrial control equipment and minimize potential equipment downtime. Contact us to confirm availability, condition, testing options, pricing, and delivery requirements for your application. 

FREQUENTLY ASKED QUESTIONS

What is the GE IS220PDIAH1A Rev F?

The GE IS220PDIAH1A Rev F is a Mark VIe Discrete Input I/O Pack designed to receive and process discrete field contact signals within GE Mark VIe control systems. It interfaces dry or wetted field contacts with the control system over dual Ethernet connections, providing real-time contact monitoring and high-resolution Sequence of Events (SOE) tracking.

How does the device communicate with the Mark VIe system?

Communication is provided through dual redundant 100Base-TX Ethernet links using IEEE 802.3 communication. The redundant network architecture supports reliable communication within the distributed I/O system.

What happens when the contact wetting voltage becomes too low?

An under-voltage detector monitors the contact wetting voltage. When the voltage falls below the specified level, the condition can be annunciated to the control system for further investigation.

Does the device have an input testing function?

Yes. A dedicated test mode allows the control system to force the inputs from the I/O pack. The system periodically checks the response of the opto-couplers, and non-responding channels can be identified and alarmed.

Can World of Controls repair this module?

Yes. World of Controls provides repair and exchange services for applicable GE Mark VIe control equipment. Customers can provide the part number and unit condition to confirm repair availability, testing options, turnaround time, and exchange solutions.