The GE IS220PDIAH1B is a crucial component within the GE Mark VIe Distributed Control System (DCS). Specifically, it is a Discrete Input I/O Pack. This module is designed to provide the electrical interface between the control system's Ethernet networks and various discrete input signals from the field.

Product Description

The IS220PDIAH1B is an I/O (Input/Output) pack that forms a vital part of GE's advanced Mark VIe control system. Its primary role is to accept discrete contact inputs from field devices. Discrete inputs are typically on/off signals, like the status of a limit switch, a push button, or an alarm contact.

This I/O pack features:

• A processor board: This is common to all Mark VIe distributed I/O packs, handling communication and basic processing.
• An acquisition board: This part is specific to the discrete input function, designed to reliably sense the state of input contacts.

The IS220PDIAH1B typically supports up to 24 discrete contact inputs. It connects to the control system via dual RJ45 Ethernet connectors for network communication and has a DC-37 pin connector for connecting directly to an associated terminal board. These terminal boards (such as IS200STCIH1A, IS200TBCIH2C, or IS400STCIH8A) handle the actual wiring from the field devices. The module is also certified for use in hazardous environments, making it suitable for demanding industrial applications.

Product Specifications

• Manufacturer: GE (General Electric)
• Model: IS220PDIAH1B
• Product Type: Discrete Input I/O Pack / Module
• System Compatibility: GE Mark VIe Distributed Control System
• Input Channels: Up to 24 discrete contact inputs
• Nominal Voltage Rating: 24 VDC
• Maximum Voltage Rating (I/O Pack): 28.6 VDC
• Maximum Voltage Rating (Contact Inputs): 32 VDC
• Communication Interface: Dual RJ45 Ethernet connectors (for redundant network connections)
• Signal Input Interface: DC-37 pin connector for connection to terminal boards
• Operating Temperature: -30°C to +65°C
• Certifications: UL Listed for both non-hazardous and hazardous environments (various Class and Zone UL designations apply, detailed in documentation).
• Associated Terminal Boards: Can be used with various terminal boards like IS200STCIH1A, IS200STCIH2A, IS200STCIH8A, IS200TBCIH2C, IS200TBCIH4C, IS400STCIH1A, IS400STCIH2A, IS400STCIH8A, IS400TBCIH2C, and others.

Product Application Cases

The GE IS220PDIAH1B is primarily used in large-scale industrial applications where the monitoring of discrete (on/off) signals from machinery and processes is critical for control, safety, and operational awareness.

• Turbine Control Systems: A core application for the Mark VIe system is in controlling and protecting gas and steam turbines in power generation plants. The IS220PDIAH1B monitors various discrete inputs such as:
• Valve limit switch positions (open/closed)
• Motor start/stop commands
• Circuit breaker status (open/closed)
• Protective trip signals (e.g., emergency stop buttons, overspeed trips)
• Auxiliary system statuses (e.g., pump running/stopped, fan on/off)
• Balance of Plant (BOP) Control: Beyond the turbine itself, in power plants and other large industrial facilities, it integrates inputs from various auxiliary systems like cooling water systems, fuel handling systems, and pollution control equipment.
• Oil & Gas Industry: In refineries, pipelines, and offshore platforms, it monitors the status of pumps, compressors, emergency shutdown (ESD) valves, fire detection systems, and level switches.

• Process Industries (e.g., Chemical, Pulp & Paper): Used to monitor the state of process equipment, safety interlocks, and operator controls, ensuring safe and efficient operation of continuous or batch processes.

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Click to download the relevant instruction manual

Mark_VIe_IO_modules_and_accessory_boards_IECEx_UL_21.0067X.pdf

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